/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-simple/deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:02:30,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:02:30,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:02:30,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:02:30,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:02:30,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:02:30,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:02:30,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:02:30,756 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:02:30,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:02:30,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:02:30,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:02:30,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:02:30,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:02:30,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:02:30,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:02:30,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:02:30,759 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:02:30,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:02:30,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:02:30,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:02:30,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:02:30,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:02:30,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:02:30,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:02:30,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:02:30,761 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:02:30,761 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:02:30,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:02:30,761 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:02:30,761 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:02:30,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:02:30,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:02:30,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:02:30,964 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:02:30,964 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:02:30,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2022-04-06 21:02:31,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40dc5d5bb/5fbd37b88e1a44cca208149019b49a1a/FLAG70f4c57bf [2022-04-06 21:02:31,370 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:02:31,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c [2022-04-06 21:02:31,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40dc5d5bb/5fbd37b88e1a44cca208149019b49a1a/FLAG70f4c57bf [2022-04-06 21:02:31,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40dc5d5bb/5fbd37b88e1a44cca208149019b49a1a [2022-04-06 21:02:31,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:02:31,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:02:31,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:02:31,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:02:31,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:02:31,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:02:31" (1/1) ... [2022-04-06 21:02:31,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253d5497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31, skipping insertion in model container [2022-04-06 21:02:31,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:02:31" (1/1) ... [2022-04-06 21:02:31,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:02:31,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:02:31,910 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c[625,638] [2022-04-06 21:02:31,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:02:31,920 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:02:31,950 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c[625,638] [2022-04-06 21:02:31,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:02:31,964 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:02:31,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31 WrapperNode [2022-04-06 21:02:31,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:02:31,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:02:31,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:02:31,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:02:31,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31" (1/1) ... [2022-04-06 21:02:31,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31" (1/1) ... [2022-04-06 21:02:31,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31" (1/1) ... [2022-04-06 21:02:31,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31" (1/1) ... [2022-04-06 21:02:31,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31" (1/1) ... [2022-04-06 21:02:31,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31" (1/1) ... [2022-04-06 21:02:31,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31" (1/1) ... [2022-04-06 21:02:31,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:02:31,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:02:31,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:02:31,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:02:31,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31" (1/1) ... [2022-04-06 21:02:32,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:02:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:32,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 21:02:32,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 21:02:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:02:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:02:32,052 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:02:32,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:02:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:02:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:02:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:02:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:02:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:02:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:02:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:02:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:02:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:02:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:02:32,097 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:02:32,098 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:02:32,216 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:02:32,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:02:32,223 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-04-06 21:02:32,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:02:32 BoogieIcfgContainer [2022-04-06 21:02:32,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:02:32,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:02:32,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:02:32,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:02:32,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:02:31" (1/3) ... [2022-04-06 21:02:32,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27a2bdd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:02:32, skipping insertion in model container [2022-04-06 21:02:32,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:02:31" (2/3) ... [2022-04-06 21:02:32,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27a2bdd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:02:32, skipping insertion in model container [2022-04-06 21:02:32,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:02:32" (3/3) ... [2022-04-06 21:02:32,253 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2022-04-06 21:02:32,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:02:32,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:02:32,300 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:02:32,305 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 21:02:32,305 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:02:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:02:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 21:02:32,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:32,322 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:32,323 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:32,327 INFO L85 PathProgramCache]: Analyzing trace with hash 764687304, now seen corresponding path program 1 times [2022-04-06 21:02:32,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:32,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1639736653] [2022-04-06 21:02:32,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:02:32,345 INFO L85 PathProgramCache]: Analyzing trace with hash 764687304, now seen corresponding path program 2 times [2022-04-06 21:02:32,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:32,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357566151] [2022-04-06 21:02:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:32,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:32,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:32,566 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 21:02:32,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:32,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357566151] [2022-04-06 21:02:32,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357566151] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:32,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:32,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:02:32,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:32,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1639736653] [2022-04-06 21:02:32,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1639736653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:32,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:32,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:02:32,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93152221] [2022-04-06 21:02:32,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:32,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:02:32,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:02:32,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:02:32,599 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:32,718 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2022-04-06 21:02:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:02:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 21:02:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:32,729 INFO L225 Difference]: With dead ends: 45 [2022-04-06 21:02:32,729 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 21:02:32,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 21:02:32,734 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:32,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 30 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 21:02:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-06 21:02:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-04-06 21:02:32,768 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2022-04-06 21:02:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:32,768 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-04-06 21:02:32,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-04-06 21:02:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 21:02:32,769 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:32,769 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:32,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:02:32,770 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash 296825287, now seen corresponding path program 1 times [2022-04-06 21:02:32,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:32,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [208453854] [2022-04-06 21:02:32,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:32,788 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:32,788 INFO L85 PathProgramCache]: Analyzing trace with hash 296825287, now seen corresponding path program 2 times [2022-04-06 21:02:32,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:32,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615651292] [2022-04-06 21:02:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:32,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:33,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 21:02:33,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:33,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615651292] [2022-04-06 21:02:33,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615651292] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:33,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:33,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:02:33,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:33,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [208453854] [2022-04-06 21:02:33,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [208453854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:33,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:33,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:02:33,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16280474] [2022-04-06 21:02:33,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:33,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:02:33,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:33,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:02:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:02:33,019 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:33,107 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-04-06 21:02:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:02:33,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 21:02:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:33,108 INFO L225 Difference]: With dead ends: 36 [2022-04-06 21:02:33,108 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 21:02:33,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 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 21:02:33,110 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:33,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:33,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 21:02:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-04-06 21:02:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-04-06 21:02:33,129 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2022-04-06 21:02:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:33,134 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-04-06 21:02:33,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-04-06 21:02:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 21:02:33,136 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:33,136 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:33,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 21:02:33,136 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:33,138 INFO L85 PathProgramCache]: Analyzing trace with hash -17409223, now seen corresponding path program 1 times [2022-04-06 21:02:33,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:33,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [523310640] [2022-04-06 21:02:33,143 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:33,143 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash -17409223, now seen corresponding path program 2 times [2022-04-06 21:02:33,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:33,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341438443] [2022-04-06 21:02:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:33,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:02:33,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:33,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341438443] [2022-04-06 21:02:33,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341438443] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:33,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864374603] [2022-04-06 21:02:33,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:33,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:33,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:33,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:33,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 21:02:33,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 21:02:33,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:33,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:02:33,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 21:02:33,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:02:33,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864374603] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:33,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:02:33,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-04-06 21:02:33,584 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:33,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [523310640] [2022-04-06 21:02:33,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [523310640] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:33,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:33,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:02:33,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072722571] [2022-04-06 21:02:33,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:33,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:02:33,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:33,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:02:33,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:02:33,587 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:33,643 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2022-04-06 21:02:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:02:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 21:02:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:33,646 INFO L225 Difference]: With dead ends: 68 [2022-04-06 21:02:33,646 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 21:02:33,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:02:33,653 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:33,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 21:02:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2022-04-06 21:02:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-04-06 21:02:33,674 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 19 [2022-04-06 21:02:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:33,674 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-04-06 21:02:33,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-04-06 21:02:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 21:02:33,676 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:33,676 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:33,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:33,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:33,900 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1173178741, now seen corresponding path program 1 times [2022-04-06 21:02:33,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:33,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554880443] [2022-04-06 21:02:33,903 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:33,904 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1173178741, now seen corresponding path program 2 times [2022-04-06 21:02:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581107585] [2022-04-06 21:02:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:33,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:34,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:02:34,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:34,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581107585] [2022-04-06 21:02:34,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581107585] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:34,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204712863] [2022-04-06 21:02:34,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:34,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:34,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:34,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:34,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 21:02:34,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 21:02:34,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:02:34,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 21:02:34,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:02:34,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204712863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:34,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:02:34,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-04-06 21:02:34,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:34,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554880443] [2022-04-06 21:02:34,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554880443] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:34,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:34,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:02:34,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713483019] [2022-04-06 21:02:34,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:34,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:02:34,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:34,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:02:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:02:34,214 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:34,268 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2022-04-06 21:02:34,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:02:34,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 21:02:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:34,276 INFO L225 Difference]: With dead ends: 101 [2022-04-06 21:02:34,276 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 21:02:34,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:02:34,279 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:34,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 21:02:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2022-04-06 21:02:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-04-06 21:02:34,300 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 25 [2022-04-06 21:02:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:34,300 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-04-06 21:02:34,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-04-06 21:02:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 21:02:34,301 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:34,302 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:34,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:34,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 21:02:34,525 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:34,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:34,526 INFO L85 PathProgramCache]: Analyzing trace with hash -642600209, now seen corresponding path program 1 times [2022-04-06 21:02:34,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:34,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [473451939] [2022-04-06 21:02:34,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:34,529 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:34,529 INFO L85 PathProgramCache]: Analyzing trace with hash -642600209, now seen corresponding path program 2 times [2022-04-06 21:02:34,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:34,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636886084] [2022-04-06 21:02:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:34,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:34,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 21:02:34,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:34,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636886084] [2022-04-06 21:02:34,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636886084] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:34,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510529916] [2022-04-06 21:02:34,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:34,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:34,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:34,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:34,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 21:02:34,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 21:02:34,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:34,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 21:02:34,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 21:02:34,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:02:34,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510529916] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:34,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:02:34,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-04-06 21:02:34,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:34,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [473451939] [2022-04-06 21:02:34,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [473451939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:34,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:34,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:02:34,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873982729] [2022-04-06 21:02:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:34,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:02:34,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:02:34,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:02:34,839 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:34,881 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-04-06 21:02:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:02:34,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 21:02:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:34,883 INFO L225 Difference]: With dead ends: 119 [2022-04-06 21:02:34,883 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 21:02:34,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:02:34,884 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:34,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:02:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 21:02:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2022-04-06 21:02:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-04-06 21:02:34,904 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 34 [2022-04-06 21:02:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:34,904 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-04-06 21:02:34,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-04-06 21:02:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 21:02:34,907 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:34,907 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:34,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:35,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:35,128 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1480151599, now seen corresponding path program 1 times [2022-04-06 21:02:35,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:35,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [395129396] [2022-04-06 21:02:35,133 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:35,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:35,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1480151599, now seen corresponding path program 2 times [2022-04-06 21:02:35,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:35,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667027546] [2022-04-06 21:02:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:35,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:35,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 21:02:35,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:35,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667027546] [2022-04-06 21:02:35,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667027546] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:35,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475157353] [2022-04-06 21:02:35,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:35,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:35,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:35,368 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:35,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 21:02:35,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:35,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:35,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:02:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 3 proven. 91 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 21:02:35,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 21:02:36,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475157353] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:36,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:36,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-04-06 21:02:36,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:36,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [395129396] [2022-04-06 21:02:36,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [395129396] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:36,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:36,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:02:36,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601526899] [2022-04-06 21:02:36,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:36,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:02:36,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:02:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:02:36,168 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:36,455 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2022-04-06 21:02:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:02:36,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 21:02:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:36,457 INFO L225 Difference]: With dead ends: 154 [2022-04-06 21:02:36,457 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 21:02:36,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:02:36,459 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 80 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:36,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 38 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 21:02:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-04-06 21:02:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2022-04-06 21:02:36,492 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 58 [2022-04-06 21:02:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:36,492 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2022-04-06 21:02:36,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:36,492 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2022-04-06 21:02:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 21:02:36,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:36,497 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:36,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:36,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:36,720 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:36,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1636217860, now seen corresponding path program 3 times [2022-04-06 21:02:36,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:36,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1695485214] [2022-04-06 21:02:36,727 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:36,727 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1636217860, now seen corresponding path program 4 times [2022-04-06 21:02:36,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:36,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108362955] [2022-04-06 21:02:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:36,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:36,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 16 proven. 83 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-04-06 21:02:36,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:36,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108362955] [2022-04-06 21:02:36,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108362955] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:36,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637189707] [2022-04-06 21:02:36,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:36,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:36,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:36,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:36,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 21:02:37,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:37,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:02:37,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 152 proven. 54 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-04-06 21:02:37,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 111 proven. 95 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-04-06 21:02:37,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637189707] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:37,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:37,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-04-06 21:02:37,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:37,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1695485214] [2022-04-06 21:02:37,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1695485214] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:37,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:37,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:02:37,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103386369] [2022-04-06 21:02:37,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:37,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:02:37,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:37,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:02:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:02:37,516 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:37,871 INFO L93 Difference]: Finished difference Result 184 states and 227 transitions. [2022-04-06 21:02:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:02:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 21:02:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:37,873 INFO L225 Difference]: With dead ends: 184 [2022-04-06 21:02:37,874 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 21:02:37,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:02:37,877 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 88 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:37,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 33 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 21:02:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-04-06 21:02:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2022-04-06 21:02:37,910 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 73 [2022-04-06 21:02:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:37,910 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2022-04-06 21:02:37,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:37,910 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2022-04-06 21:02:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 21:02:37,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:37,912 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:37,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:38,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:38,140 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash 439929103, now seen corresponding path program 5 times [2022-04-06 21:02:38,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:38,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1434348618] [2022-04-06 21:02:38,147 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:38,147 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:38,147 INFO L85 PathProgramCache]: Analyzing trace with hash 439929103, now seen corresponding path program 6 times [2022-04-06 21:02:38,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031987760] [2022-04-06 21:02:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:38,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:38,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 16 proven. 163 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-04-06 21:02:38,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:38,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031987760] [2022-04-06 21:02:38,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031987760] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:38,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747779939] [2022-04-06 21:02:38,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:38,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:38,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:38,435 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:38,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 21:02:38,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:02:38,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:02:38,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 169 proven. 121 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 21:02:38,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 21:02:39,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747779939] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:39,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:39,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2022-04-06 21:02:39,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1434348618] [2022-04-06 21:02:39,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1434348618] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:39,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:39,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:02:39,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483939046] [2022-04-06 21:02:39,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:39,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:02:39,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:02:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:02:39,149 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:39,494 INFO L93 Difference]: Finished difference Result 214 states and 257 transitions. [2022-04-06 21:02:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:02:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-04-06 21:02:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:39,496 INFO L225 Difference]: With dead ends: 214 [2022-04-06 21:02:39,496 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 21:02:39,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:02:39,497 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:39,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 33 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:02:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 21:02:39,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2022-04-06 21:02:39,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.15) internal successors, (115), 100 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2022-04-06 21:02:39,522 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 88 [2022-04-06 21:02:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:39,522 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2022-04-06 21:02:39,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2022-04-06 21:02:39,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 21:02:39,523 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:39,523 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:39,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:39,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:39,740 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:39,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:39,740 INFO L85 PathProgramCache]: Analyzing trace with hash -577008868, now seen corresponding path program 7 times [2022-04-06 21:02:39,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:39,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [332142564] [2022-04-06 21:02:39,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:39,747 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:39,747 INFO L85 PathProgramCache]: Analyzing trace with hash -577008868, now seen corresponding path program 8 times [2022-04-06 21:02:39,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:39,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528910178] [2022-04-06 21:02:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:39,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:39,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 16 proven. 270 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2022-04-06 21:02:39,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528910178] [2022-04-06 21:02:39,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528910178] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518180971] [2022-04-06 21:02:39,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:39,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:39,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:39,992 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:39,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 21:02:40,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:40,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:40,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:02:40,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 256 proven. 14 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2022-04-06 21:02:40,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 256 proven. 14 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2022-04-06 21:02:40,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518180971] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:40,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:40,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 21 [2022-04-06 21:02:40,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:40,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [332142564] [2022-04-06 21:02:40,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [332142564] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:40,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:40,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:02:40,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637304695] [2022-04-06 21:02:40,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:40,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:02:40,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:40,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:02:40,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:02:40,573 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:40,994 INFO L93 Difference]: Finished difference Result 244 states and 287 transitions. [2022-04-06 21:02:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:02:40,995 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 21:02:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:40,996 INFO L225 Difference]: With dead ends: 244 [2022-04-06 21:02:40,996 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 21:02:40,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:02:40,997 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 104 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:40,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 28 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:02:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 21:02:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2022-04-06 21:02:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.1304347826086956) internal successors, (130), 115 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2022-04-06 21:02:41,029 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 103 [2022-04-06 21:02:41,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:41,030 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2022-04-06 21:02:41,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:41,030 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2022-04-06 21:02:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 21:02:41,030 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:41,031 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:41,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:41,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:41,252 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:41,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1926191087, now seen corresponding path program 9 times [2022-04-06 21:02:41,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:41,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [715834692] [2022-04-06 21:02:41,259 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:41,259 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:41,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1926191087, now seen corresponding path program 10 times [2022-04-06 21:02:41,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:41,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628442408] [2022-04-06 21:02:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:41,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:41,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 16 proven. 404 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-04-06 21:02:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628442408] [2022-04-06 21:02:41,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628442408] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552478970] [2022-04-06 21:02:41,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:41,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:41,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:41,550 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:41,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 21:02:41,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:41,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:41,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:02:41,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 724 proven. 62 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-04-06 21:02:41,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 566 proven. 220 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-04-06 21:02:42,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552478970] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:42,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:42,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 21 [2022-04-06 21:02:42,225 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:42,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [715834692] [2022-04-06 21:02:42,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [715834692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:42,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:42,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:02:42,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442818721] [2022-04-06 21:02:42,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:42,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:02:42,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:42,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:02:42,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:02:42,227 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:42,718 INFO L93 Difference]: Finished difference Result 274 states and 317 transitions. [2022-04-06 21:02:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:02:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-04-06 21:02:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:42,723 INFO L225 Difference]: With dead ends: 274 [2022-04-06 21:02:42,723 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 21:02:42,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:02:42,724 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:42,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 43 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:02:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 21:02:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 134. [2022-04-06 21:02:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.1153846153846154) internal successors, (145), 130 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2022-04-06 21:02:42,768 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 118 [2022-04-06 21:02:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:42,768 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2022-04-06 21:02:42,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2022-04-06 21:02:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 21:02:42,769 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:42,769 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:42,791 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 21:02:42,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 21:02:42,985 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:42,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1980805692, now seen corresponding path program 11 times [2022-04-06 21:02:42,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:42,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [271605013] [2022-04-06 21:02:42,991 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-04-06 21:02:42,996 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:42,996 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:42,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1980805692, now seen corresponding path program 12 times [2022-04-06 21:02:42,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:42,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119500343] [2022-04-06 21:02:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:42,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:43,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 16 proven. 565 refuted. 0 times theorem prover too weak. 974 trivial. 0 not checked. [2022-04-06 21:02:43,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119500343] [2022-04-06 21:02:43,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119500343] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838755642] [2022-04-06 21:02:43,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:43,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:43,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:43,335 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:43,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 21:02:43,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:02:43,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:43,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:02:43,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 520 proven. 385 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 21:02:43,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 0 proven. 905 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 21:02:44,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838755642] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:44,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:44,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-04-06 21:02:44,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:44,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [271605013] [2022-04-06 21:02:44,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [271605013] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:44,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:44,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:02:44,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480708217] [2022-04-06 21:02:44,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:44,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:02:44,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:44,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:02:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:02:44,222 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:44,722 INFO L93 Difference]: Finished difference Result 304 states and 347 transitions. [2022-04-06 21:02:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:02:44,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-04-06 21:02:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:44,723 INFO L225 Difference]: With dead ends: 304 [2022-04-06 21:02:44,724 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 21:02:44,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:02:44,725 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:44,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 38 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:02:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 21:02:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2022-04-06 21:02:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.103448275862069) internal successors, (160), 145 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 163 transitions. [2022-04-06 21:02:44,762 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 163 transitions. Word has length 133 [2022-04-06 21:02:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:44,763 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 163 transitions. [2022-04-06 21:02:44,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 163 transitions. [2022-04-06 21:02:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-04-06 21:02:44,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:44,764 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 35, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:44,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:44,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:44,986 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash 532348623, now seen corresponding path program 13 times [2022-04-06 21:02:44,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:44,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [941245756] [2022-04-06 21:02:44,992 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-04-06 21:02:45,024 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:45,024 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash 532348623, now seen corresponding path program 14 times [2022-04-06 21:02:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:45,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877937728] [2022-04-06 21:02:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:45,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2065 backedges. 16 proven. 753 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-04-06 21:02:45,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:45,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877937728] [2022-04-06 21:02:45,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877937728] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071404629] [2022-04-06 21:02:45,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:45,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:45,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:45,367 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:45,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 21:02:45,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:45,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:45,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:02:45,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2065 backedges. 679 proven. 26 refuted. 0 times theorem prover too weak. 1360 trivial. 0 not checked. [2022-04-06 21:02:45,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2065 backedges. 679 proven. 26 refuted. 0 times theorem prover too weak. 1360 trivial. 0 not checked. [2022-04-06 21:02:46,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071404629] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:46,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:46,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 24 [2022-04-06 21:02:46,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [941245756] [2022-04-06 21:02:46,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [941245756] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:46,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:46,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:02:46,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083504853] [2022-04-06 21:02:46,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:46,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:02:46,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:02:46,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:02:46,027 INFO L87 Difference]: Start difference. First operand 149 states and 163 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:46,652 INFO L93 Difference]: Finished difference Result 334 states and 377 transitions. [2022-04-06 21:02:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:02:46,652 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-04-06 21:02:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:46,653 INFO L225 Difference]: With dead ends: 334 [2022-04-06 21:02:46,653 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 21:02:46,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:02:46,654 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 128 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:46,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 38 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:02:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 21:02:46,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 164. [2022-04-06 21:02:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.09375) internal successors, (175), 160 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2022-04-06 21:02:46,695 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 148 [2022-04-06 21:02:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:46,695 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2022-04-06 21:02:46,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2022-04-06 21:02:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 21:02:46,696 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:46,697 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 40, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:46,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:46,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 21:02:46,899 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:46,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1143291556, now seen corresponding path program 15 times [2022-04-06 21:02:46,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:46,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1656259153] [2022-04-06 21:02:46,906 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2022-04-06 21:02:46,962 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:46,962 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1143291556, now seen corresponding path program 16 times [2022-04-06 21:02:46,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:46,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651408169] [2022-04-06 21:02:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:46,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:47,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2650 backedges. 16 proven. 968 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2022-04-06 21:02:47,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:47,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651408169] [2022-04-06 21:02:47,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651408169] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:47,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785553955] [2022-04-06 21:02:47,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:47,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:47,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:47,364 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:47,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 21:02:47,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:47,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:02:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2650 backedges. 872 proven. 678 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2022-04-06 21:02:47,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2650 backedges. 770 proven. 780 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2022-04-06 21:02:48,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785553955] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:48,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:48,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 24 [2022-04-06 21:02:48,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:48,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1656259153] [2022-04-06 21:02:48,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1656259153] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:48,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:48,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:02:48,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288356405] [2022-04-06 21:02:48,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:48,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:02:48,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:02:48,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:02:48,094 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:48,757 INFO L93 Difference]: Finished difference Result 364 states and 407 transitions. [2022-04-06 21:02:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:02:48,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-04-06 21:02:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:48,759 INFO L225 Difference]: With dead ends: 364 [2022-04-06 21:02:48,759 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 21:02:48,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:02:48,760 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 136 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:48,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 53 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:02:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 21:02:48,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-04-06 21:02:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.0857142857142856) internal successors, (190), 175 states have internal predecessors, (190), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 193 transitions. [2022-04-06 21:02:48,817 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 193 transitions. Word has length 163 [2022-04-06 21:02:48,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:48,817 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 193 transitions. [2022-04-06 21:02:48,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:48,817 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 193 transitions. [2022-04-06 21:02:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-04-06 21:02:48,819 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:48,819 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 45, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:48,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-06 21:02:49,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 21:02:49,035 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1338393169, now seen corresponding path program 17 times [2022-04-06 21:02:49,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:49,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105447582] [2022-04-06 21:02:49,041 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2022-04-06 21:02:49,178 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:49,178 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:49,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1338393169, now seen corresponding path program 18 times [2022-04-06 21:02:49,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:49,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557343934] [2022-04-06 21:02:49,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:49,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:49,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3310 backedges. 16 proven. 1210 refuted. 0 times theorem prover too weak. 2084 trivial. 0 not checked. [2022-04-06 21:02:49,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:49,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557343934] [2022-04-06 21:02:49,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557343934] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:49,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586132940] [2022-04-06 21:02:49,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:49,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:49,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:49,618 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:49,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 21:02:49,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:02:49,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 21:02:49,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3310 backedges. 0 proven. 1088 refuted. 0 times theorem prover too weak. 2222 trivial. 0 not checked. [2022-04-06 21:02:50,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3310 backedges. 0 proven. 1088 refuted. 0 times theorem prover too weak. 2222 trivial. 0 not checked. [2022-04-06 21:02:50,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586132940] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:50,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:50,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 4, 4] total 20 [2022-04-06 21:02:50,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:50,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105447582] [2022-04-06 21:02:50,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105447582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:50,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:50,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:02:50,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712097305] [2022-04-06 21:02:50,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:50,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:02:50,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:02:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:02:50,651 INFO L87 Difference]: Start difference. First operand 179 states and 193 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:51,377 INFO L93 Difference]: Finished difference Result 394 states and 437 transitions. [2022-04-06 21:02:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:02:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-04-06 21:02:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:51,378 INFO L225 Difference]: With dead ends: 394 [2022-04-06 21:02:51,378 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 21:02:51,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2022-04-06 21:02:51,379 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:51,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 33 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:02:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 21:02:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2022-04-06 21:02:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.0789473684210527) internal successors, (205), 190 states have internal predecessors, (205), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 208 transitions. [2022-04-06 21:02:51,458 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 208 transitions. Word has length 178 [2022-04-06 21:02:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:51,459 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 208 transitions. [2022-04-06 21:02:51,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 208 transitions. [2022-04-06 21:02:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 21:02:51,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:51,461 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 50, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:51,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 21:02:51,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 21:02:51,675 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:51,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2122598276, now seen corresponding path program 19 times [2022-04-06 21:02:51,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:51,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960426014] [2022-04-06 21:02:51,681 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-04-06 21:02:51,776 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:51,776 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2122598276, now seen corresponding path program 20 times [2022-04-06 21:02:51,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:51,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281683028] [2022-04-06 21:02:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:51,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:52,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4045 backedges. 16 proven. 1479 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-04-06 21:02:52,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:52,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281683028] [2022-04-06 21:02:52,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281683028] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:52,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848737221] [2022-04-06 21:02:52,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:52,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:52,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:52,267 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:52,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 21:02:52,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:52,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:02:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4045 backedges. 1318 proven. 38 refuted. 0 times theorem prover too weak. 2689 trivial. 0 not checked. [2022-04-06 21:02:52,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4045 backedges. 1318 proven. 38 refuted. 0 times theorem prover too weak. 2689 trivial. 0 not checked. [2022-04-06 21:02:53,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848737221] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:53,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:53,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 27 [2022-04-06 21:02:53,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960426014] [2022-04-06 21:02:53,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960426014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:53,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:53,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:02:53,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587008674] [2022-04-06 21:02:53,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:53,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:02:53,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:53,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:02:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:02:53,066 INFO L87 Difference]: Start difference. First operand 194 states and 208 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:53,915 INFO L93 Difference]: Finished difference Result 424 states and 467 transitions. [2022-04-06 21:02:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:02:53,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-04-06 21:02:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:53,917 INFO L225 Difference]: With dead ends: 424 [2022-04-06 21:02:53,917 INFO L226 Difference]: Without dead ends: 218 [2022-04-06 21:02:53,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 21:02:53,918 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:53,918 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 33 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:02:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-06 21:02:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 209. [2022-04-06 21:02:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 205 states have (on average 1.0731707317073171) internal successors, (220), 205 states have internal predecessors, (220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 223 transitions. [2022-04-06 21:02:53,974 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 223 transitions. Word has length 193 [2022-04-06 21:02:53,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:53,974 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 223 transitions. [2022-04-06 21:02:53,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 223 transitions. [2022-04-06 21:02:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-04-06 21:02:53,976 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:53,976 INFO L499 BasicCegarLoop]: trace histogram [56, 55, 55, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:53,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 21:02:54,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 21:02:54,196 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:54,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:54,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1695126671, now seen corresponding path program 21 times [2022-04-06 21:02:54,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:54,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1105781545] [2022-04-06 21:02:54,203 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2022-04-06 21:02:54,218 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:54,218 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:54,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1695126671, now seen corresponding path program 22 times [2022-04-06 21:02:54,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:54,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305844556] [2022-04-06 21:02:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:54,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:54,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4855 backedges. 16 proven. 1775 refuted. 0 times theorem prover too weak. 3064 trivial. 0 not checked. [2022-04-06 21:02:54,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:54,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305844556] [2022-04-06 21:02:54,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305844556] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:54,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121624809] [2022-04-06 21:02:54,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:02:54,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:54,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:54,724 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:54,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 21:02:54,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:02:54,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:54,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:02:54,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4855 backedges. 3193 proven. 50 refuted. 0 times theorem prover too weak. 1612 trivial. 0 not checked. [2022-04-06 21:02:55,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4855 backedges. 3193 proven. 50 refuted. 0 times theorem prover too weak. 1612 trivial. 0 not checked. [2022-04-06 21:02:55,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121624809] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:55,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:55,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 27 [2022-04-06 21:02:55,518 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:55,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1105781545] [2022-04-06 21:02:55,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1105781545] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:55,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:55,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:02:55,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989756714] [2022-04-06 21:02:55,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:55,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:02:55,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:55,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:02:55,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:02:55,519 INFO L87 Difference]: Start difference. First operand 209 states and 223 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:56,422 INFO L93 Difference]: Finished difference Result 454 states and 497 transitions. [2022-04-06 21:02:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:02:56,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-04-06 21:02:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:56,424 INFO L225 Difference]: With dead ends: 454 [2022-04-06 21:02:56,424 INFO L226 Difference]: Without dead ends: 233 [2022-04-06 21:02:56,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:02:56,426 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:56,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 73 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:02:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-04-06 21:02:56,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 224. [2022-04-06 21:02:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 220 states have (on average 1.0681818181818181) internal successors, (235), 220 states have internal predecessors, (235), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 238 transitions. [2022-04-06 21:02:56,505 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 238 transitions. Word has length 208 [2022-04-06 21:02:56,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:56,505 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 238 transitions. [2022-04-06 21:02:56,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:02:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 238 transitions. [2022-04-06 21:02:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-06 21:02:56,507 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:56,508 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 60, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:56,533 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 21:02:56,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:56,729 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash 938842012, now seen corresponding path program 23 times [2022-04-06 21:02:56,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:56,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2032921664] [2022-04-06 21:02:56,740 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-04-06 21:02:56,792 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6270 conjuctions. This might take some time... [2022-04-06 21:02:58,130 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 2050 conjuctions. [2022-04-06 21:02:58,167 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:58,167 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash 938842012, now seen corresponding path program 24 times [2022-04-06 21:02:58,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:58,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6072850] [2022-04-06 21:02:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:58,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:58,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5740 backedges. 16 proven. 2098 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2022-04-06 21:02:58,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:58,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6072850] [2022-04-06 21:02:58,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6072850] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:58,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597421654] [2022-04-06 21:02:58,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:58,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:58,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:58,706 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:02:58,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 21:02:58,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:02:58,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:58,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:02:58,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5740 backedges. 1870 proven. 1399 refuted. 0 times theorem prover too weak. 2471 trivial. 0 not checked. [2022-04-06 21:02:59,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5740 backedges. 0 proven. 3269 refuted. 0 times theorem prover too weak. 2471 trivial. 0 not checked. [2022-04-06 21:02:59,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597421654] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:59,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:59,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 25 [2022-04-06 21:02:59,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:59,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2032921664] [2022-04-06 21:02:59,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2032921664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:59,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:59,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:02:59,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053981733] [2022-04-06 21:02:59,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:59,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:02:59,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:02:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:02:59,958 INFO L87 Difference]: Start difference. First operand 224 states and 238 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:00,982 INFO L93 Difference]: Finished difference Result 484 states and 527 transitions. [2022-04-06 21:03:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:03:00,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-04-06 21:03:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:00,983 INFO L225 Difference]: With dead ends: 484 [2022-04-06 21:03:00,984 INFO L226 Difference]: Without dead ends: 248 [2022-04-06 21:03:00,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=1317, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 21:03:00,985 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 168 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:00,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 28 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:03:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-04-06 21:03:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 239. [2022-04-06 21:03:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 235 states have (on average 1.0638297872340425) internal successors, (250), 235 states have internal predecessors, (250), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 253 transitions. [2022-04-06 21:03:01,055 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 253 transitions. Word has length 223 [2022-04-06 21:03:01,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:01,056 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 253 transitions. [2022-04-06 21:03:01,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 253 transitions. [2022-04-06 21:03:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-04-06 21:03:01,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:01,057 INFO L499 BasicCegarLoop]: trace histogram [66, 65, 65, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:01,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:01,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:03:01,266 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:01,267 INFO L85 PathProgramCache]: Analyzing trace with hash 275284847, now seen corresponding path program 25 times [2022-04-06 21:03:01,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:01,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1161257416] [2022-04-06 21:03:01,275 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2022-04-06 21:03:01,368 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 12414 conjuctions. This might take some time... [2022-04-06 21:03:05,437 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 4098 conjuctions. [2022-04-06 21:03:05,535 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:05,535 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:05,535 INFO L85 PathProgramCache]: Analyzing trace with hash 275284847, now seen corresponding path program 26 times [2022-04-06 21:03:05,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:05,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759925073] [2022-04-06 21:03:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:05,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:06,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 16 proven. 2448 refuted. 0 times theorem prover too weak. 4236 trivial. 0 not checked. [2022-04-06 21:03:06,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759925073] [2022-04-06 21:03:06,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759925073] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236676775] [2022-04-06 21:03:06,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:06,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:06,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:06,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:06,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 21:03:06,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:06,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:03:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 2173 proven. 50 refuted. 0 times theorem prover too weak. 4477 trivial. 0 not checked. [2022-04-06 21:03:06,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 2173 proven. 50 refuted. 0 times theorem prover too weak. 4477 trivial. 0 not checked. [2022-04-06 21:03:07,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236676775] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:07,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:07,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7, 7] total 30 [2022-04-06 21:03:07,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1161257416] [2022-04-06 21:03:07,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1161257416] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:07,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:07,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:03:07,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753116583] [2022-04-06 21:03:07,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:07,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:03:07,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:07,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:03:07,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:03:07,088 INFO L87 Difference]: Start difference. First operand 239 states and 253 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:08,265 INFO L93 Difference]: Finished difference Result 514 states and 557 transitions. [2022-04-06 21:03:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:03:08,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2022-04-06 21:03:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:08,267 INFO L225 Difference]: With dead ends: 514 [2022-04-06 21:03:08,267 INFO L226 Difference]: Without dead ends: 263 [2022-04-06 21:03:08,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=1836, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 21:03:08,268 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 176 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:08,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 88 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:03:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-06 21:03:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 254. [2022-04-06 21:03:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.06) internal successors, (265), 250 states have internal predecessors, (265), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 268 transitions. [2022-04-06 21:03:08,342 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 268 transitions. Word has length 238 [2022-04-06 21:03:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:08,342 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 268 transitions. [2022-04-06 21:03:08,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 268 transitions. [2022-04-06 21:03:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-04-06 21:03:08,344 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:08,344 INFO L499 BasicCegarLoop]: trace histogram [71, 70, 70, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:08,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:08,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 21:03:08,547 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:08,548 INFO L85 PathProgramCache]: Analyzing trace with hash 248143548, now seen corresponding path program 27 times [2022-04-06 21:03:08,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:08,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [484486249] [2022-04-06 21:03:08,556 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2022-04-06 21:03:08,725 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 28670 conjuctions. This might take some time... [2022-04-06 21:03:31,182 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8194 conjuctions. [2022-04-06 21:03:31,381 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:31,381 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash 248143548, now seen corresponding path program 28 times [2022-04-06 21:03:31,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:31,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482801] [2022-04-06 21:03:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:31,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:31,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7735 backedges. 16 proven. 2825 refuted. 0 times theorem prover too weak. 4894 trivial. 0 not checked. [2022-04-06 21:03:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:31,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482801] [2022-04-06 21:03:31,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482801] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:31,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117630320] [2022-04-06 21:03:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:31,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:31,979 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:31,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 21:03:32,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:32,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:32,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:03:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7735 backedges. 4963 proven. 170 refuted. 0 times theorem prover too weak. 2602 trivial. 0 not checked. [2022-04-06 21:03:32,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7735 backedges. 3779 proven. 1354 refuted. 0 times theorem prover too weak. 2602 trivial. 0 not checked. [2022-04-06 21:03:33,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117630320] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:33,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:33,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 30 [2022-04-06 21:03:33,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:33,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [484486249] [2022-04-06 21:03:33,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [484486249] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:33,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:33,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:03:33,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335828346] [2022-04-06 21:03:33,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:33,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:03:33,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:03:33,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:03:33,086 INFO L87 Difference]: Start difference. First operand 254 states and 268 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:34,299 INFO L93 Difference]: Finished difference Result 544 states and 587 transitions. [2022-04-06 21:03:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:03:34,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-04-06 21:03:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:34,300 INFO L225 Difference]: With dead ends: 544 [2022-04-06 21:03:34,300 INFO L226 Difference]: Without dead ends: 278 [2022-04-06 21:03:34,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:03:34,301 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 184 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:34,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 38 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:03:34,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-04-06 21:03:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 269. [2022-04-06 21:03:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 265 states have (on average 1.0566037735849056) internal successors, (280), 265 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 283 transitions. [2022-04-06 21:03:34,388 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 283 transitions. Word has length 253 [2022-04-06 21:03:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:34,389 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 283 transitions. [2022-04-06 21:03:34,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 283 transitions. [2022-04-06 21:03:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-04-06 21:03:34,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:34,390 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 75, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:34,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:34,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:34,590 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -166426033, now seen corresponding path program 29 times [2022-04-06 21:03:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:34,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [403111274] [2022-04-06 21:03:34,599 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2022-04-06 21:03:34,979 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 49158 conjuctions. This might take some time... [2022-04-06 21:04:38,991 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 16386 conjuctions. [2022-04-06 21:04:39,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:39,303 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash -166426033, now seen corresponding path program 30 times [2022-04-06 21:04:39,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:39,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062663379] [2022-04-06 21:04:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:39,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:39,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 16 proven. 3229 refuted. 0 times theorem prover too weak. 5600 trivial. 0 not checked. [2022-04-06 21:04:39,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062663379] [2022-04-06 21:04:39,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062663379] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232104989] [2022-04-06 21:04:39,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:39,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:39,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:39,934 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:39,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 21:04:39,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:04:39,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:39,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 21:04:39,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 4296 proven. 1433 refuted. 0 times theorem prover too weak. 3116 trivial. 0 not checked. [2022-04-06 21:04:40,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 0 proven. 5729 refuted. 0 times theorem prover too weak. 3116 trivial. 0 not checked. [2022-04-06 21:04:41,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232104989] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:41,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:41,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 5, 5] total 28 [2022-04-06 21:04:41,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:41,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [403111274] [2022-04-06 21:04:41,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [403111274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:41,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:41,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:04:41,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928688525] [2022-04-06 21:04:41,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:41,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:04:41,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:41,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:04:41,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:04:41,244 INFO L87 Difference]: Start difference. First operand 269 states and 283 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:42,523 INFO L93 Difference]: Finished difference Result 574 states and 617 transitions. [2022-04-06 21:04:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:04:42,524 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2022-04-06 21:04:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:42,525 INFO L225 Difference]: With dead ends: 574 [2022-04-06 21:04:42,525 INFO L226 Difference]: Without dead ends: 293 [2022-04-06 21:04:42,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 21:04:42,527 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 192 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:42,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 48 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:04:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-04-06 21:04:42,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 284. [2022-04-06 21:04:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 280 states have (on average 1.0535714285714286) internal successors, (295), 280 states have internal predecessors, (295), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 298 transitions. [2022-04-06 21:04:42,624 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 298 transitions. Word has length 268 [2022-04-06 21:04:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:42,624 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 298 transitions. [2022-04-06 21:04:42,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 298 transitions. [2022-04-06 21:04:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-04-06 21:04:42,625 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:42,625 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 80, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:42,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:42,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:42,830 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash 335285724, now seen corresponding path program 31 times [2022-04-06 21:04:42,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:42,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1269164741] [2022-04-06 21:04:42,838 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:42,838 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:42,838 INFO L85 PathProgramCache]: Analyzing trace with hash 335285724, now seen corresponding path program 32 times [2022-04-06 21:04:42,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:42,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342198714] [2022-04-06 21:04:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:42,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:43,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10030 backedges. 16 proven. 3660 refuted. 0 times theorem prover too weak. 6354 trivial. 0 not checked. [2022-04-06 21:04:43,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:43,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342198714] [2022-04-06 21:04:43,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342198714] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:43,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779347791] [2022-04-06 21:04:43,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:43,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:43,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:43,514 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:43,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 21:04:43,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:43,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:04:43,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10030 backedges. 3244 proven. 62 refuted. 0 times theorem prover too weak. 6724 trivial. 0 not checked. [2022-04-06 21:04:44,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10030 backedges. 3244 proven. 62 refuted. 0 times theorem prover too weak. 6724 trivial. 0 not checked. [2022-04-06 21:04:44,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779347791] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:44,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:44,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 7, 7] total 33 [2022-04-06 21:04:44,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:44,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1269164741] [2022-04-06 21:04:44,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1269164741] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:44,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:44,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:04:44,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179415523] [2022-04-06 21:04:44,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:44,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:04:44,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:44,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:04:44,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:04:44,565 INFO L87 Difference]: Start difference. First operand 284 states and 298 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:45,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:45,991 INFO L93 Difference]: Finished difference Result 604 states and 647 transitions. [2022-04-06 21:04:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:04:45,992 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-04-06 21:04:45,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:45,993 INFO L225 Difference]: With dead ends: 604 [2022-04-06 21:04:45,993 INFO L226 Difference]: Without dead ends: 308 [2022-04-06 21:04:45,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=273, Invalid=2379, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 21:04:45,995 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 200 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:45,995 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 33 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:04:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-04-06 21:04:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 299. [2022-04-06 21:04:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 295 states have (on average 1.0508474576271187) internal successors, (310), 295 states have internal predecessors, (310), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 313 transitions. [2022-04-06 21:04:46,132 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 313 transitions. Word has length 283 [2022-04-06 21:04:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:46,133 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 313 transitions. [2022-04-06 21:04:46,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 313 transitions. [2022-04-06 21:04:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-04-06 21:04:46,134 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:46,134 INFO L499 BasicCegarLoop]: trace histogram [86, 85, 85, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:46,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:46,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:46,356 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:46,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:46,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1421104849, now seen corresponding path program 33 times [2022-04-06 21:04:46,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:46,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1580337682] [2022-04-06 21:04:46,365 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2022-04-06 21:04:46,383 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:46,383 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:46,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1421104849, now seen corresponding path program 34 times [2022-04-06 21:04:46,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:46,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265543604] [2022-04-06 21:04:46,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:46,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:47,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11290 backedges. 16 proven. 4118 refuted. 0 times theorem prover too weak. 7156 trivial. 0 not checked. [2022-04-06 21:04:47,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:47,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265543604] [2022-04-06 21:04:47,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265543604] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:47,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501630511] [2022-04-06 21:04:47,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:47,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:47,086 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:47,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 21:04:47,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:47,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:47,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:04:47,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11290 backedges. 3649 proven. 66 refuted. 0 times theorem prover too weak. 7575 trivial. 0 not checked. [2022-04-06 21:04:47,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11290 backedges. 3649 proven. 66 refuted. 0 times theorem prover too weak. 7575 trivial. 0 not checked. [2022-04-06 21:04:48,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501630511] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:48,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:48,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 34 [2022-04-06 21:04:48,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:48,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1580337682] [2022-04-06 21:04:48,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1580337682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:48,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:48,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 21:04:48,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390559418] [2022-04-06 21:04:48,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:48,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 21:04:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:48,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 21:04:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:04:48,218 INFO L87 Difference]: Start difference. First operand 299 states and 313 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:49,767 INFO L93 Difference]: Finished difference Result 634 states and 677 transitions. [2022-04-06 21:04:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:04:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2022-04-06 21:04:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:49,770 INFO L225 Difference]: With dead ends: 634 [2022-04-06 21:04:49,770 INFO L226 Difference]: Without dead ends: 323 [2022-04-06 21:04:49,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=286, Invalid=2576, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 21:04:49,772 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 208 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:49,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 48 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:04:49,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-04-06 21:04:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 314. [2022-04-06 21:04:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 310 states have (on average 1.0483870967741935) internal successors, (325), 310 states have internal predecessors, (325), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 328 transitions. [2022-04-06 21:04:49,885 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 328 transitions. Word has length 298 [2022-04-06 21:04:49,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:49,885 INFO L478 AbstractCegarLoop]: Abstraction has 314 states and 328 transitions. [2022-04-06 21:04:49,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:49,885 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 328 transitions. [2022-04-06 21:04:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-04-06 21:04:49,886 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:49,886 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 90, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:49,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-06 21:04:50,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 21:04:50,087 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:50,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:50,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1410114812, now seen corresponding path program 35 times [2022-04-06 21:04:50,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:50,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1250033025] [2022-04-06 21:04:50,095 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:50,095 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1410114812, now seen corresponding path program 36 times [2022-04-06 21:04:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:50,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805721215] [2022-04-06 21:04:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:50,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:50,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12625 backedges. 16 proven. 4603 refuted. 0 times theorem prover too weak. 8006 trivial. 0 not checked. [2022-04-06 21:04:50,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:50,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805721215] [2022-04-06 21:04:50,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805721215] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:50,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7655837] [2022-04-06 21:04:50,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:50,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:50,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:50,816 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:50,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 21:04:50,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:04:50,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:50,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 21:04:50,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12625 backedges. 6120 proven. 2042 refuted. 0 times theorem prover too weak. 4463 trivial. 0 not checked. [2022-04-06 21:04:51,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12625 backedges. 0 proven. 8162 refuted. 0 times theorem prover too weak. 4463 trivial. 0 not checked. [2022-04-06 21:04:52,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7655837] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:52,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:52,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2022-04-06 21:04:52,305 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:52,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1250033025] [2022-04-06 21:04:52,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1250033025] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:52,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:52,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:04:52,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742186096] [2022-04-06 21:04:52,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:52,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:04:52,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:52,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:04:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:04:52,306 INFO L87 Difference]: Start difference. First operand 314 states and 328 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:53,869 INFO L93 Difference]: Finished difference Result 664 states and 707 transitions. [2022-04-06 21:04:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:04:53,869 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-04-06 21:04:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:53,870 INFO L225 Difference]: With dead ends: 664 [2022-04-06 21:04:53,871 INFO L226 Difference]: Without dead ends: 338 [2022-04-06 21:04:53,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 623 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=2319, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 21:04:53,872 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 216 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:53,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 68 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:04:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-04-06 21:04:53,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 329. [2022-04-06 21:04:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.0461538461538462) internal successors, (340), 325 states have internal predecessors, (340), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 343 transitions. [2022-04-06 21:04:54,001 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 343 transitions. Word has length 313 [2022-04-06 21:04:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:54,001 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 343 transitions. [2022-04-06 21:04:54,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 343 transitions. [2022-04-06 21:04:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-04-06 21:04:54,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:54,002 INFO L499 BasicCegarLoop]: trace histogram [96, 95, 95, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:54,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:54,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 21:04:54,203 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:54,204 INFO L85 PathProgramCache]: Analyzing trace with hash -154410993, now seen corresponding path program 37 times [2022-04-06 21:04:54,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [590827299] [2022-04-06 21:04:54,213 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:54,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash -154410993, now seen corresponding path program 38 times [2022-04-06 21:04:54,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:54,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422796259] [2022-04-06 21:04:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:54,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:54,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14035 backedges. 16 proven. 5115 refuted. 0 times theorem prover too weak. 8904 trivial. 0 not checked. [2022-04-06 21:04:54,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:54,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422796259] [2022-04-06 21:04:54,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422796259] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:54,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875812440] [2022-04-06 21:04:54,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:54,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:54,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:54,968 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:54,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 21:04:55,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:55,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:55,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:04:55,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14035 backedges. 4531 proven. 74 refuted. 0 times theorem prover too weak. 9430 trivial. 0 not checked. [2022-04-06 21:04:55,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14035 backedges. 4531 proven. 74 refuted. 0 times theorem prover too weak. 9430 trivial. 0 not checked. [2022-04-06 21:04:56,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875812440] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:56,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:56,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 7, 7] total 36 [2022-04-06 21:04:56,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:56,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [590827299] [2022-04-06 21:04:56,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [590827299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:56,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:56,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 21:04:56,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569073779] [2022-04-06 21:04:56,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:56,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 21:04:56,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 21:04:56,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 21:04:56,262 INFO L87 Difference]: Start difference. First operand 329 states and 343 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:58,024 INFO L93 Difference]: Finished difference Result 694 states and 737 transitions. [2022-04-06 21:04:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 21:04:58,024 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 328 [2022-04-06 21:04:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:58,025 INFO L225 Difference]: With dead ends: 694 [2022-04-06 21:04:58,026 INFO L226 Difference]: Without dead ends: 353 [2022-04-06 21:04:58,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=312, Invalid=2994, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 21:04:58,027 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 224 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:58,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 73 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:04:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-04-06 21:04:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 344. [2022-04-06 21:04:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 340 states have (on average 1.0441176470588236) internal successors, (355), 340 states have internal predecessors, (355), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 358 transitions. [2022-04-06 21:04:58,159 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 358 transitions. Word has length 328 [2022-04-06 21:04:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:58,159 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 358 transitions. [2022-04-06 21:04:58,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 358 transitions. [2022-04-06 21:04:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-04-06 21:04:58,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:58,160 INFO L499 BasicCegarLoop]: trace histogram [101, 100, 100, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:58,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:58,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:58,361 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:58,361 INFO L85 PathProgramCache]: Analyzing trace with hash -100785124, now seen corresponding path program 39 times [2022-04-06 21:04:58,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:58,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [415518381] [2022-04-06 21:04:58,372 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2022-04-06 21:04:58,750 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:58,750 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:58,750 INFO L85 PathProgramCache]: Analyzing trace with hash -100785124, now seen corresponding path program 40 times [2022-04-06 21:04:58,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:58,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722101897] [2022-04-06 21:04:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:58,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:59,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15520 backedges. 16 proven. 5654 refuted. 0 times theorem prover too weak. 9850 trivial. 0 not checked. [2022-04-06 21:04:59,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:59,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722101897] [2022-04-06 21:04:59,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722101897] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:59,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555253765] [2022-04-06 21:04:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:59,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:59,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:59,641 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:59,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 21:04:59,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:59,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:59,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:04:59,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15520 backedges. 5008 proven. 78 refuted. 0 times theorem prover too weak. 10434 trivial. 0 not checked. [2022-04-06 21:05:00,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15520 backedges. 5008 proven. 78 refuted. 0 times theorem prover too weak. 10434 trivial. 0 not checked. [2022-04-06 21:05:00,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555253765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:00,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:00,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 37 [2022-04-06 21:05:00,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:00,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [415518381] [2022-04-06 21:05:00,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [415518381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:00,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:00,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:05:00,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660086635] [2022-04-06 21:05:00,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:00,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:05:00,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:05:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:05:00,927 INFO L87 Difference]: Start difference. First operand 344 states and 358 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:02,974 INFO L93 Difference]: Finished difference Result 724 states and 767 transitions. [2022-04-06 21:05:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 21:05:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 343 [2022-04-06 21:05:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:02,976 INFO L225 Difference]: With dead ends: 724 [2022-04-06 21:05:02,976 INFO L226 Difference]: Without dead ends: 368 [2022-04-06 21:05:02,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=325, Invalid=3215, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 21:05:02,978 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 232 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:02,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 103 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:05:02,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-04-06 21:05:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 359. [2022-04-06 21:05:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 355 states have (on average 1.0422535211267605) internal successors, (370), 355 states have internal predecessors, (370), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 373 transitions. [2022-04-06 21:05:03,180 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 373 transitions. Word has length 343 [2022-04-06 21:05:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:03,180 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 373 transitions. [2022-04-06 21:05:03,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 373 transitions. [2022-04-06 21:05:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-04-06 21:05:03,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:03,182 INFO L499 BasicCegarLoop]: trace histogram [106, 105, 105, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:03,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:03,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:03,395 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1328337169, now seen corresponding path program 41 times [2022-04-06 21:05:03,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:03,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [324730800] [2022-04-06 21:05:03,408 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-04-06 21:05:03,410 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:03,410 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:03,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1328337169, now seen corresponding path program 42 times [2022-04-06 21:05:03,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:03,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816707148] [2022-04-06 21:05:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:03,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:04,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17080 backedges. 16 proven. 6220 refuted. 0 times theorem prover too weak. 10844 trivial. 0 not checked. [2022-04-06 21:05:04,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:04,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816707148] [2022-04-06 21:05:04,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816707148] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:04,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763291794] [2022-04-06 21:05:04,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:05:04,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:04,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:04,317 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:04,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 21:05:04,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:05:04,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:04,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:05:04,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17080 backedges. 8274 proven. 1388 refuted. 0 times theorem prover too weak. 7418 trivial. 0 not checked. [2022-04-06 21:05:05,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17080 backedges. 0 proven. 9662 refuted. 0 times theorem prover too weak. 7418 trivial. 0 not checked. [2022-04-06 21:05:05,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763291794] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:05,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:05,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2022-04-06 21:05:05,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:05,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [324730800] [2022-04-06 21:05:05,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [324730800] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:05,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:05,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 21:05:05,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116790334] [2022-04-06 21:05:05,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:05,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 21:05:05,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:05,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 21:05:05,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:05:05,907 INFO L87 Difference]: Start difference. First operand 359 states and 373 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 27 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:07,870 INFO L93 Difference]: Finished difference Result 754 states and 797 transitions. [2022-04-06 21:05:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 21:05:07,870 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 27 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 358 [2022-04-06 21:05:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:07,871 INFO L225 Difference]: With dead ends: 754 [2022-04-06 21:05:07,871 INFO L226 Difference]: Without dead ends: 383 [2022-04-06 21:05:07,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=2928, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 21:05:07,873 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 240 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:07,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 73 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 21:05:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-04-06 21:05:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2022-04-06 21:05:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 370 states have (on average 1.0405405405405406) internal successors, (385), 370 states have internal predecessors, (385), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 388 transitions. [2022-04-06 21:05:08,033 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 388 transitions. Word has length 358 [2022-04-06 21:05:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:08,033 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 388 transitions. [2022-04-06 21:05:08,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 27 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:05:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 388 transitions. [2022-04-06 21:05:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-04-06 21:05:08,035 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:08,035 INFO L499 BasicCegarLoop]: trace histogram [111, 110, 110, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:08,050 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 21:05:08,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 21:05:08,235 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1867680572, now seen corresponding path program 43 times [2022-04-06 21:05:08,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:08,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [341406019] [2022-04-06 21:05:08,249 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 22