/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/loops-crafted-1/Mono5_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:28:08,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:28:08,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:28:08,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:28:08,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:28:08,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:28:08,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:28:08,761 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 20:28:08,768 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:28:08,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:28:08,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:28:08,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:28:08,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:28:08,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:28:08,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:28:08,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:28:08,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:28:08,770 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:28:08,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:28:08,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:28:08,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:28:08,770 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:28:08,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:28:08,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:28:08,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:28:08,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:28:08,771 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:28:08,771 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:28:08,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:28:08,771 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:28:08,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:28:08,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:28:08,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:28:08,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:28:08,956 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:28:08,958 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:28:08,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2022-04-06 20:28:09,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78f3db58b/badf3a0378d24ccaaac533746335871f/FLAGab6408578 [2022-04-06 20:28:09,315 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:28:09,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2022-04-06 20:28:09,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78f3db58b/badf3a0378d24ccaaac533746335871f/FLAGab6408578 [2022-04-06 20:28:09,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78f3db58b/badf3a0378d24ccaaac533746335871f [2022-04-06 20:28:09,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:28:09,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:28:09,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:28:09,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:28:09,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:28:09,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:28:09" (1/1) ... [2022-04-06 20:28:09,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5217f6fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09, skipping insertion in model container [2022-04-06 20:28:09,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:28:09" (1/1) ... [2022-04-06 20:28:09,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:28:09,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:28:09,867 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c[311,324] [2022-04-06 20:28:09,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:28:09,899 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:28:09,905 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c[311,324] [2022-04-06 20:28:09,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:28:09,915 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:28:09,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09 WrapperNode [2022-04-06 20:28:09,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:28:09,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:28:09,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:28:09,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:28:09,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09" (1/1) ... [2022-04-06 20:28:09,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09" (1/1) ... [2022-04-06 20:28:09,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09" (1/1) ... [2022-04-06 20:28:09,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09" (1/1) ... [2022-04-06 20:28:09,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09" (1/1) ... [2022-04-06 20:28:09,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09" (1/1) ... [2022-04-06 20:28:09,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09" (1/1) ... [2022-04-06 20:28:09,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:28:09,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:28:09,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:28:09,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:28:09,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09" (1/1) ... [2022-04-06 20:28:09,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:28:09,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:09,958 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 20:28:09,960 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 20:28:09,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:28:09,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:28:09,998 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:28:09,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:28:09,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:28:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:28:10,042 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:28:10,043 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:28:10,123 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:28:10,129 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:28:10,129 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 20:28:10,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:28:10 BoogieIcfgContainer [2022-04-06 20:28:10,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:28:10,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:28:10,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:28:10,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:28:10,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:28:09" (1/3) ... [2022-04-06 20:28:10,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434affed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:28:10, skipping insertion in model container [2022-04-06 20:28:10,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:09" (2/3) ... [2022-04-06 20:28:10,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434affed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:28:10, skipping insertion in model container [2022-04-06 20:28:10,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:28:10" (3/3) ... [2022-04-06 20:28:10,159 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono5_1.c [2022-04-06 20:28:10,168 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:28:10,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:28:10,202 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:28:10,216 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 20:28:10,216 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:28:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 20:28:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:28:10,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:10,235 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:10,236 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:10,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1326077006, now seen corresponding path program 1 times [2022-04-06 20:28:10,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:10,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [937840151] [2022-04-06 20:28:10,254 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:28:10,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1326077006, now seen corresponding path program 2 times [2022-04-06 20:28:10,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:10,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962323489] [2022-04-06 20:28:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:10,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:10,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:10,396 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 20:28:10,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962323489] [2022-04-06 20:28:10,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962323489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:10,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:10,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:28:10,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:10,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [937840151] [2022-04-06 20:28:10,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [937840151] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:10,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:10,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:28:10,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079552981] [2022-04-06 20:28:10,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:10,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:28:10,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:10,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:28:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:28:10,428 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:10,466 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-04-06 20:28:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:28:10,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-04-06 20:28:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:10,480 INFO L225 Difference]: With dead ends: 31 [2022-04-06 20:28:10,480 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 20:28:10,483 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 20:28:10,485 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 20:28:10,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 20:28:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 20:28:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 20:28:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-04-06 20:28:10,507 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-04-06 20:28:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:10,507 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-04-06 20:28:10,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-06 20:28:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:28:10,507 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:10,508 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:10,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:28:10,508 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-04-06 20:28:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:10,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1038107121] [2022-04-06 20:28:10,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:28:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 2 times [2022-04-06 20:28:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:10,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132783803] [2022-04-06 20:28:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:10,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:10,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:10,637 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 20:28:10,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:10,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132783803] [2022-04-06 20:28:10,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132783803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:10,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:10,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:28:10,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:10,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1038107121] [2022-04-06 20:28:10,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1038107121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:10,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:10,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:28:10,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657483463] [2022-04-06 20:28:10,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:10,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:28:10,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:10,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:28:10,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:28:10,640 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:10,697 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-04-06 20:28:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:28:10,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-04-06 20:28:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:10,698 INFO L225 Difference]: With dead ends: 22 [2022-04-06 20:28:10,698 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:28:10,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:28:10,699 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:10,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:28:10,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:28:10,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 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 20:28:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 20:28:10,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-06 20:28:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:10,704 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 20:28:10,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 20:28:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:28:10,705 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:10,705 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:10,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:28:10,705 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:10,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:10,706 INFO L85 PathProgramCache]: Analyzing trace with hash 644646283, now seen corresponding path program 1 times [2022-04-06 20:28:10,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:10,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [709354898] [2022-04-06 20:28:10,716 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:10,716 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:10,716 INFO L85 PathProgramCache]: Analyzing trace with hash 644646283, now seen corresponding path program 2 times [2022-04-06 20:28:10,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:10,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965643358] [2022-04-06 20:28:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:10,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:10,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:10,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965643358] [2022-04-06 20:28:10,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965643358] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:10,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:10,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:28:10,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:10,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [709354898] [2022-04-06 20:28:10,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [709354898] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:10,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:10,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:28:10,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354262439] [2022-04-06 20:28:10,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:10,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:28:10,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:28:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:28:10,783 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:10,816 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-04-06 20:28:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:28:10,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 20:28:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:10,818 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:28:10,818 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 20:28:10,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:28:10,821 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:10,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 20:28:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-04-06 20:28:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 20:28:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 20:28:10,832 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-04-06 20:28:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:10,832 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 20:28:10,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 20:28:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:28:10,833 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:10,833 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:10,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:28:10,833 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:10,833 INFO L85 PathProgramCache]: Analyzing trace with hash -244564223, now seen corresponding path program 1 times [2022-04-06 20:28:10,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:10,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1449245099] [2022-04-06 20:28:10,836 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:10,836 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash -244564223, now seen corresponding path program 2 times [2022-04-06 20:28:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:10,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245496559] [2022-04-06 20:28:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:10,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:10,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:10,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:10,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245496559] [2022-04-06 20:28:10,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245496559] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:10,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209913707] [2022-04-06 20:28:10,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:10,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:10,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:10,892 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 20:28:10,907 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 20:28:10,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:10,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:10,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:11,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:11,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209913707] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:11,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:11,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-04-06 20:28:11,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:11,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1449245099] [2022-04-06 20:28:11,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1449245099] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:11,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:11,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:28:11,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213685929] [2022-04-06 20:28:11,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:11,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:28:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:28:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:28:11,109 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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 20:28:11,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:11,202 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-04-06 20:28:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:28:11,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 20:28:11,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:11,204 INFO L225 Difference]: With dead ends: 31 [2022-04-06 20:28:11,204 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:28:11,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:28:11,208 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:11,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:28:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-04-06 20:28:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 20:28:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-04-06 20:28:11,221 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-04-06 20:28:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:11,224 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-04-06 20:28:11,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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 20:28:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-04-06 20:28:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:28:11,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:11,226 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:11,244 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 20:28:11,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:11,439 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:11,440 INFO L85 PathProgramCache]: Analyzing trace with hash 643533259, now seen corresponding path program 3 times [2022-04-06 20:28:11,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:11,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [644211634] [2022-04-06 20:28:11,442 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:11,442 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash 643533259, now seen corresponding path program 4 times [2022-04-06 20:28:11,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:11,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587968953] [2022-04-06 20:28:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:11,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:11,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:11,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:11,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587968953] [2022-04-06 20:28:11,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587968953] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:11,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719305368] [2022-04-06 20:28:11,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:11,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:11,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:11,524 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 20:28:11,525 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 20:28:11,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:11,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:11,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:28:11,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:28:11,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719305368] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:11,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:11,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-04-06 20:28:11,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:11,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [644211634] [2022-04-06 20:28:11,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [644211634] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:11,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:11,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:28:11,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463262895] [2022-04-06 20:28:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:11,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:28:11,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:28:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:28:11,713 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:11,773 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-06 20:28:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:28:11,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:28:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:11,775 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:28:11,775 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:28:11,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:28:11,778 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:11,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:28:11,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-06 20:28:11,787 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 20:28:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-06 20:28:11,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-04-06 20:28:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:11,790 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-06 20:28:11,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-06 20:28:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:28:11,791 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:11,791 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:11,807 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 20:28:12,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:12,008 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash 957076161, now seen corresponding path program 5 times [2022-04-06 20:28:12,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:12,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1200063720] [2022-04-06 20:28:12,010 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:12,010 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:12,010 INFO L85 PathProgramCache]: Analyzing trace with hash 957076161, now seen corresponding path program 6 times [2022-04-06 20:28:12,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:12,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740380167] [2022-04-06 20:28:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:12,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:12,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:12,083 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:12,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:12,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740380167] [2022-04-06 20:28:12,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740380167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:12,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043262156] [2022-04-06 20:28:12,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:12,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:12,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:12,085 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 20:28:12,086 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 20:28:12,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:12,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:12,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:28:12,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:28:12,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043262156] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:12,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:12,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-04-06 20:28:12,346 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:12,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1200063720] [2022-04-06 20:28:12,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1200063720] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:12,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:12,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:28:12,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815184980] [2022-04-06 20:28:12,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:12,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:28:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:28:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:28:12,347 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 20:28:12,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:12,421 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-04-06 20:28:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:28:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 20:28:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:12,423 INFO L225 Difference]: With dead ends: 37 [2022-04-06 20:28:12,424 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 20:28:12,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:28:12,424 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:12,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 20:28:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 20:28:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-04-06 20:28:12,429 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2022-04-06 20:28:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:12,429 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-04-06 20:28:12,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 20:28:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-06 20:28:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:28:12,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:12,429 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:12,448 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 20:28:12,646 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:12,646 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:12,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:12,647 INFO L85 PathProgramCache]: Analyzing trace with hash 159800843, now seen corresponding path program 7 times [2022-04-06 20:28:12,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:12,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [734504748] [2022-04-06 20:28:12,648 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:12,648 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash 159800843, now seen corresponding path program 8 times [2022-04-06 20:28:12,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:12,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811233087] [2022-04-06 20:28:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:12,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:12,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:12,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811233087] [2022-04-06 20:28:12,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811233087] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:12,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787668500] [2022-04-06 20:28:12,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:12,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:12,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:12,753 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 20:28:12,755 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 20:28:12,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:12,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:12,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:12,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 20:28:12,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 20:28:12,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787668500] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:12,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:12,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2022-04-06 20:28:12,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:12,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [734504748] [2022-04-06 20:28:12,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [734504748] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:12,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:12,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:28:12,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598414932] [2022-04-06 20:28:12,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:12,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:28:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:12,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:28:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:28:12,908 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:12,995 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-04-06 20:28:12,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:28:12,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 20:28:12,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:12,995 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:28:12,996 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:28:12,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:28:12,996 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:12,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:28:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-04-06 20:28:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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 20:28:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-04-06 20:28:13,001 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2022-04-06 20:28:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:13,001 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-04-06 20:28:13,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-04-06 20:28:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:28:13,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:13,002 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:13,020 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 20:28:13,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:13,215 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:13,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:13,216 INFO L85 PathProgramCache]: Analyzing trace with hash -300050815, now seen corresponding path program 9 times [2022-04-06 20:28:13,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:13,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1136149183] [2022-04-06 20:28:13,217 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:13,217 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash -300050815, now seen corresponding path program 10 times [2022-04-06 20:28:13,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:13,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843348775] [2022-04-06 20:28:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:13,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:13,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:13,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:13,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843348775] [2022-04-06 20:28:13,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843348775] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:13,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185201830] [2022-04-06 20:28:13,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:13,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:13,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:13,300 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 20:28:13,301 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 20:28:13,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:13,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:13,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:13,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:28:13,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:28:13,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185201830] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:13,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:13,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 15 [2022-04-06 20:28:13,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:13,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1136149183] [2022-04-06 20:28:13,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1136149183] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:13,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:13,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:28:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478536464] [2022-04-06 20:28:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:13,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:28:13,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:28:13,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:28:13,522 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20:28:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:13,645 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-04-06 20:28:13,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:28:13,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20:28:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:13,646 INFO L225 Difference]: With dead ends: 43 [2022-04-06 20:28:13,646 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 20:28:13,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:28:13,647 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:13,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 19 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 20:28:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 20:28:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-04-06 20:28:13,655 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2022-04-06 20:28:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:13,656 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-04-06 20:28:13,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20:28:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-04-06 20:28:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:28:13,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:13,657 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:13,675 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 20:28:13,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:13,873 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1204879947, now seen corresponding path program 11 times [2022-04-06 20:28:13,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:13,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1042957597] [2022-04-06 20:28:13,875 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:13,875 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1204879947, now seen corresponding path program 12 times [2022-04-06 20:28:13,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:13,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082209214] [2022-04-06 20:28:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:13,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:13,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:13,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:13,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082209214] [2022-04-06 20:28:13,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082209214] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:13,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891658423] [2022-04-06 20:28:13,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:13,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:13,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:13,978 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 20:28:13,979 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 20:28:14,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:14,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:14,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:14,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 20:28:14,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 20:28:14,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891658423] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:14,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:14,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 16 [2022-04-06 20:28:14,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1042957597] [2022-04-06 20:28:14,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1042957597] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:14,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:14,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:28:14,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906965360] [2022-04-06 20:28:14,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:14,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:28:14,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:14,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:28:14,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:28:14,158 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:14,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:14,278 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-04-06 20:28:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:28:14,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:28:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:14,279 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:28:14,279 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:28:14,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:28:14,281 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:14,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:28:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:28:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-04-06 20:28:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 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 20:28:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-04-06 20:28:14,289 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2022-04-06 20:28:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:14,289 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-04-06 20:28:14,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-04-06 20:28:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:28:14,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:14,290 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:14,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:14,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:14,503 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash -566392255, now seen corresponding path program 13 times [2022-04-06 20:28:14,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:14,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1106695067] [2022-04-06 20:28:14,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:14,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash -566392255, now seen corresponding path program 14 times [2022-04-06 20:28:14,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:14,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763199944] [2022-04-06 20:28:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:14,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:14,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:14,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:14,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763199944] [2022-04-06 20:28:14,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763199944] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:14,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223476826] [2022-04-06 20:28:14,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:14,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:14,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:14,598 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 20:28:14,599 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 20:28:14,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:14,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:14,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:14,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 20:28:14,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 20:28:14,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223476826] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:14,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:14,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2022-04-06 20:28:14,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1106695067] [2022-04-06 20:28:14,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1106695067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:14,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:14,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:28:14,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735222223] [2022-04-06 20:28:14,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:14,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:28:14,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:28:14,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:28:14,795 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20:28:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:14,951 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-04-06 20:28:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:28:14,951 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20:28:14,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:14,952 INFO L225 Difference]: With dead ends: 49 [2022-04-06 20:28:14,952 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 20:28:14,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:28:14,953 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:14,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 24 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:28:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 20:28:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-04-06 20:28:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-04-06 20:28:14,958 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2022-04-06 20:28:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:14,958 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-04-06 20:28:14,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20:28:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-04-06 20:28:14,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:28:14,959 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:14,959 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:14,977 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 20:28:15,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:15,175 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash -568363381, now seen corresponding path program 15 times [2022-04-06 20:28:15,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:15,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [108780383] [2022-04-06 20:28:15,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:15,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash -568363381, now seen corresponding path program 16 times [2022-04-06 20:28:15,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:15,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803964357] [2022-04-06 20:28:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:15,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:15,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:15,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803964357] [2022-04-06 20:28:15,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803964357] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:15,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617352903] [2022-04-06 20:28:15,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:15,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:15,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:15,311 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 20:28:15,312 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 20:28:15,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:15,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:15,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:15,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 20:28:15,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 20:28:15,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617352903] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:15,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:15,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 18 [2022-04-06 20:28:15,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:15,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [108780383] [2022-04-06 20:28:15,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [108780383] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:15,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:15,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:28:15,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904767424] [2022-04-06 20:28:15,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:15,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:28:15,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:15,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:28:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:28:15,545 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:15,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:15,740 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-04-06 20:28:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:28:15,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:28:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:15,741 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:28:15,741 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 20:28:15,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:28:15,742 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:15,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 59 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:28:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 20:28:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-04-06 20:28:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 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 20:28:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-04-06 20:28:15,747 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2022-04-06 20:28:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:15,748 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-04-06 20:28:15,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-04-06 20:28:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:28:15,748 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:15,748 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:15,764 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 20:28:15,963 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,SelfDestructingSolverStorable10 [2022-04-06 20:28:15,963 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash 839364097, now seen corresponding path program 17 times [2022-04-06 20:28:15,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:15,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858124564] [2022-04-06 20:28:15,965 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:15,965 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash 839364097, now seen corresponding path program 18 times [2022-04-06 20:28:15,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:15,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325415701] [2022-04-06 20:28:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:15,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:16,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:16,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:16,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325415701] [2022-04-06 20:28:16,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325415701] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:16,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940088599] [2022-04-06 20:28:16,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:16,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:16,097 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 20:28:16,098 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 20:28:16,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:16,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:16,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:28:16,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:28:16,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940088599] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:16,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:16,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2022-04-06 20:28:16,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:16,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858124564] [2022-04-06 20:28:16,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858124564] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:16,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:16,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:28:16,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297106093] [2022-04-06 20:28:16,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:16,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:28:16,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:16,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:28:16,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:28:16,333 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 20:28:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:16,547 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-04-06 20:28:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:28:16,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 20:28:16,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:16,548 INFO L225 Difference]: With dead ends: 55 [2022-04-06 20:28:16,548 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:28:16,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:28:16,549 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:16,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 44 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:28:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:28:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 20:28:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-04-06 20:28:16,554 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2022-04-06 20:28:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:16,554 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-04-06 20:28:16,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 20:28:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-04-06 20:28:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:28:16,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:16,555 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:16,574 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 20:28:16,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:16,756 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:16,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1906984245, now seen corresponding path program 19 times [2022-04-06 20:28:16,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:16,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [972473766] [2022-04-06 20:28:16,757 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:16,758 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:16,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1906984245, now seen corresponding path program 20 times [2022-04-06 20:28:16,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:16,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341901720] [2022-04-06 20:28:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:16,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:16,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:16,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341901720] [2022-04-06 20:28:16,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341901720] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:16,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715607483] [2022-04-06 20:28:16,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:16,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:16,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:16,889 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 20:28:16,895 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 20:28:16,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:16,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:16,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:16,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-04-06 20:28:17,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-04-06 20:28:17,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715607483] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:17,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:17,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 20 [2022-04-06 20:28:17,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:17,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [972473766] [2022-04-06 20:28:17,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [972473766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:17,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:17,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:28:17,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050773112] [2022-04-06 20:28:17,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:17,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:28:17,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:17,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:28:17,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:28:17,141 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:17,384 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-04-06 20:28:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:28:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:28:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:17,385 INFO L225 Difference]: With dead ends: 58 [2022-04-06 20:28:17,385 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:28:17,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:28:17,386 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:17,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:28:17,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:28:17,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 20:28:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 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 20:28:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-04-06 20:28:17,392 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2022-04-06 20:28:17,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:17,392 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-04-06 20:28:17,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-04-06 20:28:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:28:17,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:17,392 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:17,408 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 20:28:17,607 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,SelfDestructingSolverStorable12 [2022-04-06 20:28:17,607 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash 756548033, now seen corresponding path program 21 times [2022-04-06 20:28:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:17,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [98403869] [2022-04-06 20:28:17,609 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:17,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:17,609 INFO L85 PathProgramCache]: Analyzing trace with hash 756548033, now seen corresponding path program 22 times [2022-04-06 20:28:17,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:17,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761675971] [2022-04-06 20:28:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:17,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:17,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:17,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:17,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761675971] [2022-04-06 20:28:17,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761675971] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:17,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254576283] [2022-04-06 20:28:17,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:17,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:17,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:17,755 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 20:28:17,756 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 20:28:17,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:17,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:17,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:17,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-06 20:28:17,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-06 20:28:18,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254576283] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:18,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:18,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 21 [2022-04-06 20:28:18,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:18,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [98403869] [2022-04-06 20:28:18,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [98403869] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:18,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:18,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:28:18,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737482417] [2022-04-06 20:28:18,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:18,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:28:18,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:18,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:28:18,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:28:18,004 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:28:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:18,323 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-04-06 20:28:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:28:18,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:28:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:18,324 INFO L225 Difference]: With dead ends: 61 [2022-04-06 20:28:18,324 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 20:28:18,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:28:18,324 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:18,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 74 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:28:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 20:28:18,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-04-06 20:28:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-04-06 20:28:18,330 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2022-04-06 20:28:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:18,330 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-04-06 20:28:18,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:28:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-04-06 20:28:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:28:18,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:18,331 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:18,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:18,543 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,SelfDestructingSolverStorable13 [2022-04-06 20:28:18,543 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash 525848331, now seen corresponding path program 23 times [2022-04-06 20:28:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:18,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1479487899] [2022-04-06 20:28:18,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:18,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:18,545 INFO L85 PathProgramCache]: Analyzing trace with hash 525848331, now seen corresponding path program 24 times [2022-04-06 20:28:18,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:18,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384424031] [2022-04-06 20:28:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:18,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:18,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:18,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384424031] [2022-04-06 20:28:18,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384424031] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883514736] [2022-04-06 20:28:18,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:18,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:18,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:18,725 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 20:28:18,726 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 20:28:18,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:18,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:18,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:18,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-06 20:28:18,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-06 20:28:19,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883514736] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:19,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:19,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 22 [2022-04-06 20:28:19,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:19,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1479487899] [2022-04-06 20:28:19,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1479487899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:19,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:19,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:28:19,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542373309] [2022-04-06 20:28:19,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:19,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:28:19,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:19,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:28:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:28:19,017 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:19,353 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-04-06 20:28:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:28:19,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:28:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:19,354 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:28:19,354 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 20:28:19,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:28:19,355 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:19,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 79 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:28:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 20:28:19,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 20:28:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 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 20:28:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-04-06 20:28:19,361 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2022-04-06 20:28:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:19,361 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-04-06 20:28:19,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-04-06 20:28:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:28:19,361 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:19,361 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:19,381 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 20:28:19,571 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,SelfDestructingSolverStorable14 [2022-04-06 20:28:19,571 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash -301300351, now seen corresponding path program 25 times [2022-04-06 20:28:19,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:19,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589019456] [2022-04-06 20:28:19,573 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:19,573 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash -301300351, now seen corresponding path program 26 times [2022-04-06 20:28:19,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:19,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677160524] [2022-04-06 20:28:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:19,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:19,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:19,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:19,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677160524] [2022-04-06 20:28:19,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677160524] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:19,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736519478] [2022-04-06 20:28:19,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:19,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:19,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:19,760 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 20:28:19,761 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 20:28:19,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:19,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:19,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:19,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-06 20:28:19,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-06 20:28:20,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736519478] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:20,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:20,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2022-04-06 20:28:20,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:20,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [589019456] [2022-04-06 20:28:20,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [589019456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:20,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:20,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:28:20,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502176513] [2022-04-06 20:28:20,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:20,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:28:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:28:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:28:20,065 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 20:28:20,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:20,424 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-04-06 20:28:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:28:20,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 20:28:20,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:20,425 INFO L225 Difference]: With dead ends: 67 [2022-04-06 20:28:20,425 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 20:28:20,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:28:20,426 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:20,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 79 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:28:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 20:28:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 20:28:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-04-06 20:28:20,431 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2022-04-06 20:28:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:20,432 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-04-06 20:28:20,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 20:28:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-04-06 20:28:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:28:20,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:20,432 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:20,450 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 20:28:20,643 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,SelfDestructingSolverStorable15 [2022-04-06 20:28:20,643 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:20,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:20,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1660308661, now seen corresponding path program 27 times [2022-04-06 20:28:20,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:20,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [929148238] [2022-04-06 20:28:20,645 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:20,645 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:20,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1660308661, now seen corresponding path program 28 times [2022-04-06 20:28:20,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:20,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265829608] [2022-04-06 20:28:20,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:20,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:20,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:20,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:20,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265829608] [2022-04-06 20:28:20,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265829608] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:20,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626785246] [2022-04-06 20:28:20,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:20,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:20,855 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 20:28:20,856 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 20:28:20,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:20,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:20,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:20,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-04-06 20:28:21,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-04-06 20:28:21,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626785246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:21,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:21,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 24 [2022-04-06 20:28:21,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:21,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [929148238] [2022-04-06 20:28:21,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [929148238] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:21,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:21,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:28:21,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226103155] [2022-04-06 20:28:21,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:21,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:28:21,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:21,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:28:21,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:28:21,140 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:21,570 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-04-06 20:28:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:28:21,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:28:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:21,570 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:28:21,570 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:28:21,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:28:21,571 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:21,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 74 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:28:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:28:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-04-06 20:28:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 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 20:28:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-04-06 20:28:21,577 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2022-04-06 20:28:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:21,577 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-04-06 20:28:21,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-04-06 20:28:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:28:21,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:21,578 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:21,594 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 20:28:21,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:21,779 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:21,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:21,779 INFO L85 PathProgramCache]: Analyzing trace with hash 779827521, now seen corresponding path program 29 times [2022-04-06 20:28:21,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:21,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [818801563] [2022-04-06 20:28:21,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:21,780 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash 779827521, now seen corresponding path program 30 times [2022-04-06 20:28:21,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:21,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519785093] [2022-04-06 20:28:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 31 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:22,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:22,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519785093] [2022-04-06 20:28:22,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519785093] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:22,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414911799] [2022-04-06 20:28:22,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:22,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:22,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:22,004 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 20:28:22,004 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 20:28:22,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:22,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:22,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:22,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-04-06 20:28:22,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-04-06 20:28:22,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414911799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:22,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:22,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 25 [2022-04-06 20:28:22,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:22,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [818801563] [2022-04-06 20:28:22,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [818801563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:22,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:22,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:28:22,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861949945] [2022-04-06 20:28:22,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:22,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:28:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:28:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:28:22,300 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 20:28:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:22,726 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-04-06 20:28:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:28:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 20:28:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:22,727 INFO L225 Difference]: With dead ends: 73 [2022-04-06 20:28:22,727 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:28:22,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:28:22,728 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:22,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 44 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:28:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:28:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-04-06 20:28:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-04-06 20:28:22,734 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2022-04-06 20:28:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:22,734 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-04-06 20:28:22,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 20:28:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-04-06 20:28:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:28:22,735 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:22,735 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:22,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:22,943 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,SelfDestructingSolverStorable17 [2022-04-06 20:28:22,944 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1739626613, now seen corresponding path program 31 times [2022-04-06 20:28:22,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:22,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [437824790] [2022-04-06 20:28:22,948 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:22,949 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1739626613, now seen corresponding path program 32 times [2022-04-06 20:28:22,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:22,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065050379] [2022-04-06 20:28:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:23,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:23,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:23,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065050379] [2022-04-06 20:28:23,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065050379] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:23,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810008450] [2022-04-06 20:28:23,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:23,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:23,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:23,195 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 20:28:23,199 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 20:28:23,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:23,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:23,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:23,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-04-06 20:28:23,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-04-06 20:28:23,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810008450] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:23,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:23,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6, 6] total 26 [2022-04-06 20:28:23,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:23,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [437824790] [2022-04-06 20:28:23,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [437824790] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:23,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:23,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:28:23,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947618699] [2022-04-06 20:28:23,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:23,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:28:23,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:23,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:28:23,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:28:23,503 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:23,981 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-04-06 20:28:23,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:28:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:28:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:23,982 INFO L225 Difference]: With dead ends: 76 [2022-04-06 20:28:23,982 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 20:28:23,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:28:23,983 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:23,983 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 99 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:28:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 20:28:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-04-06 20:28:23,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 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 20:28:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-04-06 20:28:23,990 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2022-04-06 20:28:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:23,990 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-04-06 20:28:23,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-04-06 20:28:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:28:23,990 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:23,990 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:24,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:24,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:24,206 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:24,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:24,207 INFO L85 PathProgramCache]: Analyzing trace with hash 50732289, now seen corresponding path program 33 times [2022-04-06 20:28:24,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:24,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2142369476] [2022-04-06 20:28:24,208 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:24,208 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash 50732289, now seen corresponding path program 34 times [2022-04-06 20:28:24,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:24,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059452182] [2022-04-06 20:28:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:24,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:24,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:24,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059452182] [2022-04-06 20:28:24,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059452182] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:24,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909216315] [2022-04-06 20:28:24,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:24,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:24,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:24,461 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 20:28:24,462 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 20:28:24,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:24,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:24,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:24,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-04-06 20:28:24,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-04-06 20:28:24,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909216315] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:24,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:24,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 6, 6] total 27 [2022-04-06 20:28:24,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:24,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2142369476] [2022-04-06 20:28:24,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2142369476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:24,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:24,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:28:24,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071048172] [2022-04-06 20:28:24,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:24,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:28:24,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:24,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:28:24,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:28:24,769 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 20:28:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:25,293 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-04-06 20:28:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:28:25,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 20:28:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:25,294 INFO L225 Difference]: With dead ends: 79 [2022-04-06 20:28:25,294 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 20:28:25,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=1802, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:28:25,295 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:25,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 64 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:28:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 20:28:25,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-04-06 20:28:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-04-06 20:28:25,302 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2022-04-06 20:28:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:25,302 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-04-06 20:28:25,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 20:28:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-04-06 20:28:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:28:25,302 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:25,302 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:25,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:25,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:25,519 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:25,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1728900043, now seen corresponding path program 35 times [2022-04-06 20:28:25,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:25,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [344721808] [2022-04-06 20:28:25,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:25,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1728900043, now seen corresponding path program 36 times [2022-04-06 20:28:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:25,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923677584] [2022-04-06 20:28:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:25,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:25,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923677584] [2022-04-06 20:28:25,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923677584] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010706485] [2022-04-06 20:28:25,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:25,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:25,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:25,771 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 20:28:25,772 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 20:28:25,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:25,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:25,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:25,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-06 20:28:25,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-06 20:28:26,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010706485] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:26,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:26,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 6, 6] total 28 [2022-04-06 20:28:26,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:26,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [344721808] [2022-04-06 20:28:26,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [344721808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:26,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:26,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:28:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486588688] [2022-04-06 20:28:26,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:26,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:28:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:28:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:28:26,125 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:26,731 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-04-06 20:28:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:28:26,732 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:28:26,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:26,732 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:28:26,732 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 20:28:26,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=1975, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:28:26,733 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:26,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 99 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:28:26,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 20:28:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-04-06 20:28:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 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 20:28:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-04-06 20:28:26,740 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2022-04-06 20:28:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:26,740 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-04-06 20:28:26,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:26,740 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-04-06 20:28:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:28:26,741 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:26,741 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:26,759 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 20:28:26,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:26,941 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:26,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1689833279, now seen corresponding path program 37 times [2022-04-06 20:28:26,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:26,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1918275002] [2022-04-06 20:28:26,943 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:26,943 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1689833279, now seen corresponding path program 38 times [2022-04-06 20:28:26,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:26,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587997031] [2022-04-06 20:28:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:26,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:27,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:27,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:27,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587997031] [2022-04-06 20:28:27,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587997031] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:27,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50471967] [2022-04-06 20:28:27,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:27,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:27,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:27,206 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 20:28:27,211 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 20:28:27,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:27,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:27,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:27,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-04-06 20:28:27,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-04-06 20:28:27,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50471967] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:27,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:27,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 6, 6] total 29 [2022-04-06 20:28:27,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:27,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1918275002] [2022-04-06 20:28:27,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1918275002] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:27,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:27,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:28:27,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444686688] [2022-04-06 20:28:27,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:27,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:28:27,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:28:27,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:28:27,547 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 20:28:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:28,194 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-04-06 20:28:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:28:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 20:28:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:28,196 INFO L225 Difference]: With dead ends: 85 [2022-04-06 20:28:28,196 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:28:28,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=2156, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:28:28,197 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:28,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 104 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:28:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:28:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-04-06 20:28:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-04-06 20:28:28,204 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2022-04-06 20:28:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:28,204 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-04-06 20:28:28,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 20:28:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-04-06 20:28:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 20:28:28,205 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:28,205 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:28,221 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 20:28:28,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:28,405 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:28,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1680228363, now seen corresponding path program 39 times [2022-04-06 20:28:28,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:28,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78349282] [2022-04-06 20:28:28,411 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:28,411 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:28,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1680228363, now seen corresponding path program 40 times [2022-04-06 20:28:28,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:28,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528694370] [2022-04-06 20:28:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:28,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:28,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:28,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:28,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528694370] [2022-04-06 20:28:28,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528694370] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:28,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888717740] [2022-04-06 20:28:28,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:28,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:28,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:28,699 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 20:28:28,700 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 20:28:28,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:28,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:28,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:28,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-04-06 20:28:28,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-04-06 20:28:29,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888717740] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:29,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:29,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 30 [2022-04-06 20:28:29,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:29,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78349282] [2022-04-06 20:28:29,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78349282] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:29,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:29,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:28:29,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782229756] [2022-04-06 20:28:29,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:29,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:28:29,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:29,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:28:29,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:28:29,041 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:29,694 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-04-06 20:28:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:28:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-04-06 20:28:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:29,695 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:28:29,695 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:28:29,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=2345, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:28:29,695 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:29,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 24 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:28:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:28:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-04-06 20:28:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 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 20:28:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-04-06 20:28:29,703 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2022-04-06 20:28:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:29,703 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-04-06 20:28:29,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-04-06 20:28:29,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:28:29,704 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:29,704 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:29,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:29,911 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,SelfDestructingSolverStorable22 [2022-04-06 20:28:29,911 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash 31093889, now seen corresponding path program 41 times [2022-04-06 20:28:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:29,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [504265463] [2022-04-06 20:28:29,913 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:29,913 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash 31093889, now seen corresponding path program 42 times [2022-04-06 20:28:29,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:29,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996402598] [2022-04-06 20:28:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:30,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 43 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:30,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:30,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996402598] [2022-04-06 20:28:30,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996402598] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:30,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627328202] [2022-04-06 20:28:30,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:30,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:30,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:30,220 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 20:28:30,221 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 20:28:30,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:30,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:30,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:30,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-04-06 20:28:30,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-04-06 20:28:30,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627328202] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:30,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:30,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 31 [2022-04-06 20:28:30,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:30,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [504265463] [2022-04-06 20:28:30,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [504265463] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:30,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:30,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:28:30,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128020335] [2022-04-06 20:28:30,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:30,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:28:30,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:28:30,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:28:30,566 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 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 20:28:31,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:31,306 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-04-06 20:28:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:28:31,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 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 20:28:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:31,307 INFO L225 Difference]: With dead ends: 91 [2022-04-06 20:28:31,307 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 20:28:31,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=2542, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:28:31,308 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:31,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 109 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:28:31,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 20:28:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-04-06 20:28:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-04-06 20:28:31,316 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2022-04-06 20:28:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:31,316 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-04-06 20:28:31,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 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 20:28:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-04-06 20:28:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 20:28:31,316 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:31,317 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:31,332 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 20:28:31,531 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,SelfDestructingSolverStorable23 [2022-04-06 20:28:31,531 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash 796877899, now seen corresponding path program 43 times [2022-04-06 20:28:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:31,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [880637776] [2022-04-06 20:28:31,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:31,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:31,533 INFO L85 PathProgramCache]: Analyzing trace with hash 796877899, now seen corresponding path program 44 times [2022-04-06 20:28:31,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:31,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186644267] [2022-04-06 20:28:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:31,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:31,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:31,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:31,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186644267] [2022-04-06 20:28:31,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186644267] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:31,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093888493] [2022-04-06 20:28:31,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:31,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:31,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:31,866 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 20:28:31,867 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 20:28:31,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:31,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:31,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-04-06 20:28:32,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-04-06 20:28:32,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093888493] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:32,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:32,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 6, 6] total 32 [2022-04-06 20:28:32,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [880637776] [2022-04-06 20:28:32,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [880637776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:32,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:32,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:28:32,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342399415] [2022-04-06 20:28:32,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:32,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:28:32,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:32,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:28:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:28:32,256 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:33,073 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-04-06 20:28:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:28:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-04-06 20:28:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:33,074 INFO L225 Difference]: With dead ends: 94 [2022-04-06 20:28:33,074 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:28:33,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=2747, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:28:33,075 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:33,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 129 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:28:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:28:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-04-06 20:28:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 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 20:28:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-04-06 20:28:33,083 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2022-04-06 20:28:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:33,083 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-04-06 20:28:33,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-04-06 20:28:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:28:33,084 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:33,084 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:33,100 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 20:28:33,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:33,291 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:33,292 INFO L85 PathProgramCache]: Analyzing trace with hash -597956543, now seen corresponding path program 45 times [2022-04-06 20:28:33,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:33,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [100240101] [2022-04-06 20:28:33,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:33,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash -597956543, now seen corresponding path program 46 times [2022-04-06 20:28:33,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:33,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872222109] [2022-04-06 20:28:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:33,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 47 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:33,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:33,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872222109] [2022-04-06 20:28:33,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872222109] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:33,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692828526] [2022-04-06 20:28:33,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:33,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:33,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:33,650 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 20:28:33,650 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 20:28:33,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:33,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:33,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:33,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-04-06 20:28:33,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-04-06 20:28:34,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692828526] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:34,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:34,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 6, 6] total 33 [2022-04-06 20:28:34,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:34,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [100240101] [2022-04-06 20:28:34,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [100240101] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:34,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:34,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:28:34,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283073589] [2022-04-06 20:28:34,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:34,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:28:34,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:34,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:28:34,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:28:34,086 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 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 20:28:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:34,905 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-04-06 20:28:34,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:28:34,905 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 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 20:28:34,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:34,906 INFO L225 Difference]: With dead ends: 97 [2022-04-06 20:28:34,906 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 20:28:34,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:28:34,907 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:34,907 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 29 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:28:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 20:28:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-04-06 20:28:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-04-06 20:28:34,916 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2022-04-06 20:28:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:34,916 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-04-06 20:28:34,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 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 20:28:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-04-06 20:28:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 20:28:34,916 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:34,916 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:34,934 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 20:28:35,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:35,133 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:35,133 INFO L85 PathProgramCache]: Analyzing trace with hash -302229365, now seen corresponding path program 47 times [2022-04-06 20:28:35,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:35,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2046135582] [2022-04-06 20:28:35,135 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:35,135 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash -302229365, now seen corresponding path program 48 times [2022-04-06 20:28:35,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:35,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803965375] [2022-04-06 20:28:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:35,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:35,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 49 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:35,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803965375] [2022-04-06 20:28:35,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803965375] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:35,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146295430] [2022-04-06 20:28:35,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:35,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:35,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:35,524 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 20:28:35,524 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 20:28:35,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:35,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:35,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-04-06 20:28:35,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-04-06 20:28:35,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146295430] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:35,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:35,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 6, 6] total 34 [2022-04-06 20:28:35,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:35,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2046135582] [2022-04-06 20:28:35,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2046135582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:35,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:35,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:28:35,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280230056] [2022-04-06 20:28:35,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:35,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:28:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:28:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:28:35,908 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:36,837 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-04-06 20:28:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:28:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-04-06 20:28:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:36,838 INFO L225 Difference]: With dead ends: 100 [2022-04-06 20:28:36,838 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:28:36,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=3181, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:28:36,839 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:36,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:28:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:28:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-04-06 20:28:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 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 20:28:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-04-06 20:28:36,848 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2022-04-06 20:28:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:36,849 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-04-06 20:28:36,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-04-06 20:28:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:28:36,849 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:36,849 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:36,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 20:28:37,050 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,SelfDestructingSolverStorable26 [2022-04-06 20:28:37,050 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:37,051 INFO L85 PathProgramCache]: Analyzing trace with hash 728206337, now seen corresponding path program 49 times [2022-04-06 20:28:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:37,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1688850838] [2022-04-06 20:28:37,052 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:37,052 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:37,052 INFO L85 PathProgramCache]: Analyzing trace with hash 728206337, now seen corresponding path program 50 times [2022-04-06 20:28:37,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:37,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92247835] [2022-04-06 20:28:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:37,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:37,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 51 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:37,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:37,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92247835] [2022-04-06 20:28:37,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92247835] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:37,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886495485] [2022-04-06 20:28:37,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:37,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:37,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:37,468 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 20:28:37,469 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 20:28:37,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:37,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:37,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:37,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-04-06 20:28:37,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-04-06 20:28:37,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886495485] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:37,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:37,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 6, 6] total 35 [2022-04-06 20:28:37,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:37,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1688850838] [2022-04-06 20:28:37,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1688850838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:37,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:37,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:28:37,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061268966] [2022-04-06 20:28:37,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:37,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:28:37,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:28:37,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1094, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:28:37,911 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 20:28:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:38,873 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-04-06 20:28:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:28:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 20:28:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:38,874 INFO L225 Difference]: With dead ends: 103 [2022-04-06 20:28:38,874 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 20:28:38,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=3410, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:28:38,875 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:38,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 74 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:28:38,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 20:28:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-04-06 20:28:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2022-04-06 20:28:38,885 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2022-04-06 20:28:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:38,885 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2022-04-06 20:28:38,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 20:28:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2022-04-06 20:28:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 20:28:38,885 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:38,886 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:38,903 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 20:28:39,090 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,SelfDestructingSolverStorable27 [2022-04-06 20:28:39,091 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:39,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1988027189, now seen corresponding path program 51 times [2022-04-06 20:28:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:39,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [183996632] [2022-04-06 20:28:39,092 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:39,093 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:39,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1988027189, now seen corresponding path program 52 times [2022-04-06 20:28:39,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:39,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793850743] [2022-04-06 20:28:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:39,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:39,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:39,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793850743] [2022-04-06 20:28:39,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793850743] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762757358] [2022-04-06 20:28:39,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:39,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:39,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:39,516 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 20:28:39,516 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 20:28:39,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:39,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2022-04-06 20:28:39,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2022-04-06 20:28:39,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762757358] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:39,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:39,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 6, 6] total 36 [2022-04-06 20:28:39,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:39,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [183996632] [2022-04-06 20:28:39,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [183996632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:39,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:39,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:28:39,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695119486] [2022-04-06 20:28:39,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:39,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:28:39,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:39,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:28:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:28:39,924 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:40,944 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-04-06 20:28:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:28:40,944 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-04-06 20:28:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:40,944 INFO L225 Difference]: With dead ends: 106 [2022-04-06 20:28:40,944 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 20:28:40,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=3647, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:28:40,946 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:40,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 94 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2154 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:28:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 20:28:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-04-06 20:28:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 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 20:28:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-04-06 20:28:40,956 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2022-04-06 20:28:40,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:40,956 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-04-06 20:28:40,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:40,956 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-04-06 20:28:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:28:40,957 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:40,957 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:40,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 20:28:41,157 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,SelfDestructingSolverStorable28 [2022-04-06 20:28:41,157 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash 177823681, now seen corresponding path program 53 times [2022-04-06 20:28:41,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:41,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1933848962] [2022-04-06 20:28:41,159 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:41,159 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:41,159 INFO L85 PathProgramCache]: Analyzing trace with hash 177823681, now seen corresponding path program 54 times [2022-04-06 20:28:41,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:41,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417261175] [2022-04-06 20:28:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:41,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:41,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 55 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:41,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:41,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417261175] [2022-04-06 20:28:41,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417261175] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:41,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49881723] [2022-04-06 20:28:41,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:41,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:41,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:41,568 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 20:28:41,569 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 20:28:41,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:41,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:41,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-04-06 20:28:41,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-04-06 20:28:41,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49881723] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:41,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:41,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 6, 6] total 37 [2022-04-06 20:28:41,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1933848962] [2022-04-06 20:28:41,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1933848962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:41,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:41,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:28:41,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928666000] [2022-04-06 20:28:41,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:41,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:28:41,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:28:41,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:28:41,978 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 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 20:28:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:43,055 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-04-06 20:28:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:28:43,055 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 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 20:28:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:43,063 INFO L225 Difference]: With dead ends: 109 [2022-04-06 20:28:43,063 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 20:28:43,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=3892, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:28:43,065 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:43,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 64 Invalid, 2335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:28:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 20:28:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-04-06 20:28:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-04-06 20:28:43,077 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2022-04-06 20:28:43,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:43,077 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-04-06 20:28:43,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 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 20:28:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-04-06 20:28:43,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 20:28:43,077 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:43,077 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:43,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 20:28:43,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:43,291 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:43,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash -252595957, now seen corresponding path program 55 times [2022-04-06 20:28:43,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:43,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1878619185] [2022-04-06 20:28:43,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:43,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:43,293 INFO L85 PathProgramCache]: Analyzing trace with hash -252595957, now seen corresponding path program 56 times [2022-04-06 20:28:43,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:43,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328927656] [2022-04-06 20:28:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:43,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:43,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 57 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:43,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:43,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328927656] [2022-04-06 20:28:43,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328927656] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:43,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283061172] [2022-04-06 20:28:43,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:43,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:43,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:43,725 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 20:28:43,726 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 20:28:43,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:43,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:43,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:28:43,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:28:44,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283061172] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:44,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:44,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 6, 6] total 38 [2022-04-06 20:28:44,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:44,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1878619185] [2022-04-06 20:28:44,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1878619185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:44,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:44,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:28:44,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235762284] [2022-04-06 20:28:44,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:44,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:28:44,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:44,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:28:44,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:28:44,164 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:45,333 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-04-06 20:28:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:28:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-04-06 20:28:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:45,334 INFO L225 Difference]: With dead ends: 112 [2022-04-06 20:28:45,334 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 20:28:45,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=277, Invalid=4145, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:28:45,335 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:45,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 109 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:28:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 20:28:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-04-06 20:28:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 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 20:28:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-04-06 20:28:45,346 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2022-04-06 20:28:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:45,346 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-04-06 20:28:45,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-04-06 20:28:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:28:45,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:45,346 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:45,362 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 20:28:45,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:45,551 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1888314241, now seen corresponding path program 57 times [2022-04-06 20:28:45,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:45,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [680727988] [2022-04-06 20:28:45,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:45,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:45,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1888314241, now seen corresponding path program 58 times [2022-04-06 20:28:45,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:45,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054178243] [2022-04-06 20:28:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:45,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:46,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 59 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:46,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:46,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054178243] [2022-04-06 20:28:46,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054178243] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:46,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684836318] [2022-04-06 20:28:46,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:46,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:46,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:46,076 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 20:28:46,077 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 20:28:46,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:46,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:46,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2022-04-06 20:28:46,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2022-04-06 20:28:46,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684836318] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:46,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:46,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 6, 6] total 39 [2022-04-06 20:28:46,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:46,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [680727988] [2022-04-06 20:28:46,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [680727988] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:46,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:46,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:28:46,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445386589] [2022-04-06 20:28:46,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:46,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:28:46,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:46,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:28:46,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:28:46,539 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 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 20:28:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:47,763 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-04-06 20:28:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:28:47,763 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 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 20:28:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:47,763 INFO L225 Difference]: With dead ends: 115 [2022-04-06 20:28:47,764 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 20:28:47,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=4406, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:28:47,764 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:47,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 49 Invalid, 2659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:28:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 20:28:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-04-06 20:28:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2022-04-06 20:28:47,776 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2022-04-06 20:28:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:47,776 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2022-04-06 20:28:47,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 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 20:28:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2022-04-06 20:28:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 20:28:47,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:47,777 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:47,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 20:28:47,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:47,980 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:47,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:47,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1479677259, now seen corresponding path program 59 times [2022-04-06 20:28:47,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:47,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1528783371] [2022-04-06 20:28:47,982 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:47,982 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1479677259, now seen corresponding path program 60 times [2022-04-06 20:28:47,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:47,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88203746] [2022-04-06 20:28:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:47,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:48,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 61 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:48,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:48,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88203746] [2022-04-06 20:28:48,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88203746] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:48,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457482941] [2022-04-06 20:28:48,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:48,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:48,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:48,464 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 20:28:48,465 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 20:28:48,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:48,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:48,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:48,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2022-04-06 20:28:48,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2022-04-06 20:28:48,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457482941] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:48,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:48,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 6, 6] total 40 [2022-04-06 20:28:48,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:48,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1528783371] [2022-04-06 20:28:48,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1528783371] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:48,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:48,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:28:48,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510356694] [2022-04-06 20:28:48,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:48,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:28:48,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:28:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:28:48,918 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:50,222 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-04-06 20:28:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:28:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-04-06 20:28:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:50,223 INFO L225 Difference]: With dead ends: 118 [2022-04-06 20:28:50,223 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 20:28:50,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=4675, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:28:50,224 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:50,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 114 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2854 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:28:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 20:28:50,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-04-06 20:28:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 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 20:28:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-04-06 20:28:50,236 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2022-04-06 20:28:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:50,236 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-04-06 20:28:50,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-04-06 20:28:50,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:28:50,237 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:50,237 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:50,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:50,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-04-06 20:28:50,437 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:50,438 INFO L85 PathProgramCache]: Analyzing trace with hash -287336639, now seen corresponding path program 61 times [2022-04-06 20:28:50,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:50,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1530000520] [2022-04-06 20:28:50,439 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:50,439 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:50,439 INFO L85 PathProgramCache]: Analyzing trace with hash -287336639, now seen corresponding path program 62 times [2022-04-06 20:28:50,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:50,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406064638] [2022-04-06 20:28:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:50,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:50,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 63 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:50,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:50,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406064638] [2022-04-06 20:28:50,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406064638] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:50,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143910583] [2022-04-06 20:28:50,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:50,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:50,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:50,980 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 20:28:51,005 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 20:28:51,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:51,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:51,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:51,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-04-06 20:28:51,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-04-06 20:28:51,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143910583] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:51,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:51,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 6, 6] total 41 [2022-04-06 20:28:51,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:51,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1530000520] [2022-04-06 20:28:51,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1530000520] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:51,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:51,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:28:51,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562278657] [2022-04-06 20:28:51,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:51,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:28:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:51,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:28:51,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:28:51,475 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 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 20:28:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:52,871 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-04-06 20:28:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:28:52,872 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 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 20:28:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:52,872 INFO L225 Difference]: With dead ends: 121 [2022-04-06 20:28:52,872 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 20:28:52,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=304, Invalid=4952, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:28:52,873 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3038 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:52,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 114 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3038 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:28:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 20:28:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-04-06 20:28:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-04-06 20:28:52,885 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2022-04-06 20:28:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:52,886 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-04-06 20:28:52,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 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 20:28:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-04-06 20:28:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 20:28:52,886 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:52,886 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:52,904 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 20:28:53,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:53,088 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2015775115, now seen corresponding path program 63 times [2022-04-06 20:28:53,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:53,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [230173525] [2022-04-06 20:28:53,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:53,090 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2015775115, now seen corresponding path program 64 times [2022-04-06 20:28:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:53,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095666821] [2022-04-06 20:28:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:53,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 65 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:53,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:53,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095666821] [2022-04-06 20:28:53,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095666821] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:53,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296788955] [2022-04-06 20:28:53,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:53,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:53,669 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 20:28:53,670 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 20:28:53,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:53,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:53,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:53,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2022-04-06 20:28:53,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2022-04-06 20:28:54,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296788955] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:54,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:54,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 6, 6] total 42 [2022-04-06 20:28:54,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:54,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [230173525] [2022-04-06 20:28:54,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [230173525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:54,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:54,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:28:54,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894046032] [2022-04-06 20:28:54,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:54,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:28:54,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:54,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:28:54,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:28:54,160 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:55,589 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-04-06 20:28:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:28:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-04-06 20:28:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:55,590 INFO L225 Difference]: With dead ends: 124 [2022-04-06 20:28:55,590 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 20:28:55,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=5237, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:28:55,591 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 3114 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:55,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 3114 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:28:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 20:28:55,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-04-06 20:28:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 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 20:28:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2022-04-06 20:28:55,604 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2022-04-06 20:28:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:55,604 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2022-04-06 20:28:55,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2022-04-06 20:28:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:28:55,605 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:55,605 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:55,621 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 20:28:55,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:55,809 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:55,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1915484929, now seen corresponding path program 65 times [2022-04-06 20:28:55,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:55,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [241419591] [2022-04-06 20:28:55,811 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:55,811 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:55,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1915484929, now seen corresponding path program 66 times [2022-04-06 20:28:55,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:55,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579687573] [2022-04-06 20:28:55,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:55,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:56,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 67 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:56,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:56,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579687573] [2022-04-06 20:28:56,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579687573] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:56,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884473117] [2022-04-06 20:28:56,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:56,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:56,397 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 20:28:56,400 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 20:28:56,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:56,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:56,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:56,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-04-06 20:28:56,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-04-06 20:28:56,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884473117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:56,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:56,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 6, 6] total 43 [2022-04-06 20:28:56,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:56,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [241419591] [2022-04-06 20:28:56,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [241419591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:56,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:56,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:28:56,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853782814] [2022-04-06 20:28:56,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:56,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:28:56,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:28:56,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1686, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:28:56,906 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 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 20:28:58,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:58,492 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-04-06 20:28:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:28:58,492 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 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 20:28:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:58,493 INFO L225 Difference]: With dead ends: 127 [2022-04-06 20:28:58,493 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 20:28:58,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=322, Invalid=5530, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:28:58,494 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3484 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:58,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 164 Invalid, 3553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3484 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:28:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 20:28:58,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-04-06 20:28:58,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2022-04-06 20:28:58,508 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2022-04-06 20:28:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:58,508 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2022-04-06 20:28:58,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 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 20:28:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2022-04-06 20:28:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 20:28:58,509 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:58,509 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:58,526 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 20:28:58,710 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,SelfDestructingSolverStorable35 [2022-04-06 20:28:58,711 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash -827175477, now seen corresponding path program 67 times [2022-04-06 20:28:58,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:58,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1747185271] [2022-04-06 20:28:58,712 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:58,712 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:58,713 INFO L85 PathProgramCache]: Analyzing trace with hash -827175477, now seen corresponding path program 68 times [2022-04-06 20:28:58,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:58,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673648001] [2022-04-06 20:28:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:58,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:59,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:59,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:59,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673648001] [2022-04-06 20:28:59,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673648001] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:59,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836023167] [2022-04-06 20:28:59,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:59,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:59,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:59,404 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 20:28:59,405 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 20:28:59,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:59,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:59,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:28:59,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-04-06 20:28:59,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-04-06 20:28:59,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836023167] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:59,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:59,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 6, 6] total 44 [2022-04-06 20:28:59,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:59,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1747185271] [2022-04-06 20:28:59,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1747185271] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:59,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:59,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:28:59,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642699562] [2022-04-06 20:28:59,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:59,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:28:59,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:59,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:28:59,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:28:59,930 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:01,560 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-04-06 20:29:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:29:01,560 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-04-06 20:29:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:01,561 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:29:01,561 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 20:29:01,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=331, Invalid=5831, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:29:01,562 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3620 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 3691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:01,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 109 Invalid, 3691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3620 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:29:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 20:29:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-04-06 20:29:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 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 20:29:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-04-06 20:29:01,576 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2022-04-06 20:29:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:01,577 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-04-06 20:29:01,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-04-06 20:29:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:29:01,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:01,577 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:01,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 20:29:01,786 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,SelfDestructingSolverStorable36 [2022-04-06 20:29:01,786 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:01,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash 34508481, now seen corresponding path program 69 times [2022-04-06 20:29:01,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:01,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1173985048] [2022-04-06 20:29:01,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:01,788 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash 34508481, now seen corresponding path program 70 times [2022-04-06 20:29:01,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:01,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002893496] [2022-04-06 20:29:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:01,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:02,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 71 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:02,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002893496] [2022-04-06 20:29:02,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002893496] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133522579] [2022-04-06 20:29:02,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:02,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:02,431 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 20:29:02,463 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 20:29:02,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:02,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:02,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:02,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2022-04-06 20:29:02,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2022-04-06 20:29:02,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133522579] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:02,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:02,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 6, 6] total 45 [2022-04-06 20:29:02,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:02,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1173985048] [2022-04-06 20:29:02,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1173985048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:02,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:02,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:29:02,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494090281] [2022-04-06 20:29:02,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:02,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:29:02,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:02,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:29:02,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:29:02,973 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 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 20:29:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:04,758 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2022-04-06 20:29:04,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:29:04,759 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 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 20:29:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:04,759 INFO L225 Difference]: With dead ends: 133 [2022-04-06 20:29:04,759 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 20:29:04,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=340, Invalid=6140, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:29:04,760 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3864 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 3937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:04,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 139 Invalid, 3937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3864 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:29:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 20:29:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-04-06 20:29:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-04-06 20:29:04,775 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2022-04-06 20:29:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:04,776 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-04-06 20:29:04,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 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 20:29:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-04-06 20:29:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 20:29:04,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:04,776 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:04,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 20:29:04,991 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,SelfDestructingSolverStorable37 [2022-04-06 20:29:04,991 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash -558226933, now seen corresponding path program 71 times [2022-04-06 20:29:04,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:04,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1718279784] [2022-04-06 20:29:04,993 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:04,993 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:04,993 INFO L85 PathProgramCache]: Analyzing trace with hash -558226933, now seen corresponding path program 72 times [2022-04-06 20:29:04,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:04,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504657579] [2022-04-06 20:29:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:04,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:05,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 73 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:05,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504657579] [2022-04-06 20:29:05,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504657579] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38392439] [2022-04-06 20:29:05,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:05,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:05,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:05,633 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 20:29:05,634 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 20:29:05,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:29:05,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:05,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:05,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2022-04-06 20:29:05,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2022-04-06 20:29:06,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38392439] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:06,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:06,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 6, 6] total 46 [2022-04-06 20:29:06,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:06,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1718279784] [2022-04-06 20:29:06,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1718279784] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:06,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:06,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:29:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460324105] [2022-04-06 20:29:06,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:06,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:29:06,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:29:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:29:06,186 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:07,966 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-04-06 20:29:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:29:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-04-06 20:29:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:07,967 INFO L225 Difference]: With dead ends: 136 [2022-04-06 20:29:07,967 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 20:29:07,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=349, Invalid=6457, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:29:07,968 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4048 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 4123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 4048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:07,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 114 Invalid, 4123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 4048 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:29:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 20:29:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-04-06 20:29:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 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 20:29:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2022-04-06 20:29:07,998 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2022-04-06 20:29:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:07,998 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2022-04-06 20:29:07,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2022-04-06 20:29:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:29:07,998 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:07,999 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:08,014 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 20:29:08,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:29:08,207 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:08,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2128391551, now seen corresponding path program 73 times [2022-04-06 20:29:08,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:08,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975369481] [2022-04-06 20:29:08,209 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:08,209 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2128391551, now seen corresponding path program 74 times [2022-04-06 20:29:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:08,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318968703] [2022-04-06 20:29:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:08,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:08,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 75 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:08,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318968703] [2022-04-06 20:29:08,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318968703] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660903099] [2022-04-06 20:29:08,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:08,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:08,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:08,899 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 20:29:08,899 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 20:29:08,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:08,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:08,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:08,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2022-04-06 20:29:09,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2022-04-06 20:29:09,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660903099] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:09,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:09,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 6, 6] total 47 [2022-04-06 20:29:09,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:09,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975369481] [2022-04-06 20:29:09,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975369481] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:09,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:09,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:29:09,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823949225] [2022-04-06 20:29:09,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:09,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:29:09,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:09,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:29:09,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2030, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:29:09,446 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 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 20:29:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:11,375 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2022-04-06 20:29:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:29:11,376 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 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 20:29:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:11,376 INFO L225 Difference]: With dead ends: 139 [2022-04-06 20:29:11,376 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 20:29:11,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=358, Invalid=6782, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:29:11,377 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 4328 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 4405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:11,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 164 Invalid, 4405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4328 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:29:11,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 20:29:11,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-04-06 20:29:11,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-04-06 20:29:11,393 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2022-04-06 20:29:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:11,393 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-04-06 20:29:11,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 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 20:29:11,393 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-04-06 20:29:11,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 20:29:11,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:11,394 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:11,410 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 20:29:11,594 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,SelfDestructingSolverStorable39 [2022-04-06 20:29:11,594 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:11,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1881261643, now seen corresponding path program 75 times [2022-04-06 20:29:11,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:11,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [150381614] [2022-04-06 20:29:11,596 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:11,596 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1881261643, now seen corresponding path program 76 times [2022-04-06 20:29:11,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:11,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056871839] [2022-04-06 20:29:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:11,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:12,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 77 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:12,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:12,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056871839] [2022-04-06 20:29:12,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056871839] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:12,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191669384] [2022-04-06 20:29:12,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:12,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:12,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:12,283 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 20:29:12,283 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 20:29:12,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:12,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:12,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:12,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2022-04-06 20:29:12,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2022-04-06 20:29:12,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191669384] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:12,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:12,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 6, 6] total 48 [2022-04-06 20:29:12,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [150381614] [2022-04-06 20:29:12,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [150381614] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:12,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:12,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:29:12,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258511999] [2022-04-06 20:29:12,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:12,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:29:12,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:12,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:29:12,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2121, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:29:12,853 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:14,799 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-04-06 20:29:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:29:14,800 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-04-06 20:29:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:14,800 INFO L225 Difference]: With dead ends: 142 [2022-04-06 20:29:14,800 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 20:29:14,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 252 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=7115, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:29:14,801 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4452 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 4531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 4452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:14,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 79 Invalid, 4531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 4452 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:29:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 20:29:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-04-06 20:29:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0234375) internal successors, (131), 128 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 20:29:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-04-06 20:29:14,826 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2022-04-06 20:29:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:14,826 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-04-06 20:29:14,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-04-06 20:29:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 20:29:14,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:14,827 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:14,843 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 20:29:15,042 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,SelfDestructingSolverStorable40 [2022-04-06 20:29:15,043 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:15,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1829127745, now seen corresponding path program 77 times [2022-04-06 20:29:15,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:15,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1295050355] [2022-04-06 20:29:15,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:15,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:15,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1829127745, now seen corresponding path program 78 times [2022-04-06 20:29:15,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:15,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659617808] [2022-04-06 20:29:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:15,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:15,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 79 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:15,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:15,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659617808] [2022-04-06 20:29:15,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659617808] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890629925] [2022-04-06 20:29:15,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:15,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:15,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:15,763 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 20:29:15,763 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 20:29:15,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:29:15,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:15,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2022-04-06 20:29:16,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2022-04-06 20:29:16,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890629925] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:16,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:16,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 6, 6] total 49 [2022-04-06 20:29:16,346 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:16,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1295050355] [2022-04-06 20:29:16,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1295050355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:16,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:16,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:29:16,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953524017] [2022-04-06 20:29:16,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:16,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:29:16,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:16,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:29:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:29:16,347 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 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 20:29:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:18,400 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2022-04-06 20:29:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:29:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 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 20:29:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:18,401 INFO L225 Difference]: With dead ends: 145 [2022-04-06 20:29:18,401 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 20:29:18,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=376, Invalid=7456, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:29:18,402 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4732 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 4813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:18,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 119 Invalid, 4813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4732 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:29:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 20:29:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-04-06 20:29:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-04-06 20:29:18,419 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2022-04-06 20:29:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:18,419 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-04-06 20:29:18,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 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 20:29:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-04-06 20:29:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 20:29:18,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:18,419 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:18,435 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 20:29:18,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 20:29:18,635 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash -808633717, now seen corresponding path program 79 times [2022-04-06 20:29:18,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:18,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1470047012] [2022-04-06 20:29:18,637 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:18,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash -808633717, now seen corresponding path program 80 times [2022-04-06 20:29:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:18,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496978897] [2022-04-06 20:29:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:18,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:19,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 81 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:19,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:19,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496978897] [2022-04-06 20:29:19,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496978897] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:19,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137129665] [2022-04-06 20:29:19,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:19,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:19,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:19,388 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 20:29:19,388 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 20:29:19,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:19,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2022-04-06 20:29:19,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2022-04-06 20:29:19,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137129665] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:19,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:19,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 6, 6] total 50 [2022-04-06 20:29:19,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:19,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1470047012] [2022-04-06 20:29:19,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1470047012] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:19,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:19,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:29:19,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739613607] [2022-04-06 20:29:19,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:19,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:29:19,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:29:19,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2309, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:29:19,984 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:22,134 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-04-06 20:29:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:29:22,134 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-04-06 20:29:22,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:22,135 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:29:22,135 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:29:22,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=385, Invalid=7805, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:29:22,136 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4934 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 5017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:22,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 89 Invalid, 5017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 4934 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:29:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:29:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-04-06 20:29:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 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 20:29:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2022-04-06 20:29:22,154 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2022-04-06 20:29:22,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:22,154 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2022-04-06 20:29:22,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:22,155 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2022-04-06 20:29:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 20:29:22,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:22,156 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:22,174 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 20:29:22,371 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,SelfDestructingSolverStorable42 [2022-04-06 20:29:22,371 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:22,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1638700543, now seen corresponding path program 81 times [2022-04-06 20:29:22,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:22,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1981713398] [2022-04-06 20:29:22,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:22,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:22,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1638700543, now seen corresponding path program 82 times [2022-04-06 20:29:22,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:22,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277382091] [2022-04-06 20:29:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:22,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:23,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 83 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:23,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:23,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277382091] [2022-04-06 20:29:23,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277382091] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:23,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924850913] [2022-04-06 20:29:23,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:23,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:23,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:23,149 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 20:29:23,152 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 20:29:23,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:23,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:23,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:23,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2022-04-06 20:29:23,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2022-04-06 20:29:23,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924850913] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:23,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:23,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 6, 6] total 51 [2022-04-06 20:29:23,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:23,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1981713398] [2022-04-06 20:29:23,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1981713398] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:23,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:23,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:29:23,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869425928] [2022-04-06 20:29:23,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:23,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:29:23,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:23,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:29:23,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:29:23,730 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 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 20:29:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:25,968 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-04-06 20:29:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:29:25,968 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 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 20:29:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:25,969 INFO L225 Difference]: With dead ends: 151 [2022-04-06 20:29:25,969 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 20:29:25,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 270 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=394, Invalid=8162, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:29:25,970 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 5214 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 5299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 5214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:25,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 119 Invalid, 5299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 5214 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:29:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 20:29:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-04-06 20:29:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-04-06 20:29:25,988 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2022-04-06 20:29:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:25,988 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-04-06 20:29:25,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 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 20:29:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-04-06 20:29:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-04-06 20:29:25,989 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:25,989 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:26,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 20:29:26,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:26,190 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:26,190 INFO L85 PathProgramCache]: Analyzing trace with hash 262176459, now seen corresponding path program 83 times [2022-04-06 20:29:26,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:26,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [938191219] [2022-04-06 20:29:26,192 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:26,192 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash 262176459, now seen corresponding path program 84 times [2022-04-06 20:29:26,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:26,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31195187] [2022-04-06 20:29:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:26,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:26,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 85 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:26,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:26,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31195187] [2022-04-06 20:29:26,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31195187] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:26,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247973346] [2022-04-06 20:29:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:26,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:26,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:26,995 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 20:29:26,996 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 20:29:27,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:29:27,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:27,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2022-04-06 20:29:27,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2022-04-06 20:29:27,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247973346] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:27,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:27,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 6, 6] total 52 [2022-04-06 20:29:27,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [938191219] [2022-04-06 20:29:27,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [938191219] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:27,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:27,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:29:27,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339848628] [2022-04-06 20:29:27,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:27,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:29:27,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:29:27,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2505, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:29:27,581 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:29,935 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2022-04-06 20:29:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:29:29,935 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-04-06 20:29:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:29,936 INFO L225 Difference]: With dead ends: 154 [2022-04-06 20:29:29,936 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 20:29:29,936 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 276 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=403, Invalid=8527, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:29:29,936 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5542 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 5629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 5542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:29,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 184 Invalid, 5629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 5542 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:29:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 20:29:29,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-04-06 20:29:29,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 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 20:29:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-04-06 20:29:29,956 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2022-04-06 20:29:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:29,956 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-04-06 20:29:29,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-04-06 20:29:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:29:29,956 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:29,956 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:29,972 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 20:29:30,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:30,167 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:30,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:30,168 INFO L85 PathProgramCache]: Analyzing trace with hash 145145281, now seen corresponding path program 85 times [2022-04-06 20:29:30,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:30,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1087550334] [2022-04-06 20:29:30,169 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:30,169 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:30,169 INFO L85 PathProgramCache]: Analyzing trace with hash 145145281, now seen corresponding path program 86 times [2022-04-06 20:29:30,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:30,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081432875] [2022-04-06 20:29:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:30,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 87 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:31,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:31,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081432875] [2022-04-06 20:29:31,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081432875] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:31,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075181680] [2022-04-06 20:29:31,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:31,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:31,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:31,004 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 20:29:31,005 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 20:29:31,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:31,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:31,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2022-04-06 20:29:31,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2022-04-06 20:29:31,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075181680] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:31,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:31,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 6, 6] total 53 [2022-04-06 20:29:31,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:31,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1087550334] [2022-04-06 20:29:31,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1087550334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:31,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:31,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:29:31,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844666679] [2022-04-06 20:29:31,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:31,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:29:31,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:29:31,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2606, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:29:31,612 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 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 20:29:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:34,086 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2022-04-06 20:29:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:29:34,086 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 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 20:29:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:34,087 INFO L225 Difference]: With dead ends: 157 [2022-04-06 20:29:34,087 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 20:29:34,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=412, Invalid=8900, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:29:34,088 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 5852 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 5941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 5852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:34,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 229 Invalid, 5941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 5852 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:29:34,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 20:29:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-04-06 20:29:34,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-04-06 20:29:34,107 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2022-04-06 20:29:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:34,107 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-04-06 20:29:34,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 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 20:29:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-04-06 20:29:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 20:29:34,108 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:34,108 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:34,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 20:29:34,308 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,SelfDestructingSolverStorable45 [2022-04-06 20:29:34,309 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:34,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1182765835, now seen corresponding path program 87 times [2022-04-06 20:29:34,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:34,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1880930092] [2022-04-06 20:29:34,310 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:34,310 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1182765835, now seen corresponding path program 88 times [2022-04-06 20:29:34,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:34,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630114516] [2022-04-06 20:29:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:34,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:35,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 89 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:35,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:35,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630114516] [2022-04-06 20:29:35,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630114516] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:35,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445479718] [2022-04-06 20:29:35,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:35,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:35,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:35,182 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 20:29:35,182 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 20:29:35,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:35,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:35,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:35,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2022-04-06 20:29:35,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2022-04-06 20:29:35,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445479718] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:35,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:35,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 6, 6] total 54 [2022-04-06 20:29:35,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:35,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1880930092] [2022-04-06 20:29:35,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1880930092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:35,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:35,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:29:35,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889757011] [2022-04-06 20:29:35,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:35,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:29:35,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:35,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:29:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:29:35,810 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:38,410 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-04-06 20:29:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:29:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-04-06 20:29:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:38,411 INFO L225 Difference]: With dead ends: 160 [2022-04-06 20:29:38,411 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 20:29:38,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=421, Invalid=9281, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:29:38,412 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 5952 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 6043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 5952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:38,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 94 Invalid, 6043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 5952 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:29:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 20:29:38,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-04-06 20:29:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 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 20:29:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2022-04-06 20:29:38,432 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2022-04-06 20:29:38,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:38,432 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2022-04-06 20:29:38,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:38,432 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2022-04-06 20:29:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 20:29:38,433 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:38,433 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:38,452 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 20:29:38,648 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,SelfDestructingSolverStorable46 [2022-04-06 20:29:38,649 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:38,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2057060737, now seen corresponding path program 89 times [2022-04-06 20:29:38,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:38,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282403297] [2022-04-06 20:29:38,650 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:38,650 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2057060737, now seen corresponding path program 90 times [2022-04-06 20:29:38,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:38,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720412741] [2022-04-06 20:29:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:38,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:39,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 91 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:39,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:39,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720412741] [2022-04-06 20:29:39,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720412741] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964167276] [2022-04-06 20:29:39,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:39,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:39,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:39,535 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 20:29:39,535 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 20:29:39,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:29:39,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:39,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2022-04-06 20:29:39,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2022-04-06 20:29:40,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964167276] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:40,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:40,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 6, 6] total 55 [2022-04-06 20:29:40,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282403297] [2022-04-06 20:29:40,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282403297] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:40,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:40,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:29:40,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767700634] [2022-04-06 20:29:40,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:40,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:29:40,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:40,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:29:40,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2814, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:29:40,155 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 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 20:29:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:42,854 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2022-04-06 20:29:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:29:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 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 20:29:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:42,855 INFO L225 Difference]: With dead ends: 163 [2022-04-06 20:29:42,855 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 20:29:42,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=430, Invalid=9670, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:29:42,856 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6304 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 6397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 6304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:42,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 164 Invalid, 6397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 6304 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:29:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 20:29:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-04-06 20:29:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2022-04-06 20:29:42,882 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2022-04-06 20:29:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:42,887 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2022-04-06 20:29:42,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 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 20:29:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2022-04-06 20:29:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-04-06 20:29:42,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:42,888 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:42,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:43,103 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,SelfDestructingSolverStorable47 [2022-04-06 20:29:43,103 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:43,104 INFO L85 PathProgramCache]: Analyzing trace with hash -800164021, now seen corresponding path program 91 times [2022-04-06 20:29:43,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1012886254] [2022-04-06 20:29:43,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:43,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash -800164021, now seen corresponding path program 92 times [2022-04-06 20:29:43,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:43,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003802695] [2022-04-06 20:29:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:43,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:43,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:44,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:44,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003802695] [2022-04-06 20:29:44,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003802695] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:44,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173770175] [2022-04-06 20:29:44,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:44,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:44,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:44,008 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 20:29:44,009 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 20:29:44,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:44,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:44,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2022-04-06 20:29:44,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2022-04-06 20:29:44,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173770175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:44,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:44,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 6, 6] total 56 [2022-04-06 20:29:44,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:44,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1012886254] [2022-04-06 20:29:44,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1012886254] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:44,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:44,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:29:44,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183923104] [2022-04-06 20:29:44,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:44,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:29:44,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:29:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2921, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:29:44,656 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:47,428 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-04-06 20:29:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:29:47,428 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-04-06 20:29:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:47,429 INFO L225 Difference]: With dead ends: 166 [2022-04-06 20:29:47,429 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 20:29:47,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=439, Invalid=10067, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:29:47,430 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 6542 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 6637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 6542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:47,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 134 Invalid, 6637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 6542 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:29:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 20:29:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-04-06 20:29:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 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 20:29:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-04-06 20:29:47,465 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2022-04-06 20:29:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:47,465 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-04-06 20:29:47,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-04-06 20:29:47,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 20:29:47,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:47,465 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:47,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-06 20:29:47,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:47,666 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:47,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:47,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1573909825, now seen corresponding path program 93 times [2022-04-06 20:29:47,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:47,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2003510308] [2022-04-06 20:29:47,667 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:47,668 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:47,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1573909825, now seen corresponding path program 94 times [2022-04-06 20:29:47,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:47,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873961334] [2022-04-06 20:29:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:47,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:48,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 95 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:48,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:48,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873961334] [2022-04-06 20:29:48,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873961334] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:48,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540834991] [2022-04-06 20:29:48,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:48,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:48,632 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 20:29:48,633 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 20:29:48,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:48,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:48,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2022-04-06 20:29:48,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2022-04-06 20:29:49,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540834991] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:49,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:49,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 6, 6] total 57 [2022-04-06 20:29:49,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:49,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2003510308] [2022-04-06 20:29:49,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2003510308] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:49,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:49,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:29:49,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106521856] [2022-04-06 20:29:49,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:49,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:29:49,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:29:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=3030, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:29:49,293 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 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 20:29:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:52,224 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2022-04-06 20:29:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:29:52,224 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 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 20:29:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:52,225 INFO L225 Difference]: With dead ends: 169 [2022-04-06 20:29:52,225 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 20:29:52,226 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=448, Invalid=10472, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:29:52,226 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 153 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 6948 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 7045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:52,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 239 Invalid, 7045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6948 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:29:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 20:29:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-04-06 20:29:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-04-06 20:29:52,255 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2022-04-06 20:29:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:52,255 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-04-06 20:29:52,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 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 20:29:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-04-06 20:29:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-04-06 20:29:52,256 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:52,256 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:52,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 20:29:52,467 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,SelfDestructingSolverStorable49 [2022-04-06 20:29:52,467 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1913574517, now seen corresponding path program 95 times [2022-04-06 20:29:52,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:52,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1199195594] [2022-04-06 20:29:52,469 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:52,469 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:52,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1913574517, now seen corresponding path program 96 times [2022-04-06 20:29:52,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:52,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840834331] [2022-04-06 20:29:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:52,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:53,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 97 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:53,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840834331] [2022-04-06 20:29:53,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840834331] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98229339] [2022-04-06 20:29:53,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:53,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:53,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:53,455 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 20:29:53,456 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 20:29:53,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:29:53,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2022-04-06 20:29:53,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2022-04-06 20:29:54,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98229339] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:54,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:54,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 6, 6] total 58 [2022-04-06 20:29:54,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:54,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1199195594] [2022-04-06 20:29:54,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1199195594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:54,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:54,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:29:54,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439529291] [2022-04-06 20:29:54,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:54,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:29:54,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:54,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:29:54,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3141, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:29:54,171 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:57,216 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-04-06 20:29:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:29:57,216 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-04-06 20:29:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:57,217 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:29:57,217 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 20:29:57,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=457, Invalid=10885, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:29:57,218 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 7186 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 7285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 7186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:57,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 199 Invalid, 7285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 7186 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:29:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 20:29:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-04-06 20:29:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 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 20:29:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2022-04-06 20:29:57,251 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2022-04-06 20:29:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:57,251 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2022-04-06 20:29:57,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2022-04-06 20:29:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 20:29:57,252 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:57,252 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:57,268 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 20:29:57,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:57,452 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:57,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1994250497, now seen corresponding path program 97 times [2022-04-06 20:29:57,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:57,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [248129726] [2022-04-06 20:29:57,454 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:57,454 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1994250497, now seen corresponding path program 98 times [2022-04-06 20:29:57,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:57,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626880620] [2022-04-06 20:29:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:57,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:58,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 99 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:58,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:58,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626880620] [2022-04-06 20:29:58,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626880620] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:58,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320827642] [2022-04-06 20:29:58,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:58,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:58,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:58,471 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 20:29:58,472 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 20:29:58,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:58,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:58,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:29:58,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2022-04-06 20:29:58,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2022-04-06 20:29:59,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320827642] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:59,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:59,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 6, 6] total 59 [2022-04-06 20:29:59,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [248129726] [2022-04-06 20:29:59,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [248129726] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:59,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:59,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:29:59,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262356557] [2022-04-06 20:29:59,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:59,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:29:59,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:59,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:29:59,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3254, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:29:59,156 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 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 20:30:02,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:02,315 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2022-04-06 20:30:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:30:02,316 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 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 20:30:02,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:02,316 INFO L225 Difference]: With dead ends: 175 [2022-04-06 20:30:02,316 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 20:30:02,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=466, Invalid=11306, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:30:02,317 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 159 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7466 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 7567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 7466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:02,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 189 Invalid, 7567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 7466 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:30:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 20:30:02,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-04-06 20:30:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2022-04-06 20:30:02,341 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2022-04-06 20:30:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:02,342 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2022-04-06 20:30:02,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 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 20:30:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2022-04-06 20:30:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-04-06 20:30:02,342 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:02,342 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:02,359 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 20:30:02,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 20:30:02,555 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:02,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash 625717195, now seen corresponding path program 99 times [2022-04-06 20:30:02,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:02,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931213857] [2022-04-06 20:30:02,557 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:02,557 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash 625717195, now seen corresponding path program 100 times [2022-04-06 20:30:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:02,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485666262] [2022-04-06 20:30:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:03,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 101 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:03,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:03,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485666262] [2022-04-06 20:30:03,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485666262] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:03,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133248917] [2022-04-06 20:30:03,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:03,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:03,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:03,611 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 20:30:03,612 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 20:30:03,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:03,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:30:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2022-04-06 20:30:03,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2022-04-06 20:30:04,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133248917] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:04,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:04,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 6, 6] total 60 [2022-04-06 20:30:04,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931213857] [2022-04-06 20:30:04,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931213857] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:04,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:04,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:30:04,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079752019] [2022-04-06 20:30:04,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:04,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:30:04,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:30:04,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3369, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:30:04,316 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:07,560 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-04-06 20:30:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:30:07,560 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-04-06 20:30:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:07,563 INFO L225 Difference]: With dead ends: 178 [2022-04-06 20:30:07,563 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 20:30:07,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=475, Invalid=11735, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:30:07,564 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 7596 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 7699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 7596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:07,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 49 Invalid, 7699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 7596 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:30:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 20:30:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-04-06 20:30:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 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 20:30:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2022-04-06 20:30:07,590 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2022-04-06 20:30:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:07,590 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2022-04-06 20:30:07,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2022-04-06 20:30:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 20:30:07,591 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:07,591 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:07,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:07,791 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,SelfDestructingSolverStorable52 [2022-04-06 20:30:07,791 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:07,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1520309055, now seen corresponding path program 101 times [2022-04-06 20:30:07,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:07,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1119160835] [2022-04-06 20:30:07,793 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:07,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:07,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1520309055, now seen corresponding path program 102 times [2022-04-06 20:30:07,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:07,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458606856] [2022-04-06 20:30:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:07,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 103 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:08,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:08,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458606856] [2022-04-06 20:30:08,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458606856] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:08,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513670106] [2022-04-06 20:30:08,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:30:08,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:08,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:08,893 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 20:30:08,894 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 20:30:08,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:30:08,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:08,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:30:08,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 3927 trivial. 0 not checked. [2022-04-06 20:30:09,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 3927 trivial. 0 not checked. [2022-04-06 20:30:09,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513670106] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:09,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:09,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 6, 6] total 61 [2022-04-06 20:30:09,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:09,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1119160835] [2022-04-06 20:30:09,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1119160835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:09,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:09,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:30:09,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252043239] [2022-04-06 20:30:09,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:09,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:30:09,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:09,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:30:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3486, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:30:09,594 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 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 20:30:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:13,042 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2022-04-06 20:30:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:30:13,042 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 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 20:30:13,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:13,043 INFO L225 Difference]: With dead ends: 181 [2022-04-06 20:30:13,043 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 20:30:13,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 330 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=484, Invalid=12172, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:30:13,047 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 165 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8104 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 8209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 8104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:13,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 219 Invalid, 8209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 8104 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:30:13,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 20:30:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-04-06 20:30:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-04-06 20:30:13,074 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2022-04-06 20:30:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:13,075 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-04-06 20:30:13,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 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 20:30:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-04-06 20:30:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-04-06 20:30:13,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:13,075 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:13,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:13,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:13,276 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1094845451, now seen corresponding path program 103 times [2022-04-06 20:30:13,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:13,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1225678298] [2022-04-06 20:30:13,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:13,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:13,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1094845451, now seen corresponding path program 104 times [2022-04-06 20:30:13,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:13,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440505955] [2022-04-06 20:30:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:13,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:14,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 105 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:14,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:14,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440505955] [2022-04-06 20:30:14,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440505955] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:14,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320248287] [2022-04-06 20:30:14,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:14,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:14,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:14,410 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 20:30:14,410 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 20:30:14,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:14,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:14,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:30:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 4082 trivial. 0 not checked. [2022-04-06 20:30:14,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 4082 trivial. 0 not checked. [2022-04-06 20:30:15,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320248287] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:15,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:15,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 6, 6] total 62 [2022-04-06 20:30:15,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:15,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1225678298] [2022-04-06 20:30:15,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1225678298] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:15,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:15,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:30:15,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574859513] [2022-04-06 20:30:15,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:15,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:30:15,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:15,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:30:15,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3605, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:30:15,138 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:18,580 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-04-06 20:30:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:30:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-04-06 20:30:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:18,581 INFO L225 Difference]: With dead ends: 184 [2022-04-06 20:30:18,581 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 20:30:18,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=493, Invalid=12617, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:30:18,582 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 8240 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 8347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 8240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:18,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 74 Invalid, 8347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 8240 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:30:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 20:30:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-04-06 20:30:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 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 20:30:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2022-04-06 20:30:18,618 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2022-04-06 20:30:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:18,619 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2022-04-06 20:30:18,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2022-04-06 20:30:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:30:18,619 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:18,619 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:18,635 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 20:30:18,820 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,SelfDestructingSolverStorable54 [2022-04-06 20:30:18,820 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1544015743, now seen corresponding path program 105 times [2022-04-06 20:30:18,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:18,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1475109066] [2022-04-06 20:30:18,821 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:18,822 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1544015743, now seen corresponding path program 106 times [2022-04-06 20:30:18,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:18,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665127895] [2022-04-06 20:30:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:18,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:19,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 107 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:19,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665127895] [2022-04-06 20:30:19,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665127895] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055695711] [2022-04-06 20:30:19,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:19,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:19,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:19,982 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 20:30:19,982 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 20:30:20,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:20,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:20,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:30:20,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 4240 trivial. 0 not checked. [2022-04-06 20:30:20,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 4240 trivial. 0 not checked. [2022-04-06 20:30:20,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055695711] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:20,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:20,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 6, 6] total 63 [2022-04-06 20:30:20,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:20,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1475109066] [2022-04-06 20:30:20,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1475109066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:20,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:20,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:30:20,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792470220] [2022-04-06 20:30:20,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:20,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:30:20,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:20,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:30:20,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3726, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:30:20,723 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 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 20:30:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:24,461 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2022-04-06 20:30:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:30:24,461 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 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 20:30:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:24,467 INFO L225 Difference]: With dead ends: 187 [2022-04-06 20:30:24,467 INFO L226 Difference]: Without dead ends: 179 [2022-04-06 20:30:24,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 342 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=502, Invalid=13070, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:30:24,468 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 8646 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 8755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 8646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:24,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 149 Invalid, 8755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 8646 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:30:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-04-06 20:30:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-04-06 20:30:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0173410404624277) internal successors, (176), 173 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2022-04-06 20:30:24,495 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2022-04-06 20:30:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:24,495 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2022-04-06 20:30:24,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 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 20:30:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2022-04-06 20:30:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 20:30:24,496 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:24,496 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:24,513 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 20:30:24,708 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,SelfDestructingSolverStorable55 [2022-04-06 20:30:24,708 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash -776460213, now seen corresponding path program 107 times [2022-04-06 20:30:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:24,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1130277265] [2022-04-06 20:30:24,710 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:24,710 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash -776460213, now seen corresponding path program 108 times [2022-04-06 20:30:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:24,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450834769] [2022-04-06 20:30:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:25,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:25,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:25,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450834769] [2022-04-06 20:30:25,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450834769] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:25,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906642534] [2022-04-06 20:30:25,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:30:25,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:25,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:25,945 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 20:30:25,945 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 20:30:25,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:30:25,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:25,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:30:25,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4401 trivial. 0 not checked. [2022-04-06 20:30:26,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4401 trivial. 0 not checked. [2022-04-06 20:30:26,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906642534] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:26,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:26,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 6, 6] total 64 [2022-04-06 20:30:26,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:26,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1130277265] [2022-04-06 20:30:26,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1130277265] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:26,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:26,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:30:26,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064130460] [2022-04-06 20:30:26,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:26,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:30:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:30:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3849, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:30:26,709 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:30,452 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-04-06 20:30:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:30:30,453 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-04-06 20:30:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:30,465 INFO L225 Difference]: With dead ends: 190 [2022-04-06 20:30:30,465 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 20:30:30,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 348 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=511, Invalid=13531, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 20:30:30,466 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 174 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 9046 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 9157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 9046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:30,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 214 Invalid, 9157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 9046 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:30:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 20:30:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-04-06 20:30:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 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 20:30:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2022-04-06 20:30:30,496 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2022-04-06 20:30:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:30,496 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2022-04-06 20:30:30,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2022-04-06 20:30:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 20:30:30,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:30,497 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:30,515 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 20:30:30,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:30,712 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:30,713 INFO L85 PathProgramCache]: Analyzing trace with hash -935549887, now seen corresponding path program 109 times [2022-04-06 20:30:30,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:30,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1638510517] [2022-04-06 20:30:30,714 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:30,714 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash -935549887, now seen corresponding path program 110 times [2022-04-06 20:30:30,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:30,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061860312] [2022-04-06 20:30:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:30,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:31,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 111 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:31,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:31,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061860312] [2022-04-06 20:30:31,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061860312] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:31,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694885742] [2022-04-06 20:30:31,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:31,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:31,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:31,967 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 20:30:31,968 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 20:30:32,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:32,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:32,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:30:32,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 4565 trivial. 0 not checked. [2022-04-06 20:30:32,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 4565 trivial. 0 not checked. [2022-04-06 20:30:32,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694885742] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:32,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:32,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 6, 6] total 65 [2022-04-06 20:30:32,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:32,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1638510517] [2022-04-06 20:30:32,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1638510517] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:32,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:32,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:30:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128011036] [2022-04-06 20:30:32,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:32,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:30:32,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:30:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3974, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:30:32,747 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 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 20:30:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:36,632 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2022-04-06 20:30:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:30:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 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 20:30:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:36,633 INFO L225 Difference]: With dead ends: 193 [2022-04-06 20:30:36,633 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 20:30:36,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=520, Invalid=14000, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:30:36,634 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 177 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 9188 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 9301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 9188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:36,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 59 Invalid, 9301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 9188 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:30:36,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 20:30:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-04-06 20:30:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2022-04-06 20:30:36,664 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2022-04-06 20:30:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:36,664 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2022-04-06 20:30:36,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 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 20:30:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2022-04-06 20:30:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-04-06 20:30:36,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:36,665 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:36,682 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 20:30:36,872 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:36,872 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:36,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:36,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1267866763, now seen corresponding path program 111 times [2022-04-06 20:30:36,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:36,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [840724938] [2022-04-06 20:30:36,873 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:36,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1267866763, now seen corresponding path program 112 times [2022-04-06 20:30:36,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:36,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128272955] [2022-04-06 20:30:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:38,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 113 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:38,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:38,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128272955] [2022-04-06 20:30:38,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128272955] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:38,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093638733] [2022-04-06 20:30:38,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:38,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:38,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:38,179 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 20:30:38,180 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 20:30:38,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:38,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:38,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:30:38,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 4732 trivial. 0 not checked. [2022-04-06 20:30:38,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 4732 trivial. 0 not checked. [2022-04-06 20:30:38,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093638733] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:38,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:38,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 6, 6] total 66 [2022-04-06 20:30:38,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:38,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [840724938] [2022-04-06 20:30:38,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [840724938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:38,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:38,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:30:38,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972807671] [2022-04-06 20:30:38,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:38,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:30:38,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:30:38,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4101, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:30:38,982 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:43,067 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2022-04-06 20:30:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:30:43,068 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-04-06 20:30:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:43,068 INFO L225 Difference]: With dead ends: 196 [2022-04-06 20:30:43,069 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 20:30:43,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 360 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=529, Invalid=14477, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 20:30:43,069 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 180 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 9798 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 9913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 9798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:43,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 289 Invalid, 9913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 9798 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 20:30:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 20:30:43,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-04-06 20:30:43,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 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 20:30:43,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2022-04-06 20:30:43,099 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2022-04-06 20:30:43,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:43,099 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2022-04-06 20:30:43,099 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2022-04-06 20:30:43,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 20:30:43,100 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:43,100 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:43,131 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 20:30:43,308 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:43,308 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1026865151, now seen corresponding path program 113 times [2022-04-06 20:30:43,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:43,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [860321995] [2022-04-06 20:30:43,310 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:43,310 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:43,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1026865151, now seen corresponding path program 114 times [2022-04-06 20:30:43,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:43,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439012633] [2022-04-06 20:30:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:43,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:44,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 115 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:44,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:44,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439012633] [2022-04-06 20:30:44,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439012633] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:44,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550854219] [2022-04-06 20:30:44,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:30:44,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:44,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:44,625 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 20:30:44,626 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 20:30:44,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:30:44,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:44,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:30:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 4902 trivial. 0 not checked. [2022-04-06 20:30:45,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 4902 trivial. 0 not checked. [2022-04-06 20:30:45,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550854219] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:45,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:45,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 6, 6] total 67 [2022-04-06 20:30:45,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:45,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [860321995] [2022-04-06 20:30:45,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [860321995] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:45,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:45,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:30:45,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400478607] [2022-04-06 20:30:45,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:45,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:30:45,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:45,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:30:45,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4230, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:30:45,464 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 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 20:30:49,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:49,593 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2022-04-06 20:30:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:30:49,593 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 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 20:30:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:49,594 INFO L225 Difference]: With dead ends: 199 [2022-04-06 20:30:49,594 INFO L226 Difference]: Without dead ends: 191 [2022-04-06 20:30:49,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 366 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1661 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=538, Invalid=14962, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:30:49,595 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9850 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 9967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 9850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:49,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 49 Invalid, 9967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 9850 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 20:30:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-06 20:30:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-04-06 20:30:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0162162162162163) internal successors, (188), 185 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2022-04-06 20:30:49,625 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2022-04-06 20:30:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:49,626 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2022-04-06 20:30:49,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 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 20:30:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2022-04-06 20:30:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-04-06 20:30:49,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:49,626 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:49,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 20:30:49,835 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,SelfDestructingSolverStorable59 [2022-04-06 20:30:49,835 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:49,839 INFO L85 PathProgramCache]: Analyzing trace with hash -390864693, now seen corresponding path program 115 times [2022-04-06 20:30:49,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:49,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2093611993] [2022-04-06 20:30:49,840 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:49,840 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash -390864693, now seen corresponding path program 116 times [2022-04-06 20:30:49,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:49,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037761354] [2022-04-06 20:30:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:49,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:51,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 117 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:51,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:51,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037761354] [2022-04-06 20:30:51,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037761354] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:51,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311166897] [2022-04-06 20:30:51,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:51,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:51,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:51,329 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 20:30:51,329 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 20:30:51,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:51,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:51,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:30:51,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 5075 trivial. 0 not checked. [2022-04-06 20:30:51,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 5075 trivial. 0 not checked. [2022-04-06 20:30:52,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311166897] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:52,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:52,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 6, 6] total 68 [2022-04-06 20:30:52,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2093611993] [2022-04-06 20:30:52,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2093611993] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:52,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:52,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:30:52,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110923598] [2022-04-06 20:30:52,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:52,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:30:52,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:52,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:30:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4361, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:30:52,137 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:56,437 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2022-04-06 20:30:56,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:30:56,437 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-04-06 20:30:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:56,438 INFO L225 Difference]: With dead ends: 202 [2022-04-06 20:30:56,438 INFO L226 Difference]: Without dead ends: 194 [2022-04-06 20:30:56,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 372 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=547, Invalid=15455, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:30:56,439 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 10400 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 10519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 10400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:56,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 219 Invalid, 10519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 10400 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 20:30:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-04-06 20:30:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-04-06 20:30:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 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 20:30:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2022-04-06 20:30:56,470 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2022-04-06 20:30:56,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:56,471 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2022-04-06 20:30:56,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2022-04-06 20:30:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 20:30:56,471 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:56,471 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:56,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 20:30:56,672 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,SelfDestructingSolverStorable60 [2022-04-06 20:30:56,672 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1598036929, now seen corresponding path program 117 times [2022-04-06 20:30:56,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:56,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1999277796] [2022-04-06 20:30:56,673 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:56,673 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:56,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1598036929, now seen corresponding path program 118 times [2022-04-06 20:30:56,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:56,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765601449] [2022-04-06 20:30:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:56,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:58,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 119 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:58,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765601449] [2022-04-06 20:30:58,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765601449] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:58,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520617552] [2022-04-06 20:30:58,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:58,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:58,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:58,055 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 20:30:58,056 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 20:30:58,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:58,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:58,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:30:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 5251 trivial. 0 not checked. [2022-04-06 20:30:58,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 5251 trivial. 0 not checked. [2022-04-06 20:30:58,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520617552] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:58,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:58,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 6, 6] total 69 [2022-04-06 20:30:58,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:58,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1999277796] [2022-04-06 20:30:58,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1999277796] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:58,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:58,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:30:58,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562197995] [2022-04-06 20:30:58,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:58,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:30:58,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:58,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:30:58,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4494, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:30:58,883 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 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 20:31:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:03,286 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2022-04-06 20:31:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:31:03,286 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 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 20:31:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:03,287 INFO L225 Difference]: With dead ends: 205 [2022-04-06 20:31:03,287 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 20:31:03,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 378 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=556, Invalid=15956, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 20:31:03,288 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 189 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10512 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 10512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:03,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 19 Invalid, 10633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 10512 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:31:03,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 20:31:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-04-06 20:31:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0157068062827226) internal successors, (194), 191 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-04-06 20:31:03,321 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2022-04-06 20:31:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:03,321 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-04-06 20:31:03,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 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 20:31:03,321 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-04-06 20:31:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-04-06 20:31:03,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:03,322 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:03,341 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 20:31:03,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-06 20:31:03,529 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:03,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash -402557685, now seen corresponding path program 119 times [2022-04-06 20:31:03,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:03,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1062716162] [2022-04-06 20:31:03,531 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:03,531 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash -402557685, now seen corresponding path program 120 times [2022-04-06 20:31:03,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:03,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060640300] [2022-04-06 20:31:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:03,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:04,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 121 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:04,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:04,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060640300] [2022-04-06 20:31:04,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060640300] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:04,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635185214] [2022-04-06 20:31:04,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:31:04,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:04,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:04,949 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 20:31:04,949 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 20:31:04,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:31:04,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:04,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:31:04,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2022-04-06 20:31:05,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2022-04-06 20:31:05,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635185214] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:05,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:05,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 6, 6] total 70 [2022-04-06 20:31:05,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1062716162] [2022-04-06 20:31:05,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1062716162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:05,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:05,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:31:05,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21532406] [2022-04-06 20:31:05,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:05,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:31:05,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:31:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4629, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:31:05,751 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:10,369 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2022-04-06 20:31:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:31:10,369 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-04-06 20:31:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:10,370 INFO L225 Difference]: With dead ends: 208 [2022-04-06 20:31:10,370 INFO L226 Difference]: Without dead ends: 200 [2022-04-06 20:31:10,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 384 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=565, Invalid=16465, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 20:31:10,370 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 192 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 11158 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 11281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 11158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:10,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 259 Invalid, 11281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 11158 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 20:31:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-04-06 20:31:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-04-06 20:31:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 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 20:31:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2022-04-06 20:31:10,405 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2022-04-06 20:31:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:10,405 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2022-04-06 20:31:10,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2022-04-06 20:31:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 20:31:10,406 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:10,406 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:10,422 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 20:31:10,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:10,613 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:10,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1144463233, now seen corresponding path program 121 times [2022-04-06 20:31:10,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:10,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815344956] [2022-04-06 20:31:10,615 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:10,615 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1144463233, now seen corresponding path program 122 times [2022-04-06 20:31:10,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:10,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633420034] [2022-04-06 20:31:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:10,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:12,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 123 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633420034] [2022-04-06 20:31:12,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633420034] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767903917] [2022-04-06 20:31:12,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:31:12,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:12,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:12,076 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 20:31:12,076 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 20:31:12,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:31:12,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:12,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:31:12,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 5612 trivial. 0 not checked. [2022-04-06 20:31:12,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 5612 trivial. 0 not checked. [2022-04-06 20:31:12,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767903917] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:12,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:12,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 6, 6] total 71 [2022-04-06 20:31:12,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:12,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815344956] [2022-04-06 20:31:12,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815344956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:12,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:12,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:31:12,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613092541] [2022-04-06 20:31:12,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:12,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:31:12,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:12,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:31:12,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=4766, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:31:12,916 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 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 20:31:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:17,640 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2022-04-06 20:31:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:31:17,641 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 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 20:31:17,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:17,642 INFO L225 Difference]: With dead ends: 211 [2022-04-06 20:31:17,642 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 20:31:17,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 390 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=574, Invalid=16982, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:31:17,643 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 11570 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 11695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 11570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:17,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 299 Invalid, 11695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 11570 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 20:31:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 20:31:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-04-06 20:31:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2022-04-06 20:31:17,681 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2022-04-06 20:31:17,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:17,681 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2022-04-06 20:31:17,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 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 20:31:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2022-04-06 20:31:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-04-06 20:31:17,682 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:17,682 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:17,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:17,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:17,892 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:17,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:17,892 INFO L85 PathProgramCache]: Analyzing trace with hash -849422005, now seen corresponding path program 123 times [2022-04-06 20:31:17,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:17,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1773319303] [2022-04-06 20:31:17,894 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:17,894 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:17,894 INFO L85 PathProgramCache]: Analyzing trace with hash -849422005, now seen corresponding path program 124 times [2022-04-06 20:31:17,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:17,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508584560] [2022-04-06 20:31:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:17,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:19,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 125 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:19,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:19,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508584560] [2022-04-06 20:31:19,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508584560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:19,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744752777] [2022-04-06 20:31:19,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:31:19,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:19,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:19,416 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 20:31:19,416 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 20:31:19,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:31:19,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:19,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:31:19,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 5797 trivial. 0 not checked. [2022-04-06 20:31:19,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 5797 trivial. 0 not checked. [2022-04-06 20:31:20,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744752777] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:20,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:20,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 6, 6] total 72 [2022-04-06 20:31:20,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1773319303] [2022-04-06 20:31:20,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1773319303] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:20,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:20,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:31:20,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027326865] [2022-04-06 20:31:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:20,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:31:20,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:20,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:31:20,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4905, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:31:20,267 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:25,176 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-04-06 20:31:25,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:31:25,177 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-04-06 20:31:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:25,178 INFO L225 Difference]: With dead ends: 214 [2022-04-06 20:31:25,178 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 20:31:25,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 396 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=583, Invalid=17507, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:31:25,179 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 11820 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 11947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 11820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:25,179 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 199 Invalid, 11947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 11820 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:31:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 20:31:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-04-06 20:31:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.015) internal successors, (203), 200 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 20:31:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2022-04-06 20:31:25,218 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2022-04-06 20:31:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:25,219 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2022-04-06 20:31:25,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2022-04-06 20:31:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 20:31:25,219 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:25,219 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:25,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:25,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 20:31:25,420 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1286843583, now seen corresponding path program 125 times [2022-04-06 20:31:25,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:25,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1981650892] [2022-04-06 20:31:25,421 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:25,421 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1286843583, now seen corresponding path program 126 times [2022-04-06 20:31:25,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:25,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273330319] [2022-04-06 20:31:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:26,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 127 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:26,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:26,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273330319] [2022-04-06 20:31:26,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273330319] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:26,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987073981] [2022-04-06 20:31:26,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:31:26,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:26,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:26,976 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 20:31:26,977 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 20:31:27,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:31:27,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:27,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:31:27,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 5985 trivial. 0 not checked. [2022-04-06 20:31:27,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 5985 trivial. 0 not checked. [2022-04-06 20:31:27,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987073981] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:27,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:27,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 6, 6] total 73 [2022-04-06 20:31:27,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:27,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1981650892] [2022-04-06 20:31:27,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1981650892] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:27,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:27,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:31:27,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197592230] [2022-04-06 20:31:27,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:27,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:31:27,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:27,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:31:27,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=5046, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:31:27,812 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 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 20:31:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:32,749 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2022-04-06 20:31:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:31:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 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 20:31:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:32,750 INFO L225 Difference]: With dead ends: 217 [2022-04-06 20:31:32,750 INFO L226 Difference]: Without dead ends: 209 [2022-04-06 20:31:32,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 402 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=592, Invalid=18040, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:31:32,751 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 201 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11980 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 11980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:32,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 19 Invalid, 12109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 11980 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:31:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-04-06 20:31:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-04-06 20:31:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 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 20:31:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2022-04-06 20:31:32,794 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2022-04-06 20:31:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:32,794 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2022-04-06 20:31:32,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 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 20:31:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2022-04-06 20:31:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-04-06 20:31:32,795 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:32,795 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:32,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:32,995 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,SelfDestructingSolverStorable65 [2022-04-06 20:31:32,996 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:32,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1582297717, now seen corresponding path program 127 times [2022-04-06 20:31:32,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:32,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713387429] [2022-04-06 20:31:32,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:32,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:32,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1582297717, now seen corresponding path program 128 times [2022-04-06 20:31:32,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:32,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895296297] [2022-04-06 20:31:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:32,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:34,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 129 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:34,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895296297] [2022-04-06 20:31:34,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895296297] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:34,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183270001] [2022-04-06 20:31:34,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:31:34,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:34,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:34,597 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 20:31:34,598 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 20:31:34,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:31:34,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:34,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:31:34,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 6176 trivial. 0 not checked. [2022-04-06 20:31:35,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 6176 trivial. 0 not checked. [2022-04-06 20:31:35,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183270001] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:35,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:35,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 6, 6] total 74 [2022-04-06 20:31:35,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713387429] [2022-04-06 20:31:35,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713387429] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:35,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:35,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:31:35,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797718333] [2022-04-06 20:31:35,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:35,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:31:35,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:31:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=5189, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:31:35,470 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:40,708 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2022-04-06 20:31:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:31:40,708 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 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 206 [2022-04-06 20:31:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:40,709 INFO L225 Difference]: With dead ends: 220 [2022-04-06 20:31:40,709 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 20:31:40,710 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 408 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2088 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=601, Invalid=18581, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:31:40,710 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 12746 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 12877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 12746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:40,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 339 Invalid, 12877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 12746 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:31:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 20:31:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-04-06 20:31:40,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 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 20:31:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2022-04-06 20:31:40,758 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2022-04-06 20:31:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:40,758 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2022-04-06 20:31:40,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2022-04-06 20:31:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 20:31:40,759 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:40,759 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:40,777 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 20:31:40,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:40,971 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:40,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1226553089, now seen corresponding path program 129 times [2022-04-06 20:31:40,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:40,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [560031090] [2022-04-06 20:31:40,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:40,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1226553089, now seen corresponding path program 130 times [2022-04-06 20:31:40,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:40,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149732619] [2022-04-06 20:31:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:40,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:42,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 131 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:42,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:42,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149732619] [2022-04-06 20:31:42,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149732619] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:42,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128620136] [2022-04-06 20:31:42,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:31:42,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:42,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:42,633 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 20:31:42,633 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 20:31:42,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:31:42,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:31:42,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 6370 trivial. 0 not checked. [2022-04-06 20:31:43,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 6370 trivial. 0 not checked. [2022-04-06 20:31:43,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128620136] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:43,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:43,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 6, 6] total 75 [2022-04-06 20:31:43,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:43,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [560031090] [2022-04-06 20:31:43,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [560031090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:43,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:43,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:31:43,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346924862] [2022-04-06 20:31:43,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:43,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:31:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:31:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=5334, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:31:43,534 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 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 20:31:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:48,893 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2022-04-06 20:31:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:31:48,894 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 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 20:31:48,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:48,894 INFO L225 Difference]: With dead ends: 223 [2022-04-06 20:31:48,894 INFO L226 Difference]: Without dead ends: 215 [2022-04-06 20:31:48,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=610, Invalid=19130, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 20:31:48,895 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 207 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12978 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 13111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 12978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:48,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 209 Invalid, 13111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 12978 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:31:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-06 20:31:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-04-06 20:31:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.014354066985646) internal successors, (212), 209 states have internal predecessors, (212), 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 20:31:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2022-04-06 20:31:48,934 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2022-04-06 20:31:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:48,934 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2022-04-06 20:31:48,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 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 20:31:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2022-04-06 20:31:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-04-06 20:31:48,935 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:48,935 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:48,961 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 20:31:49,151 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,SelfDestructingSolverStorable67 [2022-04-06 20:31:49,151 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:49,151 INFO L85 PathProgramCache]: Analyzing trace with hash 853086667, now seen corresponding path program 131 times [2022-04-06 20:31:49,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:49,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1911674174] [2022-04-06 20:31:49,153 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:49,153 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:49,153 INFO L85 PathProgramCache]: Analyzing trace with hash 853086667, now seen corresponding path program 132 times [2022-04-06 20:31:49,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:49,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117886383] [2022-04-06 20:31:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:49,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:50,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 133 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:50,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:50,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117886383] [2022-04-06 20:31:50,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117886383] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:50,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022497743] [2022-04-06 20:31:50,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:31:50,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:50,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:50,855 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 20:31:50,857 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 20:31:50,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:31:50,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:31:50,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 6567 trivial. 0 not checked. [2022-04-06 20:31:51,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 6567 trivial. 0 not checked. [2022-04-06 20:31:51,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022497743] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:51,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:51,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 6, 6] total 76 [2022-04-06 20:31:51,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:51,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1911674174] [2022-04-06 20:31:51,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1911674174] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:51,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:51,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:31:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423398553] [2022-04-06 20:31:51,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:51,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:31:51,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:51,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:31:51,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5481, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:31:51,891 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:57,459 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2022-04-06 20:31:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:31:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 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 212 [2022-04-06 20:31:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:57,460 INFO L225 Difference]: With dead ends: 226 [2022-04-06 20:31:57,460 INFO L226 Difference]: Without dead ends: 218 [2022-04-06 20:31:57,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 420 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=619, Invalid=19687, Unknown=0, NotChecked=0, Total=20306 [2022-04-06 20:31:57,461 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 210 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 13480 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 13615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 13480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:57,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 299 Invalid, 13615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 13480 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 20:31:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-06 20:31:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-04-06 20:31:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 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 20:31:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2022-04-06 20:31:57,503 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 212 [2022-04-06 20:31:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:57,503 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2022-04-06 20:31:57,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2022-04-06 20:31:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 20:31:57,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:57,504 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:57,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:57,719 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,SelfDestructingSolverStorable68 [2022-04-06 20:31:57,719 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:57,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:57,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1119794495, now seen corresponding path program 133 times [2022-04-06 20:31:57,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:57,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1748907047] [2022-04-06 20:31:57,721 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:57,721 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1119794495, now seen corresponding path program 134 times [2022-04-06 20:31:57,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:57,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958179980] [2022-04-06 20:31:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:57,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:59,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 135 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:59,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:59,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958179980] [2022-04-06 20:31:59,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958179980] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:59,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405826634] [2022-04-06 20:31:59,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:31:59,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:59,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:59,483 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 20:31:59,484 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 20:31:59,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:31:59,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:59,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:31:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 6767 trivial. 0 not checked. [2022-04-06 20:31:59,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 6767 trivial. 0 not checked. [2022-04-06 20:32:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405826634] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:00,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:00,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 6, 6] total 77 [2022-04-06 20:32:00,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1748907047] [2022-04-06 20:32:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1748907047] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:00,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:00,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:32:00,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266141690] [2022-04-06 20:32:00,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:00,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:32:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:00,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:32:00,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=5630, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:32:00,407 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 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 20:32:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:06,089 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2022-04-06 20:32:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:32:06,089 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 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 20:32:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:06,090 INFO L225 Difference]: With dead ends: 229 [2022-04-06 20:32:06,090 INFO L226 Difference]: Without dead ends: 221 [2022-04-06 20:32:06,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 426 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=628, Invalid=20252, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 20:32:06,091 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 213 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 13826 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 13963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 13826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:06,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 254 Invalid, 13963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 13826 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:32:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-04-06 20:32:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-04-06 20:32:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.013953488372093) internal successors, (218), 215 states have internal predecessors, (218), 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 20:32:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2022-04-06 20:32:06,131 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 215 [2022-04-06 20:32:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:06,131 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2022-04-06 20:32:06,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 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 20:32:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2022-04-06 20:32:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-04-06 20:32:06,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:06,132 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:06,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:06,345 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,SelfDestructingSolverStorable69 [2022-04-06 20:32:06,345 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:06,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:06,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1404954123, now seen corresponding path program 135 times [2022-04-06 20:32:06,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:06,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [520246588] [2022-04-06 20:32:06,347 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:06,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:06,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1404954123, now seen corresponding path program 136 times [2022-04-06 20:32:06,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:06,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567289629] [2022-04-06 20:32:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:06,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:08,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 137 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:08,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:08,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567289629] [2022-04-06 20:32:08,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567289629] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:08,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826664610] [2022-04-06 20:32:08,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:08,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:08,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:08,184 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 20:32:08,185 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 20:32:08,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:08,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:32:08,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 6970 trivial. 0 not checked. [2022-04-06 20:32:08,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 6970 trivial. 0 not checked. [2022-04-06 20:32:09,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826664610] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:09,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:09,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 6, 6] total 78 [2022-04-06 20:32:09,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:09,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [520246588] [2022-04-06 20:32:09,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [520246588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:09,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:09,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:32:09,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563631391] [2022-04-06 20:32:09,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:09,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:32:09,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:32:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=5781, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:32:09,122 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:14,957 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2022-04-06 20:32:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:32:14,958 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 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 218 [2022-04-06 20:32:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:14,958 INFO L225 Difference]: With dead ends: 232 [2022-04-06 20:32:14,958 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 20:32:14,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 432 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2354 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=637, Invalid=20825, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 20:32:14,960 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 216 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 14310 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 14449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 14310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:14,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 319 Invalid, 14449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 14310 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 20:32:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 20:32:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-04-06 20:32:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 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 20:32:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2022-04-06 20:32:15,008 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 218 [2022-04-06 20:32:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:15,008 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2022-04-06 20:32:15,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:15,009 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2022-04-06 20:32:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 20:32:15,009 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:15,009 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:15,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-06 20:32:15,210 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,SelfDestructingSolverStorable70 [2022-04-06 20:32:15,210 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1571221887, now seen corresponding path program 137 times [2022-04-06 20:32:15,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:15,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [798511160] [2022-04-06 20:32:15,211 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:15,211 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:15,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1571221887, now seen corresponding path program 138 times [2022-04-06 20:32:15,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:15,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116071902] [2022-04-06 20:32:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:15,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:17,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 139 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:17,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:17,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116071902] [2022-04-06 20:32:17,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116071902] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:17,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219280131] [2022-04-06 20:32:17,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:17,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:17,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:17,023 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 20:32:17,023 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 20:32:17,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:17,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:32:17,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 7176 trivial. 0 not checked. [2022-04-06 20:32:17,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 7176 trivial. 0 not checked. [2022-04-06 20:32:17,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219280131] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:17,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:17,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 6, 6] total 79 [2022-04-06 20:32:17,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:17,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [798511160] [2022-04-06 20:32:17,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [798511160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:17,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:17,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:32:17,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054318996] [2022-04-06 20:32:17,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:17,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:32:17,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:17,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:32:17,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=5934, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:32:17,946 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 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 20:32:23,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:23,898 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2022-04-06 20:32:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:32:23,899 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 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 20:32:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:23,899 INFO L225 Difference]: With dead ends: 235 [2022-04-06 20:32:23,899 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 20:32:23,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 438 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=646, Invalid=21406, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 20:32:23,901 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 219 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 14452 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 14593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 14452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:23,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 94 Invalid, 14593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 14452 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 20:32:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 20:32:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-04-06 20:32:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0135746606334841) internal successors, (224), 221 states have internal predecessors, (224), 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 20:32:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2022-04-06 20:32:23,948 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 221 [2022-04-06 20:32:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:23,948 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2022-04-06 20:32:23,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 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 20:32:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2022-04-06 20:32:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-04-06 20:32:23,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:23,949 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:23,964 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 20:32:24,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:24,152 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 474122827, now seen corresponding path program 139 times [2022-04-06 20:32:24,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:24,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [672631356] [2022-04-06 20:32:24,153 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:24,153 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash 474122827, now seen corresponding path program 140 times [2022-04-06 20:32:24,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:24,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254289021] [2022-04-06 20:32:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:26,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 141 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:26,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:26,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254289021] [2022-04-06 20:32:26,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254289021] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:26,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020874754] [2022-04-06 20:32:26,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:26,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:26,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:26,060 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 20:32:26,061 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 20:32:26,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:26,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:26,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:32:26,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 7385 trivial. 0 not checked. [2022-04-06 20:32:26,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 7385 trivial. 0 not checked. [2022-04-06 20:32:27,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020874754] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:27,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:27,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 6, 6] total 80 [2022-04-06 20:32:27,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:27,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [672631356] [2022-04-06 20:32:27,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [672631356] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:27,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:27,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:32:27,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150631232] [2022-04-06 20:32:27,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:27,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:32:27,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:27,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:32:27,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=6089, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:32:27,026 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:33,225 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2022-04-06 20:32:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:32:33,225 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 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 224 [2022-04-06 20:32:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:33,226 INFO L225 Difference]: With dead ends: 238 [2022-04-06 20:32:33,226 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 20:32:33,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 444 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2493 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=655, Invalid=21995, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:32:33,227 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 15050 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 15193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 15050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:33,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 244 Invalid, 15193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 15050 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 20:32:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 20:32:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-04-06 20:32:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0133928571428572) internal successors, (227), 224 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 20:32:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2022-04-06 20:32:33,275 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 224 [2022-04-06 20:32:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:33,275 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2022-04-06 20:32:33,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:33,276 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2022-04-06 20:32:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 20:32:33,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:33,276 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:33,297 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 20:32:33,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:33,489 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash 637469249, now seen corresponding path program 141 times [2022-04-06 20:32:33,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:33,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1809017736] [2022-04-06 20:32:33,490 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:33,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash 637469249, now seen corresponding path program 142 times [2022-04-06 20:32:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:33,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022942130] [2022-04-06 20:32:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:35,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 143 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:35,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:35,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022942130] [2022-04-06 20:32:35,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022942130] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:35,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792786800] [2022-04-06 20:32:35,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:35,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:35,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:35,407 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:35,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:32:35,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:35,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:35,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:32:35,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-04-06 20:32:35,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-04-06 20:32:36,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792786800] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:36,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:36,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 6, 6] total 81 [2022-04-06 20:32:36,385 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:36,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1809017736] [2022-04-06 20:32:36,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1809017736] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:36,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:36,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:32:36,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123339915] [2022-04-06 20:32:36,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:36,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:32:36,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:32:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=6246, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:32:36,386 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 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 20:32:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:42,791 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2022-04-06 20:32:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:32:42,791 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 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 20:32:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:42,792 INFO L225 Difference]: With dead ends: 241 [2022-04-06 20:32:42,792 INFO L226 Difference]: Without dead ends: 233 [2022-04-06 20:32:42,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 450 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2564 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=664, Invalid=22592, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 20:32:42,793 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 225 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 15552 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 15697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 15552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:42,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 309 Invalid, 15697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 15552 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 20:32:42,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-04-06 20:32:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-04-06 20:32:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.013215859030837) internal successors, (230), 227 states have internal predecessors, (230), 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 20:32:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2022-04-06 20:32:42,842 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 227 [2022-04-06 20:32:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:42,842 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2022-04-06 20:32:42,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 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 20:32:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2022-04-06 20:32:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-04-06 20:32:42,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:42,843 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:42,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 20:32:43,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:43,044 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash 692780683, now seen corresponding path program 143 times [2022-04-06 20:32:43,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:43,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [730421071] [2022-04-06 20:32:43,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:43,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:43,045 INFO L85 PathProgramCache]: Analyzing trace with hash 692780683, now seen corresponding path program 144 times [2022-04-06 20:32:43,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:43,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780389306] [2022-04-06 20:32:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:43,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:45,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 145 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:45,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:45,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780389306] [2022-04-06 20:32:45,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780389306] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:45,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898632594] [2022-04-06 20:32:45,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:45,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:45,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:45,036 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 20:32:45,036 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 20:32:45,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:45,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:45,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:32:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-04-06 20:32:45,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-04-06 20:32:45,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898632594] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:45,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:45,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 6, 6] total 82 [2022-04-06 20:32:45,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:45,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [730421071] [2022-04-06 20:32:45,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [730421071] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:45,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:45,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:32:45,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838752508] [2022-04-06 20:32:45,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:45,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:32:45,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:32:45,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=6405, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:32:45,993 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:52,450 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2022-04-06 20:32:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:32:52,450 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 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 230 [2022-04-06 20:32:52,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:52,451 INFO L225 Difference]: With dead ends: 244 [2022-04-06 20:32:52,451 INFO L226 Difference]: Without dead ends: 236 [2022-04-06 20:32:52,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 456 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2636 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=673, Invalid=23197, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 20:32:52,452 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 228 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 15652 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 15652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:52,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 34 Invalid, 15799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 15652 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 20:32:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-04-06 20:32:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-04-06 20:32:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 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 20:32:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2022-04-06 20:32:52,498 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 230 [2022-04-06 20:32:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:52,498 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2022-04-06 20:32:52,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2022-04-06 20:32:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 20:32:52,499 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:52,499 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:52,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-06 20:32:52,699 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,SelfDestructingSolverStorable74 [2022-04-06 20:32:52,699 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:52,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash -791730687, now seen corresponding path program 145 times [2022-04-06 20:32:52,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:52,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [197616853] [2022-04-06 20:32:52,701 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:52,701 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash -791730687, now seen corresponding path program 146 times [2022-04-06 20:32:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:52,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492507344] [2022-04-06 20:32:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:52,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:54,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 147 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:54,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:54,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492507344] [2022-04-06 20:32:54,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492507344] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:54,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490930053] [2022-04-06 20:32:54,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:54,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:54,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:54,741 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 20:32:54,741 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 20:32:54,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:54,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:32:54,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 8030 trivial. 0 not checked. [2022-04-06 20:32:55,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 8030 trivial. 0 not checked. [2022-04-06 20:32:55,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490930053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:55,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:55,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 6, 6] total 83 [2022-04-06 20:32:55,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:55,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [197616853] [2022-04-06 20:32:55,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [197616853] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:55,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:55,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:32:55,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018764991] [2022-04-06 20:32:55,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:55,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:32:55,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:55,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:32:55,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=6566, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:32:55,731 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:02,558 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2022-04-06 20:33:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:33:02,558 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 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 233 [2022-04-06 20:33:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:02,559 INFO L225 Difference]: With dead ends: 247 [2022-04-06 20:33:02,559 INFO L226 Difference]: Without dead ends: 239 [2022-04-06 20:33:02,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 462 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2709 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=682, Invalid=23810, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:33:02,560 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 231 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 16508 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 16657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 16508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:02,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 384 Invalid, 16657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 16508 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 20:33:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-04-06 20:33:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-04-06 20:33:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0128755364806867) internal successors, (236), 233 states have internal predecessors, (236), 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 20:33:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2022-04-06 20:33:02,627 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 233 [2022-04-06 20:33:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:02,627 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2022-04-06 20:33:02,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2022-04-06 20:33:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-04-06 20:33:02,628 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:02,628 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:02,646 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 20:33:02,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:02,844 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash -591707445, now seen corresponding path program 147 times [2022-04-06 20:33:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:02,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1036269516] [2022-04-06 20:33:02,846 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:02,846 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:02,846 INFO L85 PathProgramCache]: Analyzing trace with hash -591707445, now seen corresponding path program 148 times [2022-04-06 20:33:02,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:02,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437895733] [2022-04-06 20:33:02,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:02,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:04,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 149 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:04,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:04,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437895733] [2022-04-06 20:33:04,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437895733] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:04,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884515835] [2022-04-06 20:33:04,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:04,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:04,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:04,918 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 20:33:04,919 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 20:33:04,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:04,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:33:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 8251 trivial. 0 not checked. [2022-04-06 20:33:05,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 8251 trivial. 0 not checked. [2022-04-06 20:33:05,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884515835] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:05,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:05,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 6, 6] total 84 [2022-04-06 20:33:05,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:05,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1036269516] [2022-04-06 20:33:05,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1036269516] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:05,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:05,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:33:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726341771] [2022-04-06 20:33:05,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:05,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:33:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:33:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=6729, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:33:05,966 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:12,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:12,972 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2022-04-06 20:33:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:33:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 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 236 [2022-04-06 20:33:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:12,974 INFO L225 Difference]: With dead ends: 250 [2022-04-06 20:33:12,974 INFO L226 Difference]: Without dead ends: 242 [2022-04-06 20:33:12,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 468 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=691, Invalid=24431, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 20:33:12,975 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 234 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 16944 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 17095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 16944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:12,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 379 Invalid, 17095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 16944 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 20:33:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-04-06 20:33:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-04-06 20:33:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 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 20:33:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2022-04-06 20:33:13,022 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 236 [2022-04-06 20:33:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:13,023 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2022-04-06 20:33:13,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2022-04-06 20:33:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 20:33:13,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:13,024 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:13,042 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 20:33:13,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:13,226 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1181055425, now seen corresponding path program 149 times [2022-04-06 20:33:13,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:13,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [873042437] [2022-04-06 20:33:13,227 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:13,227 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1181055425, now seen corresponding path program 150 times [2022-04-06 20:33:13,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:13,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677720397] [2022-04-06 20:33:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:13,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:15,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 151 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:15,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677720397] [2022-04-06 20:33:15,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677720397] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:15,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953471194] [2022-04-06 20:33:15,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:15,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:15,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:15,347 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 20:33:15,349 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 20:33:15,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:33:15,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:15,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:33:15,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 8475 trivial. 0 not checked. [2022-04-06 20:33:15,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 8475 trivial. 0 not checked. [2022-04-06 20:33:16,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953471194] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:16,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:16,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 6, 6] total 85 [2022-04-06 20:33:16,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:16,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [873042437] [2022-04-06 20:33:16,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [873042437] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:16,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:16,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:33:16,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122070998] [2022-04-06 20:33:16,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:16,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:33:16,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:16,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:33:16,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=6894, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:33:16,356 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:23,386 INFO L93 Difference]: Finished difference Result 253 states and 257 transitions. [2022-04-06 20:33:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:33:23,387 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 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 239 [2022-04-06 20:33:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:23,387 INFO L225 Difference]: With dead ends: 253 [2022-04-06 20:33:23,387 INFO L226 Difference]: Without dead ends: 245 [2022-04-06 20:33:23,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 474 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=700, Invalid=25060, Unknown=0, NotChecked=0, Total=25760 [2022-04-06 20:33:23,389 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 237 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 17026 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 17179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 17026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:23,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 74 Invalid, 17179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 17026 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 20:33:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-04-06 20:33:23,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-04-06 20:33:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 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 20:33:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2022-04-06 20:33:23,437 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 239 [2022-04-06 20:33:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:23,437 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2022-04-06 20:33:23,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2022-04-06 20:33:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-04-06 20:33:23,438 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:23,438 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:23,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 20:33:23,638 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,SelfDestructingSolverStorable77 [2022-04-06 20:33:23,639 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1653123317, now seen corresponding path program 151 times [2022-04-06 20:33:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:23,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1855016085] [2022-04-06 20:33:23,640 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:23,640 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1653123317, now seen corresponding path program 152 times [2022-04-06 20:33:23,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:23,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927720970] [2022-04-06 20:33:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:23,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:25,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 153 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:25,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:25,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927720970] [2022-04-06 20:33:25,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927720970] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091236567] [2022-04-06 20:33:25,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:25,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:25,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:25,826 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 20:33:25,827 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 20:33:25,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:25,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:25,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:33:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 8702 trivial. 0 not checked. [2022-04-06 20:33:26,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 8702 trivial. 0 not checked. [2022-04-06 20:33:26,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091236567] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:26,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:26,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 6, 6] total 86 [2022-04-06 20:33:26,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:26,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1855016085] [2022-04-06 20:33:26,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1855016085] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:26,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:26,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 20:33:26,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510904336] [2022-04-06 20:33:26,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:26,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 20:33:26,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 20:33:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=7061, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:33:26,864 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:34,037 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2022-04-06 20:33:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:33:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 2 states have call successors, (3), 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 242 [2022-04-06 20:33:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:34,038 INFO L225 Difference]: With dead ends: 256 [2022-04-06 20:33:34,038 INFO L226 Difference]: Without dead ends: 248 [2022-04-06 20:33:34,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 480 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2934 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=709, Invalid=25697, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 20:33:34,039 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 240 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 17516 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 17671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 17516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:34,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 104 Invalid, 17671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 17516 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 20:33:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-04-06 20:33:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-04-06 20:33:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 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 20:33:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2022-04-06 20:33:34,089 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 242 [2022-04-06 20:33:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:34,089 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2022-04-06 20:33:34,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2022-04-06 20:33:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-04-06 20:33:34,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:34,090 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:34,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 20:33:34,290 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,SelfDestructingSolverStorable78 [2022-04-06 20:33:34,291 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 90045825, now seen corresponding path program 153 times [2022-04-06 20:33:34,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:34,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398734807] [2022-04-06 20:33:34,292 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:34,292 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash 90045825, now seen corresponding path program 154 times [2022-04-06 20:33:34,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:34,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638437468] [2022-04-06 20:33:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:36,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 155 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:36,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:36,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638437468] [2022-04-06 20:33:36,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638437468] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:36,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421028420] [2022-04-06 20:33:36,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:36,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:36,608 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 20:33:36,609 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 20:33:36,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:36,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:36,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:33:36,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 8932 trivial. 0 not checked. [2022-04-06 20:33:37,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 8932 trivial. 0 not checked. [2022-04-06 20:33:37,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421028420] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:37,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:37,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 6, 6] total 87 [2022-04-06 20:33:37,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:37,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398734807] [2022-04-06 20:33:37,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398734807] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:37,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:37,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 20:33:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376893642] [2022-04-06 20:33:37,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:37,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 20:33:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 20:33:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=7230, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:33:37,672 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:45,128 INFO L93 Difference]: Finished difference Result 259 states and 263 transitions. [2022-04-06 20:33:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:33:45,128 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 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 245 [2022-04-06 20:33:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:45,129 INFO L225 Difference]: With dead ends: 259 [2022-04-06 20:33:45,129 INFO L226 Difference]: Without dead ends: 251 [2022-04-06 20:33:45,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 486 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3011 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=718, Invalid=26342, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 20:33:45,130 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 243 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 18174 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 18331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 18174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:45,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 269 Invalid, 18331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 18174 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-04-06 20:33:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-06 20:33:45,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-04-06 20:33:45,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0122448979591836) internal successors, (248), 245 states have internal predecessors, (248), 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 20:33:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2022-04-06 20:33:45,182 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 245 [2022-04-06 20:33:45,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:45,182 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2022-04-06 20:33:45,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2022-04-06 20:33:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-04-06 20:33:45,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:45,183 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:45,199 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 20:33:45,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:45,399 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:45,399 INFO L85 PathProgramCache]: Analyzing trace with hash 392379211, now seen corresponding path program 155 times [2022-04-06 20:33:45,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:45,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1449232647] [2022-04-06 20:33:45,400 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:45,400 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:45,401 INFO L85 PathProgramCache]: Analyzing trace with hash 392379211, now seen corresponding path program 156 times [2022-04-06 20:33:45,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:45,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907267880] [2022-04-06 20:33:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:45,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:47,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 157 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:47,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:47,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907267880] [2022-04-06 20:33:47,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907267880] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:47,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796376951] [2022-04-06 20:33:47,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:47,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:47,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:47,685 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 20:33:47,686 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 20:33:47,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:33:47,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:33:47,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 9165 trivial. 0 not checked. [2022-04-06 20:33:48,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 9165 trivial. 0 not checked. [2022-04-06 20:33:48,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796376951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:48,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:48,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 6, 6] total 88 [2022-04-06 20:33:48,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:48,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1449232647] [2022-04-06 20:33:48,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1449232647] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:48,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:48,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 20:33:48,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444153042] [2022-04-06 20:33:48,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:48,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 20:33:48,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 20:33:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=7401, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:33:48,727 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:56,256 INFO L93 Difference]: Finished difference Result 262 states and 266 transitions. [2022-04-06 20:33:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:33:56,256 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 states have internal predecessors, (244), 2 states have call successors, (3), 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 248 [2022-04-06 20:33:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:56,257 INFO L225 Difference]: With dead ends: 262 [2022-04-06 20:33:56,257 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 20:33:56,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 492 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=727, Invalid=26995, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 20:33:56,258 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 246 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 18382 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 18541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 18382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:56,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 54 Invalid, 18541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 18382 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-04-06 20:33:56,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 20:33:56,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2022-04-06 20:33:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0120967741935485) internal successors, (251), 248 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 20:33:56,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2022-04-06 20:33:56,310 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 248 [2022-04-06 20:33:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:56,315 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2022-04-06 20:33:56,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2022-04-06 20:33:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-04-06 20:33:56,316 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:56,316 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:56,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-06 20:33:56,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:56,517 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:56,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:56,517 INFO L85 PathProgramCache]: Analyzing trace with hash 659861825, now seen corresponding path program 157 times [2022-04-06 20:33:56,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:56,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [315454694] [2022-04-06 20:33:56,518 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:56,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:56,519 INFO L85 PathProgramCache]: Analyzing trace with hash 659861825, now seen corresponding path program 158 times [2022-04-06 20:33:56,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:56,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611524191] [2022-04-06 20:33:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:56,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:58,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 159 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:58,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611524191] [2022-04-06 20:33:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611524191] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081349732] [2022-04-06 20:33:58,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:58,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:58,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:58,862 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 20:33:58,863 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 20:33:58,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:58,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:33:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 9401 trivial. 0 not checked. [2022-04-06 20:33:59,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 9401 trivial. 0 not checked. [2022-04-06 20:33:59,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081349732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:59,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:59,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 6, 6] total 89 [2022-04-06 20:33:59,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:59,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [315454694] [2022-04-06 20:33:59,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [315454694] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:59,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:59,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 20:33:59,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685266225] [2022-04-06 20:33:59,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:59,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 20:33:59,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:59,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 20:33:59,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=7574, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:33:59,946 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:07,720 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2022-04-06 20:34:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 20:34:07,720 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 2 states have call successors, (3), 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 251 [2022-04-06 20:34:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:07,721 INFO L225 Difference]: With dead ends: 265 [2022-04-06 20:34:07,721 INFO L226 Difference]: Without dead ends: 257 [2022-04-06 20:34:07,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 498 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3168 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=736, Invalid=27656, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:34:07,722 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 249 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 19034 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 19195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 19034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:07,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 204 Invalid, 19195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 19034 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-04-06 20:34:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-06 20:34:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2022-04-06 20:34:07,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0119521912350598) internal successors, (254), 251 states have internal predecessors, (254), 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 20:34:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2022-04-06 20:34:07,775 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 251 [2022-04-06 20:34:07,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:07,776 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2022-04-06 20:34:07,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2022-04-06 20:34:07,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-04-06 20:34:07,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:07,777 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:07,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-06 20:34:07,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-04-06 20:34:07,977 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:07,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:07,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2070081419, now seen corresponding path program 159 times [2022-04-06 20:34:07,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:07,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1928730571] [2022-04-06 20:34:07,979 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:07,979 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2070081419, now seen corresponding path program 160 times [2022-04-06 20:34:07,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:07,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295721928] [2022-04-06 20:34:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:07,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:10,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 161 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:10,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:10,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295721928] [2022-04-06 20:34:10,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295721928] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:10,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823477322] [2022-04-06 20:34:10,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:10,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:10,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:10,426 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 20:34:10,427 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 20:34:10,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:10,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:10,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:34:10,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 9640 trivial. 0 not checked. [2022-04-06 20:34:11,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 9640 trivial. 0 not checked. [2022-04-06 20:34:11,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823477322] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:11,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:11,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 6, 6] total 90 [2022-04-06 20:34:11,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1928730571] [2022-04-06 20:34:11,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1928730571] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:11,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:11,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 20:34:11,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221703706] [2022-04-06 20:34:11,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:11,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 20:34:11,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:11,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 20:34:11,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=7749, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:34:11,542 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand has 84 states, 84 states have (on average 2.9761904761904763) internal successors, (250), 83 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:19,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:19,591 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2022-04-06 20:34:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 20:34:19,591 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.9761904761904763) internal successors, (250), 83 states have internal predecessors, (250), 2 states have call successors, (3), 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 254 [2022-04-06 20:34:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:19,592 INFO L225 Difference]: With dead ends: 268 [2022-04-06 20:34:19,592 INFO L226 Difference]: Without dead ends: 260 [2022-04-06 20:34:19,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 504 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=745, Invalid=28325, Unknown=0, NotChecked=0, Total=29070 [2022-04-06 20:34:19,593 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 19746 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 19909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 19746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:19,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 399 Invalid, 19909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 19746 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-04-06 20:34:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-04-06 20:34:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2022-04-06 20:34:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 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 20:34:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2022-04-06 20:34:19,653 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 254 [2022-04-06 20:34:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:19,653 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2022-04-06 20:34:19,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.9761904761904763) internal successors, (250), 83 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2022-04-06 20:34:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-04-06 20:34:19,654 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:19,654 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:19,672 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 20:34:19,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:19,854 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash 551916801, now seen corresponding path program 161 times [2022-04-06 20:34:19,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:19,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2050163162] [2022-04-06 20:34:19,856 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:19,856 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:19,856 INFO L85 PathProgramCache]: Analyzing trace with hash 551916801, now seen corresponding path program 162 times [2022-04-06 20:34:19,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:19,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257443298] [2022-04-06 20:34:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:19,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:22,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10045 backedges. 163 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:22,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257443298] [2022-04-06 20:34:22,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257443298] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543746099] [2022-04-06 20:34:22,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:22,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:22,309 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 20:34:22,309 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 20:34:22,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:34:22,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:22,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:34:22,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10045 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 9882 trivial. 0 not checked. [2022-04-06 20:34:22,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10045 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 9882 trivial. 0 not checked. [2022-04-06 20:34:23,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543746099] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:23,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:23,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 6, 6] total 91 [2022-04-06 20:34:23,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:23,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2050163162] [2022-04-06 20:34:23,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2050163162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:23,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:23,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 20:34:23,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577468540] [2022-04-06 20:34:23,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:23,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 20:34:23,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 20:34:23,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=7926, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:34:23,368 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand has 85 states, 85 states have (on average 2.976470588235294) internal successors, (253), 84 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:31,569 INFO L93 Difference]: Finished difference Result 271 states and 275 transitions. [2022-04-06 20:34:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 20:34:31,569 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.976470588235294) internal successors, (253), 84 states have internal predecessors, (253), 2 states have call successors, (3), 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 257 [2022-04-06 20:34:31,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:31,570 INFO L225 Difference]: With dead ends: 271 [2022-04-06 20:34:31,570 INFO L226 Difference]: Without dead ends: 263 [2022-04-06 20:34:31,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 510 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3329 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=754, Invalid=29002, Unknown=0, NotChecked=0, Total=29756 [2022-04-06 20:34:31,571 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 255 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 20056 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 20221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 20056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:31,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 254 Invalid, 20221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 20056 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-04-06 20:34:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-06 20:34:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2022-04-06 20:34:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.0116731517509727) internal successors, (260), 257 states have internal predecessors, (260), 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 20:34:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 264 transitions. [2022-04-06 20:34:31,627 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 264 transitions. Word has length 257 [2022-04-06 20:34:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:31,627 INFO L478 AbstractCegarLoop]: Abstraction has 262 states and 264 transitions. [2022-04-06 20:34:31,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.976470588235294) internal successors, (253), 84 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 264 transitions. [2022-04-06 20:34:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-04-06 20:34:31,628 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:31,628 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:31,644 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 20:34:31,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:31,829 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:31,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1084591157, now seen corresponding path program 163 times [2022-04-06 20:34:31,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:31,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094931399] [2022-04-06 20:34:31,830 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:31,830 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:31,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1084591157, now seen corresponding path program 164 times [2022-04-06 20:34:31,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:31,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104399857] [2022-04-06 20:34:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:31,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:34,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 165 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:34,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104399857] [2022-04-06 20:34:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104399857] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114977108] [2022-04-06 20:34:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:34,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:34,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:34,313 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 20:34:34,314 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 20:34:34,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:34,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:34:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 10127 trivial. 0 not checked. [2022-04-06 20:34:34,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10292 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 10127 trivial. 0 not checked. [2022-04-06 20:34:35,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114977108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:35,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:35,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 6, 6] total 92 [2022-04-06 20:34:35,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:35,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094931399] [2022-04-06 20:34:35,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094931399] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:35,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:35,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 20:34:35,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950329449] [2022-04-06 20:34:35,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:35,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 20:34:35,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:35,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 20:34:35,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=8105, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:34:35,453 INFO L87 Difference]: Start difference. First operand 262 states and 264 transitions. Second operand has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:43,793 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2022-04-06 20:34:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 20:34:43,794 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 2 states have call successors, (3), 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 260 [2022-04-06 20:34:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:43,794 INFO L225 Difference]: With dead ends: 274 [2022-04-06 20:34:43,794 INFO L226 Difference]: Without dead ends: 266 [2022-04-06 20:34:43,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 516 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3411 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=763, Invalid=29687, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:34:43,796 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 258 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20270 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 20270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:43,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 24 Invalid, 20437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 20270 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-04-06 20:34:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-04-06 20:34:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2022-04-06 20:34:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 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 20:34:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2022-04-06 20:34:43,852 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 260 [2022-04-06 20:34:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:43,852 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2022-04-06 20:34:43,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2022-04-06 20:34:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-04-06 20:34:43,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:43,854 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:43,871 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 20:34:44,054 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,SelfDestructingSolverStorable84 [2022-04-06 20:34:44,054 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:44,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:44,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2119391039, now seen corresponding path program 165 times [2022-04-06 20:34:44,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:44,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647756422] [2022-04-06 20:34:44,055 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:44,056 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:44,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2119391039, now seen corresponding path program 166 times [2022-04-06 20:34:44,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:44,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239954175] [2022-04-06 20:34:44,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:44,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:46,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 167 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:46,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:46,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239954175] [2022-04-06 20:34:46,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239954175] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:46,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635200032] [2022-04-06 20:34:46,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:46,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:46,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:46,665 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 20:34:46,665 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 20:34:46,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:46,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:46,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:34:46,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 10375 trivial. 0 not checked. [2022-04-06 20:34:47,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10542 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 10375 trivial. 0 not checked. [2022-04-06 20:34:47,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635200032] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:47,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:47,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 6, 6] total 93 [2022-04-06 20:34:47,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:47,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647756422] [2022-04-06 20:34:47,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647756422] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:47,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:47,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 20:34:47,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627422668] [2022-04-06 20:34:47,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:47,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 20:34:47,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:47,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 20:34:47,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=8286, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:34:47,802 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 86 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:56,262 INFO L93 Difference]: Finished difference Result 277 states and 281 transitions. [2022-04-06 20:34:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:34:56,262 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 86 states have internal predecessors, (259), 2 states have call successors, (3), 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 263 [2022-04-06 20:34:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:56,263 INFO L225 Difference]: With dead ends: 277 [2022-04-06 20:34:56,263 INFO L226 Difference]: Without dead ends: 269 [2022-04-06 20:34:56,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 522 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3494 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=772, Invalid=30380, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 20:34:56,264 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 261 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 21018 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 21187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 21018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:56,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 234 Invalid, 21187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 21018 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-04-06 20:34:56,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-04-06 20:34:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2022-04-06 20:34:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 states have internal predecessors, (266), 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 20:34:56,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 270 transitions. [2022-04-06 20:34:56,327 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 270 transitions. Word has length 263 [2022-04-06 20:34:56,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:56,328 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 270 transitions. [2022-04-06 20:34:56,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.9770114942528734) internal successors, (259), 86 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:56,328 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 270 transitions. [2022-04-06 20:34:56,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-04-06 20:34:56,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:56,329 INFO L499 BasicCegarLoop]: trace histogram [85, 85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:56,344 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 20:34:56,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:56,529 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:56,530 INFO L85 PathProgramCache]: Analyzing trace with hash -567425013, now seen corresponding path program 167 times [2022-04-06 20:34:56,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:56,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [779413305] [2022-04-06 20:34:56,531 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:56,531 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash -567425013, now seen corresponding path program 168 times [2022-04-06 20:34:56,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:56,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900400064] [2022-04-06 20:34:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:56,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:59,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10795 backedges. 169 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:59,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:59,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900400064] [2022-04-06 20:34:59,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900400064] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:59,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805944805] [2022-04-06 20:34:59,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:59,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:59,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:59,131 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 20:34:59,132 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 20:34:59,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:34:59,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:59,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:34:59,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10795 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2022-04-06 20:34:59,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10795 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2022-04-06 20:35:00,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805944805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:00,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:00,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 6, 6] total 94 [2022-04-06 20:35:00,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:00,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [779413305] [2022-04-06 20:35:00,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [779413305] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:00,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:00,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 20:35:00,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633875768] [2022-04-06 20:35:00,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:00,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 20:35:00,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:00,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 20:35:00,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=8469, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:35:00,231 INFO L87 Difference]: Start difference. First operand 268 states and 270 transitions. Second operand has 88 states, 88 states have (on average 2.977272727272727) internal successors, (262), 87 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:08,854 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2022-04-06 20:35:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 20:35:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.977272727272727) internal successors, (262), 87 states have internal predecessors, (262), 2 states have call successors, (3), 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 266 [2022-04-06 20:35:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:08,856 INFO L225 Difference]: With dead ends: 280 [2022-04-06 20:35:08,856 INFO L226 Difference]: Without dead ends: 272 [2022-04-06 20:35:08,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 528 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3578 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=781, Invalid=31081, Unknown=0, NotChecked=0, Total=31862 [2022-04-06 20:35:08,857 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 264 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 21424 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 21595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 21424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:08,857 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 154 Invalid, 21595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 21424 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-04-06 20:35:08,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-04-06 20:35:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-04-06 20:35:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 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 20:35:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2022-04-06 20:35:08,923 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 266 [2022-04-06 20:35:08,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:08,924 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2022-04-06 20:35:08,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.977272727272727) internal successors, (262), 87 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:08,924 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2022-04-06 20:35:08,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-04-06 20:35:08,925 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:08,925 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:08,942 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 20:35:09,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:09,125 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1270485887, now seen corresponding path program 169 times [2022-04-06 20:35:09,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:09,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1271015482] [2022-04-06 20:35:09,127 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:09,127 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1270485887, now seen corresponding path program 170 times [2022-04-06 20:35:09,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:09,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645560152] [2022-04-06 20:35:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:09,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:11,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11051 backedges. 171 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:11,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:11,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645560152] [2022-04-06 20:35:11,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645560152] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:11,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250254331] [2022-04-06 20:35:11,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:11,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:11,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:11,781 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 20:35:11,781 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 20:35:11,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:11,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:35:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11051 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 10880 trivial. 0 not checked. [2022-04-06 20:35:12,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11051 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 10880 trivial. 0 not checked. [2022-04-06 20:35:12,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250254331] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:12,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:12,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 6, 6] total 95 [2022-04-06 20:35:12,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:12,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1271015482] [2022-04-06 20:35:12,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1271015482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:12,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:12,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 20:35:12,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538724992] [2022-04-06 20:35:12,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:12,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 20:35:12,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 20:35:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=8654, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:35:12,933 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:21,655 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2022-04-06 20:35:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 20:35:21,655 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 2 states have call successors, (3), 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 269 [2022-04-06 20:35:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:21,656 INFO L225 Difference]: With dead ends: 283 [2022-04-06 20:35:21,656 INFO L226 Difference]: Without dead ends: 275 [2022-04-06 20:35:21,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 534 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3663 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=790, Invalid=31790, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 20:35:21,657 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 267 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21800 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 21800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:21,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 44 Invalid, 21973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 21800 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-04-06 20:35:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-06 20:35:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2022-04-06 20:35:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.0111524163568772) internal successors, (272), 269 states have internal predecessors, (272), 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 20:35:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 276 transitions. [2022-04-06 20:35:21,718 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 276 transitions. Word has length 269 [2022-04-06 20:35:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:21,718 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 276 transitions. [2022-04-06 20:35:21,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 276 transitions. [2022-04-06 20:35:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-04-06 20:35:21,719 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:21,719 INFO L499 BasicCegarLoop]: trace histogram [87, 87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:21,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 20:35:21,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-04-06 20:35:21,920 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash 398519371, now seen corresponding path program 171 times [2022-04-06 20:35:21,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [482559176] [2022-04-06 20:35:21,921 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:21,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:21,921 INFO L85 PathProgramCache]: Analyzing trace with hash 398519371, now seen corresponding path program 172 times [2022-04-06 20:35:21,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:21,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598844788] [2022-04-06 20:35:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:21,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:24,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11310 backedges. 173 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:24,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:24,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598844788] [2022-04-06 20:35:24,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598844788] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:24,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326997292] [2022-04-06 20:35:24,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:24,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:24,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:24,595 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 20:35:24,596 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 20:35:24,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:24,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:24,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:35:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11310 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 11137 trivial. 0 not checked. [2022-04-06 20:35:25,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11310 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 11137 trivial. 0 not checked. [2022-04-06 20:35:25,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326997292] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:25,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:25,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 6, 6] total 96 [2022-04-06 20:35:25,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:25,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [482559176] [2022-04-06 20:35:25,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [482559176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:25,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:25,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 20:35:25,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842818676] [2022-04-06 20:35:25,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:25,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 20:35:25,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 20:35:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=8841, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:35:25,742 INFO L87 Difference]: Start difference. First operand 274 states and 276 transitions. Second operand has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 89 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:34,753 INFO L93 Difference]: Finished difference Result 286 states and 290 transitions. [2022-04-06 20:35:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 20:35:34,753 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 89 states have internal predecessors, (268), 2 states have call successors, (3), 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 272 [2022-04-06 20:35:34,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:34,754 INFO L225 Difference]: With dead ends: 286 [2022-04-06 20:35:34,754 INFO L226 Difference]: Without dead ends: 278 [2022-04-06 20:35:34,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 540 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=799, Invalid=32507, Unknown=0, NotChecked=0, Total=33306 [2022-04-06 20:35:34,755 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 270 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 22596 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 22771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 22596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:34,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 279 Invalid, 22771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 22596 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-04-06 20:35:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-04-06 20:35:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-04-06 20:35:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 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 20:35:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 279 transitions. [2022-04-06 20:35:34,817 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 279 transitions. Word has length 272 [2022-04-06 20:35:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:34,817 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 279 transitions. [2022-04-06 20:35:34,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 89 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 279 transitions. [2022-04-06 20:35:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-04-06 20:35:34,818 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:34,818 INFO L499 BasicCegarLoop]: trace histogram [88, 88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:34,837 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 20:35:35,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:35,019 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:35,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:35,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1102225343, now seen corresponding path program 173 times [2022-04-06 20:35:35,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:35,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [279424006] [2022-04-06 20:35:35,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:35,020 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1102225343, now seen corresponding path program 174 times [2022-04-06 20:35:35,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:35,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118198167] [2022-04-06 20:35:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:35,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:37,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11572 backedges. 175 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:37,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:37,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118198167] [2022-04-06 20:35:37,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118198167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:37,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160147358] [2022-04-06 20:35:37,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:37,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:37,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:37,776 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 20:35:37,776 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 20:35:37,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:35:37,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:37,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:35:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11572 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 11397 trivial. 0 not checked. [2022-04-06 20:35:38,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11572 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 11397 trivial. 0 not checked. [2022-04-06 20:35:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160147358] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:38,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:38,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 6, 6] total 97 [2022-04-06 20:35:38,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [279424006] [2022-04-06 20:35:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [279424006] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:38,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:38,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 20:35:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016586318] [2022-04-06 20:35:38,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:38,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 20:35:38,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 20:35:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=9030, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:35:38,913 INFO L87 Difference]: Start difference. First operand 277 states and 279 transitions. Second operand has 91 states, 91 states have (on average 2.978021978021978) internal successors, (271), 90 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:48,151 INFO L93 Difference]: Finished difference Result 289 states and 293 transitions. [2022-04-06 20:35:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 20:35:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.978021978021978) internal successors, (271), 90 states have internal predecessors, (271), 2 states have call successors, (3), 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 275 [2022-04-06 20:35:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:48,152 INFO L225 Difference]: With dead ends: 289 [2022-04-06 20:35:48,152 INFO L226 Difference]: Without dead ends: 281 [2022-04-06 20:35:48,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 546 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3836 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=808, Invalid=33232, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 20:35:48,153 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 273 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 23284 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 23461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 23284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:48,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 419 Invalid, 23461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 23284 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-04-06 20:35:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-04-06 20:35:48,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2022-04-06 20:35:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.010909090909091) internal successors, (278), 275 states have internal predecessors, (278), 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 20:35:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2022-04-06 20:35:48,216 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 275 [2022-04-06 20:35:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:48,216 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2022-04-06 20:35:48,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.978021978021978) internal successors, (271), 90 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2022-04-06 20:35:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-04-06 20:35:48,217 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:48,218 INFO L499 BasicCegarLoop]: trace histogram [89, 89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:48,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 20:35:48,418 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:48,418 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:48,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash 821551243, now seen corresponding path program 175 times [2022-04-06 20:35:48,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:48,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [542246826] [2022-04-06 20:35:48,420 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:48,420 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash 821551243, now seen corresponding path program 176 times [2022-04-06 20:35:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:48,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799922317] [2022-04-06 20:35:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:48,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:51,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11837 backedges. 177 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:51,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799922317] [2022-04-06 20:35:51,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799922317] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734220279] [2022-04-06 20:35:51,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:51,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:51,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:51,224 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 20:35:51,225 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 20:35:51,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:51,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:51,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:35:51,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11837 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 11660 trivial. 0 not checked. [2022-04-06 20:35:51,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11837 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 11660 trivial. 0 not checked. [2022-04-06 20:35:52,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734220279] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:52,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:52,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 6, 6] total 98 [2022-04-06 20:35:52,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:52,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [542246826] [2022-04-06 20:35:52,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [542246826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:52,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:52,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 20:35:52,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880282558] [2022-04-06 20:35:52,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:52,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 20:35:52,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:52,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 20:35:52,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=9221, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:35:52,416 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:01,837 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2022-04-06 20:36:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 20:36:01,838 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 2 states have call successors, (3), 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 278 [2022-04-06 20:36:01,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:01,838 INFO L225 Difference]: With dead ends: 292 [2022-04-06 20:36:01,839 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 20:36:01,840 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 552 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3924 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=817, Invalid=33965, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 20:36:01,840 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 276 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 23684 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 23863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 23684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:01,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 314 Invalid, 23863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 23684 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-04-06 20:36:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 20:36:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2022-04-06 20:36:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 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 20:36:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2022-04-06 20:36:01,904 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 278 [2022-04-06 20:36:01,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:01,904 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2022-04-06 20:36:01,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2022-04-06 20:36:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-04-06 20:36:01,905 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:01,905 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:01,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 20:36:02,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:02,106 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:02,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:02,107 INFO L85 PathProgramCache]: Analyzing trace with hash 6226945, now seen corresponding path program 177 times [2022-04-06 20:36:02,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:02,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [227498892] [2022-04-06 20:36:02,108 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:02,108 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash 6226945, now seen corresponding path program 178 times [2022-04-06 20:36:02,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:02,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158291140] [2022-04-06 20:36:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:02,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:04,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12105 backedges. 179 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:04,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:04,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158291140] [2022-04-06 20:36:04,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158291140] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:04,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569112002] [2022-04-06 20:36:04,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:04,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:04,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:04,937 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 20:36:04,943 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 20:36:05,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:36:05,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12105 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 11926 trivial. 0 not checked. [2022-04-06 20:36:05,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12105 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 11926 trivial. 0 not checked. [2022-04-06 20:36:06,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569112002] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:06,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:06,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 6, 6] total 99 [2022-04-06 20:36:06,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:06,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [227498892] [2022-04-06 20:36:06,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [227498892] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:06,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:06,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 20:36:06,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880598752] [2022-04-06 20:36:06,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:06,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 20:36:06,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:06,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 20:36:06,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=9414, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:36:06,159 INFO L87 Difference]: Start difference. First operand 283 states and 285 transitions. Second operand has 93 states, 93 states have (on average 2.978494623655914) internal successors, (277), 92 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:15,746 INFO L93 Difference]: Finished difference Result 295 states and 299 transitions. [2022-04-06 20:36:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 20:36:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.978494623655914) internal successors, (277), 92 states have internal predecessors, (277), 2 states have call successors, (3), 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 281 [2022-04-06 20:36:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:15,747 INFO L225 Difference]: With dead ends: 295 [2022-04-06 20:36:15,747 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 20:36:15,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 558 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4013 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=826, Invalid=34706, Unknown=0, NotChecked=0, Total=35532 [2022-04-06 20:36:15,748 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 279 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 24006 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 24187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 24006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:15,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 139 Invalid, 24187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 24006 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-04-06 20:36:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 20:36:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2022-04-06 20:36:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.01067615658363) internal successors, (284), 281 states have internal predecessors, (284), 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 20:36:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 288 transitions. [2022-04-06 20:36:15,814 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 288 transitions. Word has length 281 [2022-04-06 20:36:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:15,814 INFO L478 AbstractCegarLoop]: Abstraction has 286 states and 288 transitions. [2022-04-06 20:36:15,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.978494623655914) internal successors, (277), 92 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 288 transitions. [2022-04-06 20:36:15,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-04-06 20:36:15,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:15,815 INFO L499 BasicCegarLoop]: trace histogram [91, 91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:15,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 20:36:16,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-04-06 20:36:16,016 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1279875893, now seen corresponding path program 179 times [2022-04-06 20:36:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2118892571] [2022-04-06 20:36:16,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:16,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:16,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1279875893, now seen corresponding path program 180 times [2022-04-06 20:36:16,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:16,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038660014] [2022-04-06 20:36:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:16,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:18,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 181 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:18,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:18,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038660014] [2022-04-06 20:36:18,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038660014] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:18,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990708716] [2022-04-06 20:36:18,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:18,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:18,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:18,925 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 20:36:18,925 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 20:36:18,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:18,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:18,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:36:18,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 12195 trivial. 0 not checked. [2022-04-06 20:36:19,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 12195 trivial. 0 not checked. [2022-04-06 20:36:20,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990708716] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:20,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:20,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 6, 6] total 100 [2022-04-06 20:36:20,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:20,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2118892571] [2022-04-06 20:36:20,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2118892571] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:20,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:20,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 20:36:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632841377] [2022-04-06 20:36:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:20,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 20:36:20,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 20:36:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=9609, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:36:20,087 INFO L87 Difference]: Start difference. First operand 286 states and 288 transitions. Second operand has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 93 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:29,917 INFO L93 Difference]: Finished difference Result 298 states and 302 transitions. [2022-04-06 20:36:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 20:36:29,917 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 93 states have internal predecessors, (280), 2 states have call successors, (3), 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 284 [2022-04-06 20:36:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:29,918 INFO L225 Difference]: With dead ends: 298 [2022-04-06 20:36:29,918 INFO L226 Difference]: Without dead ends: 290 [2022-04-06 20:36:29,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 564 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4103 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=835, Invalid=35455, Unknown=0, NotChecked=0, Total=36290 [2022-04-06 20:36:29,919 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24400 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 24583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 24400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:29,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 19 Invalid, 24583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 24400 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-04-06 20:36:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-04-06 20:36:29,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2022-04-06 20:36:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0105633802816902) internal successors, (287), 284 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 20:36:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 291 transitions. [2022-04-06 20:36:29,993 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 291 transitions. Word has length 284 [2022-04-06 20:36:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:29,993 INFO L478 AbstractCegarLoop]: Abstraction has 289 states and 291 transitions. [2022-04-06 20:36:29,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.978723404255319) internal successors, (280), 93 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 291 transitions. [2022-04-06 20:36:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-04-06 20:36:29,994 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:29,994 INFO L499 BasicCegarLoop]: trace histogram [92, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:30,010 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 20:36:30,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:30,194 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:30,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:30,195 INFO L85 PathProgramCache]: Analyzing trace with hash -166275135, now seen corresponding path program 181 times [2022-04-06 20:36:30,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:30,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1958989754] [2022-04-06 20:36:30,196 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:30,196 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:30,196 INFO L85 PathProgramCache]: Analyzing trace with hash -166275135, now seen corresponding path program 182 times [2022-04-06 20:36:30,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:30,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661656116] [2022-04-06 20:36:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:30,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:33,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12650 backedges. 183 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:33,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:33,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661656116] [2022-04-06 20:36:33,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661656116] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:33,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090766141] [2022-04-06 20:36:33,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:33,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:33,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:33,146 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 20:36:33,147 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 20:36:33,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:33,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:36:33,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12650 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 12467 trivial. 0 not checked. [2022-04-06 20:36:33,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12650 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 12467 trivial. 0 not checked. [2022-04-06 20:36:34,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090766141] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:34,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:34,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 6, 6] total 101 [2022-04-06 20:36:34,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:34,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1958989754] [2022-04-06 20:36:34,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1958989754] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:34,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:34,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 20:36:34,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212539365] [2022-04-06 20:36:34,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:34,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 20:36:34,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 20:36:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=9806, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:36:34,371 INFO L87 Difference]: Start difference. First operand 289 states and 291 transitions. Second operand has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:44,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:44,441 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2022-04-06 20:36:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 20:36:44,441 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 2 states have call successors, (3), 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 287 [2022-04-06 20:36:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:44,442 INFO L225 Difference]: With dead ends: 301 [2022-04-06 20:36:44,442 INFO L226 Difference]: Without dead ends: 293 [2022-04-06 20:36:44,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 570 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4194 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=844, Invalid=36212, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:36:44,443 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 285 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 25256 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 25441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 25256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:44,444 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 279 Invalid, 25441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 25256 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-04-06 20:36:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-04-06 20:36:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2022-04-06 20:36:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.0104529616724738) internal successors, (290), 287 states have internal predecessors, (290), 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 20:36:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 294 transitions. [2022-04-06 20:36:44,518 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 294 transitions. Word has length 287 [2022-04-06 20:36:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:44,519 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 294 transitions. [2022-04-06 20:36:44,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 294 transitions. [2022-04-06 20:36:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-04-06 20:36:44,520 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:44,520 INFO L499 BasicCegarLoop]: trace histogram [93, 93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:44,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:44,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:44,720 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash 786512139, now seen corresponding path program 183 times [2022-04-06 20:36:44,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:44,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [585264486] [2022-04-06 20:36:44,722 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:44,722 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:44,722 INFO L85 PathProgramCache]: Analyzing trace with hash 786512139, now seen corresponding path program 184 times [2022-04-06 20:36:44,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:44,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678788735] [2022-04-06 20:36:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:44,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:47,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 185 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:47,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:47,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678788735] [2022-04-06 20:36:47,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678788735] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:47,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578507730] [2022-04-06 20:36:47,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:47,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:47,735 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 20:36:47,735 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 20:36:47,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:47,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:36:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 12742 trivial. 0 not checked. [2022-04-06 20:36:48,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 12742 trivial. 0 not checked. [2022-04-06 20:36:48,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578507730] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:48,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:48,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 6, 6] total 102 [2022-04-06 20:36:48,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [585264486] [2022-04-06 20:36:48,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [585264486] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:48,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:48,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 20:36:48,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94089151] [2022-04-06 20:36:48,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:48,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 20:36:48,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 20:36:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=10005, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:36:48,983 INFO L87 Difference]: Start difference. First operand 292 states and 294 transitions. Second operand has 96 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 95 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:59,216 INFO L93 Difference]: Finished difference Result 304 states and 308 transitions. [2022-04-06 20:36:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 20:36:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 95 states have internal predecessors, (286), 2 states have call successors, (3), 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 290 [2022-04-06 20:36:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:59,217 INFO L225 Difference]: With dead ends: 304 [2022-04-06 20:36:59,217 INFO L226 Difference]: Without dead ends: 296 [2022-04-06 20:36:59,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 576 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4286 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=853, Invalid=36977, Unknown=0, NotChecked=0, Total=37830 [2022-04-06 20:36:59,219 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 288 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 25578 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 25765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 25578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:59,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 89 Invalid, 25765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 25578 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-04-06 20:36:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-04-06 20:36:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2022-04-06 20:36:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 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 20:36:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2022-04-06 20:36:59,288 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 290 [2022-04-06 20:36:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:59,289 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2022-04-06 20:36:59,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 95 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2022-04-06 20:36:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-04-06 20:36:59,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:59,290 INFO L499 BasicCegarLoop]: trace histogram [94, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:59,306 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 20:36:59,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:59,490 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash -166667391, now seen corresponding path program 185 times [2022-04-06 20:36:59,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:59,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1513234691] [2022-04-06 20:36:59,492 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:59,492 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -166667391, now seen corresponding path program 186 times [2022-04-06 20:36:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:59,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602884339] [2022-04-06 20:36:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:02,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 187 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:02,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:02,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602884339] [2022-04-06 20:37:02,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602884339] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:02,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707665693] [2022-04-06 20:37:02,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:02,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:02,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:02,665 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 20:37:02,665 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 20:37:02,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:02,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:37:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 13020 trivial. 0 not checked. [2022-04-06 20:37:03,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13207 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 13020 trivial. 0 not checked. [2022-04-06 20:37:03,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707665693] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:03,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:03,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 6, 6] total 103 [2022-04-06 20:37:03,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:03,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1513234691] [2022-04-06 20:37:03,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1513234691] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:03,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:03,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 20:37:03,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836351559] [2022-04-06 20:37:03,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:03,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 20:37:03,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 20:37:03,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=10206, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:37:03,871 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:14,495 INFO L93 Difference]: Finished difference Result 307 states and 311 transitions. [2022-04-06 20:37:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 20:37:14,495 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 2 states have call successors, (3), 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 293 [2022-04-06 20:37:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:14,496 INFO L225 Difference]: With dead ends: 307 [2022-04-06 20:37:14,496 INFO L226 Difference]: Without dead ends: 299 [2022-04-06 20:37:14,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 582 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4379 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=862, Invalid=37750, Unknown=0, NotChecked=0, Total=38612 [2022-04-06 20:37:14,498 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 291 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 26098 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 26287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 26098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:14,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 59 Invalid, 26287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 26098 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-04-06 20:37:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-04-06 20:37:14,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2022-04-06 20:37:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.0102389078498293) internal successors, (296), 293 states have internal predecessors, (296), 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 20:37:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 300 transitions. [2022-04-06 20:37:14,577 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 300 transitions. Word has length 293 [2022-04-06 20:37:14,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:14,577 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 300 transitions. [2022-04-06 20:37:14,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.979381443298969) internal successors, (289), 96 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 300 transitions. [2022-04-06 20:37:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-04-06 20:37:14,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:14,578 INFO L499 BasicCegarLoop]: trace histogram [95, 95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:14,594 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 20:37:14,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:14,779 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:14,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1985715531, now seen corresponding path program 187 times [2022-04-06 20:37:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:14,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [908234657] [2022-04-06 20:37:14,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:14,780 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:14,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1985715531, now seen corresponding path program 188 times [2022-04-06 20:37:14,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:14,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695183941] [2022-04-06 20:37:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:14,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:17,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13490 backedges. 189 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:17,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:17,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695183941] [2022-04-06 20:37:17,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695183941] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:17,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393676390] [2022-04-06 20:37:17,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:17,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:17,988 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 20:37:17,988 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 20:37:18,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:18,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:18,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:37:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13490 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 13301 trivial. 0 not checked. [2022-04-06 20:37:18,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13490 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 13301 trivial. 0 not checked. [2022-04-06 20:37:19,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393676390] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:19,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:19,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 6, 6] total 104 [2022-04-06 20:37:19,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:19,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [908234657] [2022-04-06 20:37:19,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [908234657] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:19,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:19,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 20:37:19,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339343251] [2022-04-06 20:37:19,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:19,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 20:37:19,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:19,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 20:37:19,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=10409, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:37:19,284 INFO L87 Difference]: Start difference. First operand 298 states and 300 transitions. Second operand has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:30,035 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2022-04-06 20:37:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 20:37:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 2 states have call successors, (3), 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 296 [2022-04-06 20:37:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:30,036 INFO L225 Difference]: With dead ends: 310 [2022-04-06 20:37:30,036 INFO L226 Difference]: Without dead ends: 302 [2022-04-06 20:37:30,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 588 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4473 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=871, Invalid=38531, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:37:30,038 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 294 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26636 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 26636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:30,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 39 Invalid, 26827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 26636 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-04-06 20:37:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-04-06 20:37:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2022-04-06 20:37:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.010135135135135) internal successors, (299), 296 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 20:37:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 303 transitions. [2022-04-06 20:37:30,123 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 303 transitions. Word has length 296 [2022-04-06 20:37:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:30,123 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 303 transitions. [2022-04-06 20:37:30,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.979591836734694) internal successors, (292), 97 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 303 transitions. [2022-04-06 20:37:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-04-06 20:37:30,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:30,125 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:30,141 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 20:37:30,325 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,SelfDestructingSolverStorable96 [2022-04-06 20:37:30,325 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:30,325 INFO L85 PathProgramCache]: Analyzing trace with hash -236384447, now seen corresponding path program 189 times [2022-04-06 20:37:30,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:30,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [662139394] [2022-04-06 20:37:30,327 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:30,327 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -236384447, now seen corresponding path program 190 times [2022-04-06 20:37:30,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:30,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423973408] [2022-04-06 20:37:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:30,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:33,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13776 backedges. 191 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:33,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:33,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423973408] [2022-04-06 20:37:33,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423973408] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:33,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930366128] [2022-04-06 20:37:33,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:33,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:33,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:33,595 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 20:37:33,596 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 20:37:33,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:33,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:33,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:37:33,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13776 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 13585 trivial. 0 not checked. [2022-04-06 20:37:34,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13776 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 13585 trivial. 0 not checked. [2022-04-06 20:37:34,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930366128] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:34,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:34,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 6, 6] total 105 [2022-04-06 20:37:34,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [662139394] [2022-04-06 20:37:34,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [662139394] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:34,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:34,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 20:37:34,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590576626] [2022-04-06 20:37:34,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:34,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 20:37:34,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:34,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 20:37:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=10614, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:37:34,884 INFO L87 Difference]: Start difference. First operand 301 states and 303 transitions. Second operand has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 98 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:45,863 INFO L93 Difference]: Finished difference Result 313 states and 317 transitions. [2022-04-06 20:37:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 20:37:45,863 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 98 states have internal predecessors, (295), 2 states have call successors, (3), 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 299 [2022-04-06 20:37:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:45,864 INFO L225 Difference]: With dead ends: 313 [2022-04-06 20:37:45,864 INFO L226 Difference]: Without dead ends: 305 [2022-04-06 20:37:45,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 594 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4568 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=880, Invalid=39320, Unknown=0, NotChecked=0, Total=40200 [2022-04-06 20:37:45,867 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 297 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 27246 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 27439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 27246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:45,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 74 Invalid, 27439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 27246 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-04-06 20:37:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-04-06 20:37:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2022-04-06 20:37:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.0100334448160535) internal successors, (302), 299 states have internal predecessors, (302), 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 20:37:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 306 transitions. [2022-04-06 20:37:45,941 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 306 transitions. Word has length 299 [2022-04-06 20:37:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:45,941 INFO L478 AbstractCegarLoop]: Abstraction has 304 states and 306 transitions. [2022-04-06 20:37:45,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 98 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 306 transitions. [2022-04-06 20:37:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-04-06 20:37:45,942 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:45,942 INFO L499 BasicCegarLoop]: trace histogram [97, 97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:45,958 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 20:37:46,142 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,SelfDestructingSolverStorable97 [2022-04-06 20:37:46,143 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:46,143 INFO L85 PathProgramCache]: Analyzing trace with hash -485895797, now seen corresponding path program 191 times [2022-04-06 20:37:46,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:46,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1855456318] [2022-04-06 20:37:46,144 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:46,144 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash -485895797, now seen corresponding path program 192 times [2022-04-06 20:37:46,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:46,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414236682] [2022-04-06 20:37:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:46,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:49,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14065 backedges. 193 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:49,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:49,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414236682] [2022-04-06 20:37:49,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414236682] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:49,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116652785] [2022-04-06 20:37:49,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:49,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:49,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:49,418 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 20:37:49,419 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 20:37:49,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:49,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:49,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:37:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14065 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 13872 trivial. 0 not checked. [2022-04-06 20:37:50,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14065 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 13872 trivial. 0 not checked. [2022-04-06 20:37:50,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116652785] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:50,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:50,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 6, 6] total 106 [2022-04-06 20:37:50,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:50,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1855456318] [2022-04-06 20:37:50,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1855456318] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:50,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:50,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 20:37:50,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567129371] [2022-04-06 20:37:50,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:50,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 20:37:50,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:50,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 20:37:50,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=10821, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:37:50,678 INFO L87 Difference]: Start difference. First operand 304 states and 306 transitions. Second operand has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:01,974 INFO L93 Difference]: Finished difference Result 316 states and 320 transitions. [2022-04-06 20:38:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 20:38:01,975 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (3), 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 302 [2022-04-06 20:38:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:01,975 INFO L225 Difference]: With dead ends: 316 [2022-04-06 20:38:01,975 INFO L226 Difference]: Without dead ends: 308 [2022-04-06 20:38:01,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 600 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4664 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=889, Invalid=40117, Unknown=0, NotChecked=0, Total=41006 [2022-04-06 20:38:01,977 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 300 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 28222 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 28417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 28222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:01,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 409 Invalid, 28417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 28222 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-04-06 20:38:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-04-06 20:38:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2022-04-06 20:38:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.009933774834437) internal successors, (305), 302 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 20:38:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 309 transitions. [2022-04-06 20:38:02,060 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 309 transitions. Word has length 302 [2022-04-06 20:38:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:02,060 INFO L478 AbstractCegarLoop]: Abstraction has 307 states and 309 transitions. [2022-04-06 20:38:02,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 309 transitions. [2022-04-06 20:38:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-04-06 20:38:02,061 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:02,062 INFO L499 BasicCegarLoop]: trace histogram [98, 98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:02,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 20:38:02,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:02,264 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 909865729, now seen corresponding path program 193 times [2022-04-06 20:38:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:02,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [106675314] [2022-04-06 20:38:02,265 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:02,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:02,265 INFO L85 PathProgramCache]: Analyzing trace with hash 909865729, now seen corresponding path program 194 times [2022-04-06 20:38:02,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:02,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546461730] [2022-04-06 20:38:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:02,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:05,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14357 backedges. 195 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:05,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:05,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546461730] [2022-04-06 20:38:05,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546461730] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:05,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842991337] [2022-04-06 20:38:05,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:05,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:05,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:05,594 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 20:38:05,598 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 20:38:05,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:05,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:05,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:38:05,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14357 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 14162 trivial. 0 not checked. [2022-04-06 20:38:06,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14357 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 14162 trivial. 0 not checked. [2022-04-06 20:38:06,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842991337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:06,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:06,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 6, 6] total 107 [2022-04-06 20:38:06,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:06,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [106675314] [2022-04-06 20:38:06,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [106675314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:06,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:06,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 20:38:06,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503424079] [2022-04-06 20:38:06,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:06,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 20:38:06,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:06,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 20:38:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=11030, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:38:06,921 INFO L87 Difference]: Start difference. First operand 307 states and 309 transitions. Second operand has 101 states, 101 states have (on average 2.98019801980198) internal successors, (301), 100 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:18,316 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2022-04-06 20:38:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 20:38:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.98019801980198) internal successors, (301), 100 states have internal predecessors, (301), 2 states have call successors, (3), 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 305 [2022-04-06 20:38:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:18,318 INFO L225 Difference]: With dead ends: 319 [2022-04-06 20:38:18,318 INFO L226 Difference]: Without dead ends: 311 [2022-04-06 20:38:18,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 606 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4761 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=898, Invalid=40922, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 20:38:18,320 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 303 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 28472 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 28669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 28472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:18,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 134 Invalid, 28669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 28472 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-04-06 20:38:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-04-06 20:38:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2022-04-06 20:38:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.0098360655737706) internal successors, (308), 305 states have internal predecessors, (308), 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 20:38:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 312 transitions. [2022-04-06 20:38:18,403 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 312 transitions. Word has length 305 [2022-04-06 20:38:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:18,403 INFO L478 AbstractCegarLoop]: Abstraction has 310 states and 312 transitions. [2022-04-06 20:38:18,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.98019801980198) internal successors, (301), 100 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 312 transitions. [2022-04-06 20:38:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-04-06 20:38:18,404 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:18,404 INFO L499 BasicCegarLoop]: trace histogram [99, 99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:18,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-04-06 20:38:18,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:18,604 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:18,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:18,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1831873077, now seen corresponding path program 195 times [2022-04-06 20:38:18,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:18,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123902406] [2022-04-06 20:38:18,606 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:18,606 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:18,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1831873077, now seen corresponding path program 196 times [2022-04-06 20:38:18,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:18,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180034864] [2022-04-06 20:38:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:18,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:22,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14652 backedges. 197 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:22,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:22,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180034864] [2022-04-06 20:38:22,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180034864] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:22,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736323690] [2022-04-06 20:38:22,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:22,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:22,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:22,051 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 20:38:22,052 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 20:38:22,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:22,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:22,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:38:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14652 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 14455 trivial. 0 not checked. [2022-04-06 20:38:22,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14652 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 14455 trivial. 0 not checked. [2022-04-06 20:38:23,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736323690] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:23,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:23,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 6, 6] total 108 [2022-04-06 20:38:23,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:23,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123902406] [2022-04-06 20:38:23,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123902406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:23,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:23,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 20:38:23,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617793546] [2022-04-06 20:38:23,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:23,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 20:38:23,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:23,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 20:38:23,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=11241, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:38:23,358 INFO L87 Difference]: Start difference. First operand 310 states and 312 transitions. Second operand has 102 states, 102 states have (on average 2.980392156862745) internal successors, (304), 101 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:35,098 INFO L93 Difference]: Finished difference Result 322 states and 326 transitions. [2022-04-06 20:38:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 20:38:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.980392156862745) internal successors, (304), 101 states have internal predecessors, (304), 2 states have call successors, (3), 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 308 [2022-04-06 20:38:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:35,099 INFO L225 Difference]: With dead ends: 322 [2022-04-06 20:38:35,099 INFO L226 Difference]: Without dead ends: 314 [2022-04-06 20:38:35,101 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 612 SyntacticMatches, 2 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4859 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=907, Invalid=41735, Unknown=0, NotChecked=0, Total=42642 [2022-04-06 20:38:35,101 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 306 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 29460 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 29659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 29460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:35,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 469 Invalid, 29659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 29460 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-04-06 20:38:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-04-06 20:38:35,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2022-04-06 20:38:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0097402597402598) internal successors, (311), 308 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 20:38:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 315 transitions. [2022-04-06 20:38:35,186 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 315 transitions. Word has length 308 [2022-04-06 20:38:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:35,186 INFO L478 AbstractCegarLoop]: Abstraction has 313 states and 315 transitions. [2022-04-06 20:38:35,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.980392156862745) internal successors, (304), 101 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 315 transitions. [2022-04-06 20:38:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-04-06 20:38:35,188 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:35,188 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:35,206 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 20:38:35,404 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,SelfDestructingSolverStorable100 [2022-04-06 20:38:35,404 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:35,404 INFO L85 PathProgramCache]: Analyzing trace with hash 715392705, now seen corresponding path program 197 times [2022-04-06 20:38:35,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:35,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1061608391] [2022-04-06 20:38:35,406 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:35,406 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:35,406 INFO L85 PathProgramCache]: Analyzing trace with hash 715392705, now seen corresponding path program 198 times [2022-04-06 20:38:35,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:35,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181972063] [2022-04-06 20:38:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:35,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:38,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14950 backedges. 199 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:38,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181972063] [2022-04-06 20:38:38,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181972063] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027016525] [2022-04-06 20:38:38,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:38,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:38,938 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 20:38:38,938 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 20:38:38,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:38,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:38,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:38:38,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14950 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 14751 trivial. 0 not checked. [2022-04-06 20:38:39,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14950 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 14751 trivial. 0 not checked. [2022-04-06 20:38:40,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027016525] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:40,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:40,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 6, 6] total 109 [2022-04-06 20:38:40,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:40,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1061608391] [2022-04-06 20:38:40,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1061608391] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:40,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:40,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 20:38:40,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148922501] [2022-04-06 20:38:40,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:40,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 20:38:40,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 20:38:40,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=11454, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:38:40,232 INFO L87 Difference]: Start difference. First operand 313 states and 315 transitions. Second operand has 103 states, 103 states have (on average 2.9805825242718447) internal successors, (307), 102 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:52,257 INFO L93 Difference]: Finished difference Result 325 states and 329 transitions. [2022-04-06 20:38:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 20:38:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.9805825242718447) internal successors, (307), 102 states have internal predecessors, (307), 2 states have call successors, (3), 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 311 [2022-04-06 20:38:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:52,258 INFO L225 Difference]: With dead ends: 325 [2022-04-06 20:38:52,258 INFO L226 Difference]: Without dead ends: 317 [2022-04-06 20:38:52,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 618 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4958 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=916, Invalid=42556, Unknown=0, NotChecked=0, Total=43472 [2022-04-06 20:38:52,259 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 309 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 29944 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 30145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 29944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:52,260 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 379 Invalid, 30145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 29944 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-04-06 20:38:52,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-04-06 20:38:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2022-04-06 20:38:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.0096463022508038) internal successors, (314), 311 states have internal predecessors, (314), 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 20:38:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 318 transitions. [2022-04-06 20:38:52,349 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 318 transitions. Word has length 311 [2022-04-06 20:38:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:52,349 INFO L478 AbstractCegarLoop]: Abstraction has 316 states and 318 transitions. [2022-04-06 20:38:52,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.9805825242718447) internal successors, (307), 102 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 318 transitions. [2022-04-06 20:38:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-04-06 20:38:52,350 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:52,350 INFO L499 BasicCegarLoop]: trace histogram [101, 101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:52,366 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 20:38:52,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:52,551 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1466848757, now seen corresponding path program 199 times [2022-04-06 20:38:52,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:52,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123306359] [2022-04-06 20:38:52,552 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:52,552 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:52,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1466848757, now seen corresponding path program 200 times [2022-04-06 20:38:52,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:52,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848916525] [2022-04-06 20:38:52,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:52,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:56,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15251 backedges. 201 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:56,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:56,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848916525] [2022-04-06 20:38:56,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848916525] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:56,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365804305] [2022-04-06 20:38:56,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:56,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:56,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:56,095 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 20:38:56,095 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 20:38:56,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:56,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:56,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:38:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15251 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 15050 trivial. 0 not checked. [2022-04-06 20:38:56,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15251 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 15050 trivial. 0 not checked. [2022-04-06 20:38:57,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365804305] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:57,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:57,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 6, 6] total 110 [2022-04-06 20:38:57,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:57,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123306359] [2022-04-06 20:38:57,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123306359] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:57,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:57,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 20:38:57,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533045938] [2022-04-06 20:38:57,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:57,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-06 20:38:57,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:57,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-06 20:38:57,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=11669, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:38:57,448 INFO L87 Difference]: Start difference. First operand 316 states and 318 transitions. Second operand has 104 states, 104 states have (on average 2.980769230769231) internal successors, (310), 103 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:09,797 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2022-04-06 20:39:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 20:39:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.980769230769231) internal successors, (310), 103 states have internal predecessors, (310), 2 states have call successors, (3), 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 314 [2022-04-06 20:39:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:09,798 INFO L225 Difference]: With dead ends: 328 [2022-04-06 20:39:09,798 INFO L226 Difference]: Without dead ends: 320 [2022-04-06 20:39:09,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 624 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5058 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=925, Invalid=43385, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 20:39:09,800 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 312 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 30638 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 30841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 30638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:09,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 459 Invalid, 30841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 30638 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-04-06 20:39:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-04-06 20:39:09,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2022-04-06 20:39:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.0095541401273886) internal successors, (317), 314 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 20:39:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 321 transitions. [2022-04-06 20:39:09,881 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 321 transitions. Word has length 314 [2022-04-06 20:39:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:09,881 INFO L478 AbstractCegarLoop]: Abstraction has 319 states and 321 transitions. [2022-04-06 20:39:09,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.980769230769231) internal successors, (310), 103 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 321 transitions. [2022-04-06 20:39:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-04-06 20:39:09,882 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:09,882 INFO L499 BasicCegarLoop]: trace histogram [102, 102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:09,898 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 20:39:10,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 20:39:10,083 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:10,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash 297716353, now seen corresponding path program 201 times [2022-04-06 20:39:10,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:10,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [851819043] [2022-04-06 20:39:10,085 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:10,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash 297716353, now seen corresponding path program 202 times [2022-04-06 20:39:10,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:10,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885088190] [2022-04-06 20:39:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:10,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:13,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15555 backedges. 203 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:13,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:13,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885088190] [2022-04-06 20:39:13,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885088190] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:13,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111243965] [2022-04-06 20:39:13,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:13,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:13,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:13,709 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 20:39:13,710 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 20:39:13,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:13,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:13,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:39:13,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15555 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 15352 trivial. 0 not checked. [2022-04-06 20:39:14,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15555 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 15352 trivial. 0 not checked. [2022-04-06 20:39:15,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111243965] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:15,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:15,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 6, 6] total 111 [2022-04-06 20:39:15,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:15,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [851819043] [2022-04-06 20:39:15,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [851819043] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:15,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:15,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-04-06 20:39:15,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876135727] [2022-04-06 20:39:15,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:15,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-06 20:39:15,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:15,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-06 20:39:15,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=11886, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:39:15,067 INFO L87 Difference]: Start difference. First operand 319 states and 321 transitions. Second operand has 105 states, 105 states have (on average 2.980952380952381) internal successors, (313), 104 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:27,395 INFO L93 Difference]: Finished difference Result 331 states and 335 transitions. [2022-04-06 20:39:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 20:39:27,395 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.980952380952381) internal successors, (313), 104 states have internal predecessors, (313), 2 states have call successors, (3), 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 317 [2022-04-06 20:39:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:27,396 INFO L225 Difference]: With dead ends: 331 [2022-04-06 20:39:27,396 INFO L226 Difference]: Without dead ends: 323 [2022-04-06 20:39:27,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 630 SyntacticMatches, 2 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5159 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=934, Invalid=44222, Unknown=0, NotChecked=0, Total=45156 [2022-04-06 20:39:27,398 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 315 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 30930 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 31135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 30930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:27,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 199 Invalid, 31135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 30930 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-04-06 20:39:27,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-04-06 20:39:27,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2022-04-06 20:39:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 317 states have (on average 1.0094637223974763) internal successors, (320), 317 states have internal predecessors, (320), 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 20:39:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 324 transitions. [2022-04-06 20:39:27,491 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 324 transitions. Word has length 317 [2022-04-06 20:39:27,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:27,491 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 324 transitions. [2022-04-06 20:39:27,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.980952380952381) internal successors, (313), 104 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:27,491 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 324 transitions. [2022-04-06 20:39:27,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-04-06 20:39:27,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:27,492 INFO L499 BasicCegarLoop]: trace histogram [103, 103, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:27,510 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 20:39:27,692 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,SelfDestructingSolverStorable103 [2022-04-06 20:39:27,692 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:27,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1942794677, now seen corresponding path program 203 times [2022-04-06 20:39:27,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:27,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1889736563] [2022-04-06 20:39:27,694 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:27,694 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1942794677, now seen corresponding path program 204 times [2022-04-06 20:39:27,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:27,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731036736] [2022-04-06 20:39:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:27,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:31,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15862 backedges. 205 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:31,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:31,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731036736] [2022-04-06 20:39:31,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731036736] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:31,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751208950] [2022-04-06 20:39:31,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:31,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:31,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:31,354 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 20:39:31,354 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 20:39:31,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:39:31,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:31,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:39:31,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15862 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 15657 trivial. 0 not checked. [2022-04-06 20:39:32,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15862 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 15657 trivial. 0 not checked. [2022-04-06 20:39:32,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751208950] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:32,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:32,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 6, 6] total 112 [2022-04-06 20:39:32,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:32,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1889736563] [2022-04-06 20:39:32,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1889736563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:32,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:32,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-04-06 20:39:32,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976197553] [2022-04-06 20:39:32,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:32,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-04-06 20:39:32,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-04-06 20:39:32,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=12105, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:39:32,664 INFO L87 Difference]: Start difference. First operand 322 states and 324 transitions. Second operand has 106 states, 106 states have (on average 2.981132075471698) internal successors, (316), 105 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:45,177 INFO L93 Difference]: Finished difference Result 334 states and 338 transitions. [2022-04-06 20:39:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 20:39:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.981132075471698) internal successors, (316), 105 states have internal predecessors, (316), 2 states have call successors, (3), 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 320 [2022-04-06 20:39:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:45,178 INFO L225 Difference]: With dead ends: 334 [2022-04-06 20:39:45,178 INFO L226 Difference]: Without dead ends: 326 [2022-04-06 20:39:45,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 636 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5261 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=943, Invalid=45067, Unknown=0, NotChecked=0, Total=46010 [2022-04-06 20:39:45,180 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 318 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 31516 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 31723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 31516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:45,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 179 Invalid, 31723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 31516 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-04-06 20:39:45,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-04-06 20:39:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2022-04-06 20:39:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.009375) internal successors, (323), 320 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 20:39:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 327 transitions. [2022-04-06 20:39:45,265 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 327 transitions. Word has length 320 [2022-04-06 20:39:45,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:45,265 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 327 transitions. [2022-04-06 20:39:45,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.981132075471698) internal successors, (316), 105 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 327 transitions. [2022-04-06 20:39:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-04-06 20:39:45,266 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:45,266 INFO L499 BasicCegarLoop]: trace histogram [104, 104, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:45,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-06 20:39:45,482 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,SelfDestructingSolverStorable104 [2022-04-06 20:39:45,482 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:45,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:45,482 INFO L85 PathProgramCache]: Analyzing trace with hash -920142271, now seen corresponding path program 205 times [2022-04-06 20:39:45,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:45,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2020467525] [2022-04-06 20:39:45,483 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:45,483 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash -920142271, now seen corresponding path program 206 times [2022-04-06 20:39:45,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:45,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029866135] [2022-04-06 20:39:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:49,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16172 backedges. 207 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:49,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:49,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029866135] [2022-04-06 20:39:49,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029866135] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:49,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720264412] [2022-04-06 20:39:49,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:49,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:49,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:49,214 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 20:39:49,215 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 20:39:49,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:49,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:49,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:39:49,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16172 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 15965 trivial. 0 not checked. [2022-04-06 20:39:49,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16172 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 15965 trivial. 0 not checked. [2022-04-06 20:39:50,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720264412] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:50,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:50,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 6, 6] total 113 [2022-04-06 20:39:50,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:50,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2020467525] [2022-04-06 20:39:50,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2020467525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:50,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:50,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-04-06 20:39:50,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409066751] [2022-04-06 20:39:50,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:50,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-04-06 20:39:50,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-04-06 20:39:50,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=12326, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:39:50,610 INFO L87 Difference]: Start difference. First operand 325 states and 327 transitions. Second operand has 107 states, 107 states have (on average 2.9813084112149535) internal successors, (319), 106 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:03,609 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2022-04-06 20:40:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-04-06 20:40:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.9813084112149535) internal successors, (319), 106 states have internal predecessors, (319), 2 states have call successors, (3), 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 323 [2022-04-06 20:40:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:03,610 INFO L225 Difference]: With dead ends: 337 [2022-04-06 20:40:03,610 INFO L226 Difference]: Without dead ends: 329 [2022-04-06 20:40:03,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 642 SyntacticMatches, 2 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5364 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=952, Invalid=45920, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 20:40:03,612 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 321 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 32222 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 32431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 32222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:03,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 254 Invalid, 32431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 32222 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-04-06 20:40:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-04-06 20:40:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2022-04-06 20:40:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 323 states have (on average 1.0092879256965945) internal successors, (326), 323 states have internal predecessors, (326), 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 20:40:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2022-04-06 20:40:03,713 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 323 [2022-04-06 20:40:03,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:03,713 INFO L478 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2022-04-06 20:40:03,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.9813084112149535) internal successors, (319), 106 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:03,713 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2022-04-06 20:40:03,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-04-06 20:40:03,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:03,714 INFO L499 BasicCegarLoop]: trace histogram [105, 105, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:03,730 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 20:40:03,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:03,919 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash 714654347, now seen corresponding path program 207 times [2022-04-06 20:40:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:03,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [765620368] [2022-04-06 20:40:03,920 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:03,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:03,921 INFO L85 PathProgramCache]: Analyzing trace with hash 714654347, now seen corresponding path program 208 times [2022-04-06 20:40:03,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:03,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052676306] [2022-04-06 20:40:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:03,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat