/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-acceleration/functions_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:45:23,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:45:23,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:45:23,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:45:23,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:45:23,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:45:23,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:45:23,665 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 19:45:23,670 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:45:23,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:45:23,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:45:23,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:45:23,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:45:23,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:45:23,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:45:23,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:45:23,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:45:23,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:45:23,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:45:23,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:45:23,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:45:23,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:45:23,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:45:23,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:45:23,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:45:23,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:45:23,673 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:45:23,673 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:45:23,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:45:23,673 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:45:23,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:45:23,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:45:23,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:45:23,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:45:23,897 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:45:23,898 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:45:23,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-04-06 19:45:23,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2988ba90/c3da11379354476985ab5fc901e066da/FLAG88e63de71 [2022-04-06 19:45:24,248 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:45:24,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-04-06 19:45:24,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2988ba90/c3da11379354476985ab5fc901e066da/FLAG88e63de71 [2022-04-06 19:45:24,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2988ba90/c3da11379354476985ab5fc901e066da [2022-04-06 19:45:24,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:45:24,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:45:24,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:45:24,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:45:24,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:45:24,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:45:24" (1/1) ... [2022-04-06 19:45:24,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784494d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24, skipping insertion in model container [2022-04-06 19:45:24,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:45:24" (1/1) ... [2022-04-06 19:45:24,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:45:24,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:45:24,882 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c[325,338] [2022-04-06 19:45:24,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:45:24,900 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:45:24,908 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c[325,338] [2022-04-06 19:45:24,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:45:24,926 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:45:24,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24 WrapperNode [2022-04-06 19:45:24,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:45:24,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:45:24,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:45:24,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:45:24,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24" (1/1) ... [2022-04-06 19:45:24,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24" (1/1) ... [2022-04-06 19:45:24,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24" (1/1) ... [2022-04-06 19:45:24,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24" (1/1) ... [2022-04-06 19:45:24,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24" (1/1) ... [2022-04-06 19:45:24,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24" (1/1) ... [2022-04-06 19:45:24,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24" (1/1) ... [2022-04-06 19:45:24,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:45:24,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:45:24,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:45:24,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:45:24,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24" (1/1) ... [2022-04-06 19:45:24,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:45:24,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:24,987 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 19:45:25,004 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 19:45:25,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:45:25,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:45:25,014 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:45:25,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:45:25,014 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-04-06 19:45:25,015 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:45:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:45:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:45:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:45:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:45:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:45:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-04-06 19:45:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:45:25,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:45:25,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:45:25,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:45:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:45:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:45:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:45:25,058 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:45:25,059 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:45:25,161 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:45:25,164 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:45:25,165 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 19:45:25,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:45:25 BoogieIcfgContainer [2022-04-06 19:45:25,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:45:25,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:45:25,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:45:25,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:45:25,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:45:24" (1/3) ... [2022-04-06 19:45:25,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f9ef70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:45:25, skipping insertion in model container [2022-04-06 19:45:25,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:45:24" (2/3) ... [2022-04-06 19:45:25,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f9ef70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:45:25, skipping insertion in model container [2022-04-06 19:45:25,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:45:25" (3/3) ... [2022-04-06 19:45:25,181 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2022-04-06 19:45:25,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:45:25,184 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:45:25,239 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:45:25,253 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 19:45:25,253 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:45:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:45:25,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:45:25,268 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:25,268 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:25,269 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:25,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:25,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 1 times [2022-04-06 19:45:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:25,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204452269] [2022-04-06 19:45:25,294 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:45:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 2 times [2022-04-06 19:45:25,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:25,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883999737] [2022-04-06 19:45:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:25,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:25,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:25,430 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 19:45:25,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:25,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883999737] [2022-04-06 19:45:25,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883999737] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:25,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:25,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:45:25,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:25,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204452269] [2022-04-06 19:45:25,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204452269] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:25,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:25,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:45:25,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753633802] [2022-04-06 19:45:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:25,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:45:25,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:25,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:45:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:45:25,460 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:25,502 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-06 19:45:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:45:25,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 19:45:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:25,508 INFO L225 Difference]: With dead ends: 34 [2022-04-06 19:45:25,508 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 19:45:25,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:45:25,514 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:25,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:45:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 19:45:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 19:45:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:45:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-04-06 19:45:25,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2022-04-06 19:45:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:25,542 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-04-06 19:45:25,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:25,543 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-04-06 19:45:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:45:25,543 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:25,543 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:25,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:45:25,544 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:25,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 1 times [2022-04-06 19:45:25,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:25,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [228324341] [2022-04-06 19:45:25,546 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:45:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 2 times [2022-04-06 19:45:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:25,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647171633] [2022-04-06 19:45:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:25,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:25,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:25,658 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 19:45:25,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:25,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647171633] [2022-04-06 19:45:25,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647171633] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:25,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:25,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:45:25,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:25,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [228324341] [2022-04-06 19:45:25,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [228324341] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:25,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:25,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:45:25,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165178815] [2022-04-06 19:45:25,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:25,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:45:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:45:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:45:25,662 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:25,702 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-04-06 19:45:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:45:25,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 19:45:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:25,704 INFO L225 Difference]: With dead ends: 25 [2022-04-06 19:45:25,704 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 19:45:25,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:45:25,707 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:25,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:45:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 19:45:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-04-06 19:45:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:45:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-04-06 19:45:25,725 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2022-04-06 19:45:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:25,725 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-04-06 19:45:25,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-04-06 19:45:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 19:45:25,725 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:25,726 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:25,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:45:25,726 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:25,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1503524740, now seen corresponding path program 1 times [2022-04-06 19:45:25,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:25,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725406897] [2022-04-06 19:45:25,746 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:25,746 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:25,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1503524740, now seen corresponding path program 2 times [2022-04-06 19:45:25,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:25,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896563208] [2022-04-06 19:45:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:25,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:25,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:25,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896563208] [2022-04-06 19:45:25,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896563208] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:25,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784970935] [2022-04-06 19:45:25,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:25,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:25,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:25,879 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 19:45:25,880 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 19:45:25,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:25,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:45:25,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:26,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:45:26,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784970935] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:26,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:26,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 19:45:26,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:26,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725406897] [2022-04-06 19:45:26,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725406897] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:26,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:26,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:45:26,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039177990] [2022-04-06 19:45:26,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:26,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:45:26,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:26,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:45:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:45:26,126 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:45:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:26,207 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-04-06 19:45:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:45:26,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-04-06 19:45:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:26,208 INFO L225 Difference]: With dead ends: 28 [2022-04-06 19:45:26,208 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 19:45:26,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:45:26,209 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:26,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:45:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 19:45:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-04-06 19:45:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:45:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-04-06 19:45:26,215 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2022-04-06 19:45:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:26,215 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-04-06 19:45:26,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:45:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-04-06 19:45:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 19:45:26,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:26,216 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:26,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 19:45:26,443 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 19:45:26,444 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1270987934, now seen corresponding path program 3 times [2022-04-06 19:45:26,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:26,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1930868664] [2022-04-06 19:45:26,447 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:26,447 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1270987934, now seen corresponding path program 4 times [2022-04-06 19:45:26,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435950926] [2022-04-06 19:45:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:26,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:26,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:26,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:45:26,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:26,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435950926] [2022-04-06 19:45:26,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435950926] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:26,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978803033] [2022-04-06 19:45:26,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:26,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:26,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:26,592 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 19:45:26,593 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 19:45:26,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:26,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:45:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:45:26,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:45:26,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978803033] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:26,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:26,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 17 [2022-04-06 19:45:26,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:26,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1930868664] [2022-04-06 19:45:26,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1930868664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:26,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:26,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:45:26,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155242986] [2022-04-06 19:45:26,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:26,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:45:26,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:45:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:45:26,979 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:45:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:27,124 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-04-06 19:45:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:45:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2022-04-06 19:45:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:27,125 INFO L225 Difference]: With dead ends: 31 [2022-04-06 19:45:27,125 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 19:45:27,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:45:27,126 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 47 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 19:45:27,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 47 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 19:45:27,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-04-06 19:45:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:45:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-04-06 19:45:27,131 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2022-04-06 19:45:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:27,131 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-04-06 19:45:27,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:45:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-04-06 19:45:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 19:45:27,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:27,132 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:27,150 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 19:45:27,348 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 19:45:27,348 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash -371085120, now seen corresponding path program 5 times [2022-04-06 19:45:27,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:27,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1586140146] [2022-04-06 19:45:27,351 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:27,351 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:27,351 INFO L85 PathProgramCache]: Analyzing trace with hash -371085120, now seen corresponding path program 6 times [2022-04-06 19:45:27,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:27,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951239511] [2022-04-06 19:45:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:27,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:27,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:27,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:27,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:27,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 19:45:27,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:27,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951239511] [2022-04-06 19:45:27,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951239511] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:27,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900472375] [2022-04-06 19:45:27,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:27,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:27,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:27,517 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 19:45:27,518 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 19:45:27,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 19:45:27,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:27,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 19:45:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 19:45:27,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:45:27,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900472375] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:27,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:27,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 22 [2022-04-06 19:45:27,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:27,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1586140146] [2022-04-06 19:45:27,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1586140146] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:27,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:27,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:45:27,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236704682] [2022-04-06 19:45:27,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:27,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:45:27,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:27,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:45:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:45:27,921 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:45:28,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:28,099 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-06 19:45:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:45:28,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-04-06 19:45:28,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:28,101 INFO L225 Difference]: With dead ends: 34 [2022-04-06 19:45:28,101 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 19:45:28,101 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:45:28,102 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:28,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 58 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 19:45:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-04-06 19:45:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:45:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-06 19:45:28,108 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 29 [2022-04-06 19:45:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:28,109 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-06 19:45:28,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:45:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-06 19:45:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 19:45:28,110 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:28,110 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:28,140 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 19:45:28,322 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 19:45:28,323 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1928781922, now seen corresponding path program 7 times [2022-04-06 19:45:28,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:28,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909426803] [2022-04-06 19:45:28,326 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:28,326 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:28,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1928781922, now seen corresponding path program 8 times [2022-04-06 19:45:28,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:28,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729052750] [2022-04-06 19:45:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:28,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:28,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:28,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:28,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:28,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 19:45:28,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:28,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729052750] [2022-04-06 19:45:28,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729052750] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:28,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871050608] [2022-04-06 19:45:28,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:28,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:28,564 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 19:45:28,565 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 19:45:28,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:28,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:28,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 19:45:28,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 19:45:28,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:45:29,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871050608] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:29,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:29,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 27 [2022-04-06 19:45:29,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:29,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909426803] [2022-04-06 19:45:29,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909426803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:29,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:29,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:45:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582256839] [2022-04-06 19:45:29,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:29,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:45:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:29,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:45:29,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:45:29,150 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:45:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:29,401 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-04-06 19:45:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:45:29,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2022-04-06 19:45:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:29,402 INFO L225 Difference]: With dead ends: 37 [2022-04-06 19:45:29,402 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 19:45:29,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:45:29,403 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:29,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 69 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 19:45:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-04-06 19:45:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 19:45:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-04-06 19:45:29,409 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 35 [2022-04-06 19:45:29,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:29,409 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-04-06 19:45:29,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:45:29,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-04-06 19:45:29,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 19:45:29,410 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:29,410 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:29,428 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 19:45:29,626 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 19:45:29,626 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:29,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1005752324, now seen corresponding path program 9 times [2022-04-06 19:45:29,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:29,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138294404] [2022-04-06 19:45:29,629 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:29,629 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:29,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1005752324, now seen corresponding path program 10 times [2022-04-06 19:45:29,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:29,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889707305] [2022-04-06 19:45:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:29,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:29,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:29,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:29,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:29,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:29,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:29,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 19:45:29,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:29,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889707305] [2022-04-06 19:45:29,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889707305] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:29,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876551211] [2022-04-06 19:45:29,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:29,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:29,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:29,856 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 19:45:29,866 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 19:45:29,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:45:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 19:45:30,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:30,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876551211] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:30,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:30,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 18] total 32 [2022-04-06 19:45:30,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:30,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [138294404] [2022-04-06 19:45:30,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [138294404] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:30,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:30,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:45:30,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013175287] [2022-04-06 19:45:30,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:30,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:45:30,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:45:30,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:45:30,391 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 19:45:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:30,601 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-04-06 19:45:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:45:30,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-04-06 19:45:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:30,602 INFO L225 Difference]: With dead ends: 40 [2022-04-06 19:45:30,602 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 19:45:30,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:45:30,603 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:30,603 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 70 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 19:45:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-04-06 19:45:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:45:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-04-06 19:45:30,608 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 41 [2022-04-06 19:45:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:30,608 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-04-06 19:45:30,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 19:45:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-04-06 19:45:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 19:45:30,609 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:30,609 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:30,638 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 19:45:30,819 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 19:45:30,820 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:30,820 INFO L85 PathProgramCache]: Analyzing trace with hash 119505370, now seen corresponding path program 11 times [2022-04-06 19:45:30,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:30,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2099223084] [2022-04-06 19:45:30,822 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:30,822 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash 119505370, now seen corresponding path program 12 times [2022-04-06 19:45:30,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:30,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520905875] [2022-04-06 19:45:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:30,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:30,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:30,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:30,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:31,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:31,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:31,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:31,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:45:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 19:45:31,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:31,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520905875] [2022-04-06 19:45:31,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520905875] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:31,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318936529] [2022-04-06 19:45:31,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:31,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:31,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:31,030 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 19:45:31,031 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 19:45:31,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:45:31,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:31,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 19:45:31,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 19:45:31,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 19:45:31,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318936529] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:31,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:31,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 21] total 37 [2022-04-06 19:45:31,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:31,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2099223084] [2022-04-06 19:45:31,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2099223084] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:31,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:31,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:45:31,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271073506] [2022-04-06 19:45:31,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:31,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:45:31,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:45:31,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:45:31,912 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:45:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:32,288 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-04-06 19:45:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:45:32,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2022-04-06 19:45:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:32,289 INFO L225 Difference]: With dead ends: 43 [2022-04-06 19:45:32,289 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 19:45:32,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=401, Invalid=2149, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:45:32,290 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:32,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 81 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:32,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 19:45:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-04-06 19:45:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 19:45:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-04-06 19:45:32,296 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 47 [2022-04-06 19:45:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:32,296 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-04-06 19:45:32,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:45:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-04-06 19:45:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 19:45:32,297 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:32,297 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:32,315 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 19:45:32,516 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 19:45:32,516 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1581790520, now seen corresponding path program 13 times [2022-04-06 19:45:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:32,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1048305534] [2022-04-06 19:45:32,518 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:32,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:32,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1581790520, now seen corresponding path program 14 times [2022-04-06 19:45:32,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:32,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623392895] [2022-04-06 19:45:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:32,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:32,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:32,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:32,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:32,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:32,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:32,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:32,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:45:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:32,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:45:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-04-06 19:45:32,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:32,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623392895] [2022-04-06 19:45:32,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623392895] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:32,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399092197] [2022-04-06 19:45:32,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:32,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:32,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:32,780 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 19:45:32,822 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 19:45:32,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:32,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 19:45:32,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-04-06 19:45:33,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 19:45:33,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399092197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:33,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:33,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 42 [2022-04-06 19:45:33,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:33,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1048305534] [2022-04-06 19:45:33,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1048305534] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:33,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:33,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:45:33,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686372884] [2022-04-06 19:45:33,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:33,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:45:33,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:45:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:45:33,744 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 19:45:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:34,221 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-04-06 19:45:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:45:34,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 53 [2022-04-06 19:45:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:34,222 INFO L225 Difference]: With dead ends: 46 [2022-04-06 19:45:34,222 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 19:45:34,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=499, Invalid=2807, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:45:34,224 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:34,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 102 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 19:45:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-04-06 19:45:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 19:45:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-04-06 19:45:34,231 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 53 [2022-04-06 19:45:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:34,233 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-04-06 19:45:34,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 19:45:34,233 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-04-06 19:45:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 19:45:34,234 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:34,234 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:34,265 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 19:45:34,445 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 19:45:34,446 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash 526936598, now seen corresponding path program 15 times [2022-04-06 19:45:34,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:34,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1842778724] [2022-04-06 19:45:34,448 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:34,448 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:34,449 INFO L85 PathProgramCache]: Analyzing trace with hash 526936598, now seen corresponding path program 16 times [2022-04-06 19:45:34,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:34,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679938297] [2022-04-06 19:45:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:34,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:34,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:34,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:34,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:34,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:34,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:34,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:34,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:45:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:34,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:45:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:34,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:45:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 19:45:34,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:34,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679938297] [2022-04-06 19:45:34,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679938297] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:34,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471004640] [2022-04-06 19:45:34,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:34,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:34,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:34,722 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 19:45:34,723 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 19:45:34,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:34,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:34,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 19:45:34,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 19:45:35,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 19:45:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471004640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:35,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 27] total 47 [2022-04-06 19:45:35,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:35,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1842778724] [2022-04-06 19:45:35,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1842778724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:35,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:35,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:45:35,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021714708] [2022-04-06 19:45:35,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:35,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:45:35,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:45:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:45:35,724 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 19:45:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:36,359 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-04-06 19:45:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:45:36,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 59 [2022-04-06 19:45:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:36,360 INFO L225 Difference]: With dead ends: 49 [2022-04-06 19:45:36,360 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 19:45:36,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 102 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=607, Invalid=3553, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 19:45:36,362 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:36,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 98 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 19:45:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-04-06 19:45:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 19:45:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 19:45:36,368 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 59 [2022-04-06 19:45:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:36,368 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 19:45:36,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 19:45:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 19:45:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 19:45:36,369 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:36,369 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:36,386 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 19:45:36,583 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 19:45:36,584 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 741933172, now seen corresponding path program 17 times [2022-04-06 19:45:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1514522381] [2022-04-06 19:45:36,586 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:36,587 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:36,587 INFO L85 PathProgramCache]: Analyzing trace with hash 741933172, now seen corresponding path program 18 times [2022-04-06 19:45:36,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:36,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022207831] [2022-04-06 19:45:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:36,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:45:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:45:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:45:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:45:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 19:45:36,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:36,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022207831] [2022-04-06 19:45:36,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022207831] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:36,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491277640] [2022-04-06 19:45:36,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:36,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:36,922 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 19:45:36,923 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 19:45:36,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:45:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:36,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 19:45:36,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 19:45:37,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 19:45:38,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491277640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:38,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:38,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 30] total 52 [2022-04-06 19:45:38,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:38,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1514522381] [2022-04-06 19:45:38,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1514522381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:38,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:38,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:45:38,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214012758] [2022-04-06 19:45:38,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:38,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:45:38,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:45:38,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2341, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:45:38,244 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 19:45:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:38,908 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-04-06 19:45:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:45:38,908 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 65 [2022-04-06 19:45:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:38,909 INFO L225 Difference]: With dead ends: 52 [2022-04-06 19:45:38,909 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 19:45:38,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=725, Invalid=4387, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 19:45:38,911 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:38,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 19:45:38,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-04-06 19:45:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 13 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 19:45:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-04-06 19:45:38,924 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 65 [2022-04-06 19:45:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:38,925 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-04-06 19:45:38,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 19:45:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-04-06 19:45:38,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 19:45:38,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:38,927 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:38,945 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 19:45:39,142 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 19:45:39,143 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:39,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:39,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1337272238, now seen corresponding path program 19 times [2022-04-06 19:45:39,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:39,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2111151362] [2022-04-06 19:45:39,145 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:39,145 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:39,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1337272238, now seen corresponding path program 20 times [2022-04-06 19:45:39,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:39,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748933736] [2022-04-06 19:45:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:39,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:45:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:45:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:45:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:45:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:45:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 19:45:39,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:39,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748933736] [2022-04-06 19:45:39,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748933736] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:39,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491799370] [2022-04-06 19:45:39,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:39,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:39,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:39,483 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 19:45:39,500 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 19:45:39,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:39,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:39,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 19:45:39,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 19:45:39,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 19:45:41,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491799370] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:41,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:41,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 33] total 57 [2022-04-06 19:45:41,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:41,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2111151362] [2022-04-06 19:45:41,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2111151362] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:41,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:41,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 19:45:41,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572748300] [2022-04-06 19:45:41,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:41,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 19:45:41,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:41,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 19:45:41,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=2828, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:45:41,106 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 19:45:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:41,765 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-04-06 19:45:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:45:41,765 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 71 [2022-04-06 19:45:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:41,766 INFO L225 Difference]: With dead ends: 55 [2022-04-06 19:45:41,766 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 19:45:41,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=853, Invalid=5309, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 19:45:41,768 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:41,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 90 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 19:45:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-04-06 19:45:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 14 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 19:45:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-04-06 19:45:41,788 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 71 [2022-04-06 19:45:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:41,789 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-04-06 19:45:41,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 19:45:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-04-06 19:45:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 19:45:41,793 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:41,793 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:41,810 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 19:45:41,994 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 19:45:41,997 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1594282416, now seen corresponding path program 21 times [2022-04-06 19:45:41,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:41,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157487942] [2022-04-06 19:45:42,022 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:42,023 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:42,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1594282416, now seen corresponding path program 22 times [2022-04-06 19:45:42,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:42,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218506538] [2022-04-06 19:45:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:45:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:45:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:45:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:45:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:45:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:45:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-04-06 19:45:42,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:42,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218506538] [2022-04-06 19:45:42,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218506538] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:42,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636675534] [2022-04-06 19:45:42,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:42,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:42,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:42,411 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 19:45:42,453 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 19:45:42,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:42,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:42,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 113 conjunts are in the unsatisfiable core [2022-04-06 19:45:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-04-06 19:45:42,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 19:45:44,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636675534] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:44,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:44,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 36] total 62 [2022-04-06 19:45:44,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:44,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157487942] [2022-04-06 19:45:44,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157487942] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:44,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:44,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 19:45:44,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057499568] [2022-04-06 19:45:44,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:44,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 19:45:44,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:44,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 19:45:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=3361, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:45:44,257 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 19:45:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:45,094 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2022-04-06 19:45:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 19:45:45,094 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 77 [2022-04-06 19:45:45,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:45,095 INFO L225 Difference]: With dead ends: 58 [2022-04-06 19:45:45,095 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 19:45:45,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=991, Invalid=6319, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 19:45:45,097 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:45,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 116 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:45:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 19:45:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-04-06 19:45:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 19:45:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2022-04-06 19:45:45,103 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 77 [2022-04-06 19:45:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:45,103 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2022-04-06 19:45:45,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 19:45:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2022-04-06 19:45:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:45:45,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:45,104 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:45,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:45,306 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 19:45:45,307 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash 833473678, now seen corresponding path program 23 times [2022-04-06 19:45:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:45,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1359735383] [2022-04-06 19:45:45,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:45,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 833473678, now seen corresponding path program 24 times [2022-04-06 19:45:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:45,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903449663] [2022-04-06 19:45:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:45:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:45:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:45:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:45:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:45:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:45:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:45:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-04-06 19:45:45,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:45,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903449663] [2022-04-06 19:45:45,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903449663] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:45,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686170458] [2022-04-06 19:45:45,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:45,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:45,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:45,765 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 19:45:45,766 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 19:45:45,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 19:45:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:45,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 123 conjunts are in the unsatisfiable core [2022-04-06 19:45:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-04-06 19:45:46,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 19:45:47,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686170458] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:47,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:47,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 39] total 67 [2022-04-06 19:45:47,584 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:47,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1359735383] [2022-04-06 19:45:47,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1359735383] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:47,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:47,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 19:45:47,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222136857] [2022-04-06 19:45:47,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:47,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 19:45:47,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 19:45:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=3940, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 19:45:47,587 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 19:45:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:48,679 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-04-06 19:45:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 19:45:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 83 [2022-04-06 19:45:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:48,680 INFO L225 Difference]: With dead ends: 61 [2022-04-06 19:45:48,680 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 19:45:48,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 142 SyntacticMatches, 12 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1139, Invalid=7417, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 19:45:48,683 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:48,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 117 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:45:48,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 19:45:48,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-04-06 19:45:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 16 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 19:45:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-04-06 19:45:48,689 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 83 [2022-04-06 19:45:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:48,690 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-04-06 19:45:48,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 19:45:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-04-06 19:45:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 19:45:48,690 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:48,690 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:48,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:48,907 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 19:45:48,907 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1520916244, now seen corresponding path program 25 times [2022-04-06 19:45:48,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:48,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1454655212] [2022-04-06 19:45:48,909 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:48,909 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:48,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1520916244, now seen corresponding path program 26 times [2022-04-06 19:45:48,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:48,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988103201] [2022-04-06 19:45:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:48,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:45:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:45:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:45:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:45:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:45:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:45:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:45:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:45:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-04-06 19:45:49,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:49,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988103201] [2022-04-06 19:45:49,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988103201] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:49,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273476382] [2022-04-06 19:45:49,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:49,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:49,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:49,405 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 19:45:49,438 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 19:45:49,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:49,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:49,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 133 conjunts are in the unsatisfiable core [2022-04-06 19:45:49,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-04-06 19:45:49,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 19:45:51,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273476382] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:51,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:51,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 42] total 72 [2022-04-06 19:45:51,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:51,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1454655212] [2022-04-06 19:45:51,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1454655212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:51,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:51,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 19:45:51,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307352935] [2022-04-06 19:45:51,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:51,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 19:45:51,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:51,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 19:45:51,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=4565, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 19:45:51,784 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 19:45:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:52,994 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-04-06 19:45:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 19:45:52,994 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 89 [2022-04-06 19:45:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:52,995 INFO L225 Difference]: With dead ends: 64 [2022-04-06 19:45:52,995 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 19:45:52,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 152 SyntacticMatches, 13 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1297, Invalid=8603, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 19:45:52,997 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:52,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 108 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:45:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 19:45:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-04-06 19:45:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 17 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 19:45:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2022-04-06 19:45:53,005 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 89 [2022-04-06 19:45:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:53,005 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2022-04-06 19:45:53,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 19:45:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2022-04-06 19:45:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 19:45:53,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:53,006 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:53,027 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 19:45:53,225 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 19:45:53,225 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:53,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:53,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2029536970, now seen corresponding path program 27 times [2022-04-06 19:45:53,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:53,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [541167285] [2022-04-06 19:45:53,237 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:53,238 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:53,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2029536970, now seen corresponding path program 28 times [2022-04-06 19:45:53,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:53,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644987674] [2022-04-06 19:45:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:53,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:45:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:45:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:45:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:45:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:45:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:45:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:45:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:45:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:45:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-04-06 19:45:53,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644987674] [2022-04-06 19:45:53,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644987674] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71307699] [2022-04-06 19:45:53,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:53,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:53,831 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 19:45:53,832 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 19:45:53,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:53,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:53,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 143 conjunts are in the unsatisfiable core [2022-04-06 19:45:53,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-04-06 19:45:54,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 19:45:56,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71307699] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:56,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:56,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 45] total 77 [2022-04-06 19:45:56,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:56,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [541167285] [2022-04-06 19:45:56,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [541167285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:56,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:56,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 19:45:56,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639603345] [2022-04-06 19:45:56,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:56,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 19:45:56,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:56,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 19:45:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=5236, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 19:45:56,640 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 19:45:57,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:57,941 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2022-04-06 19:45:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 19:45:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 95 [2022-04-06 19:45:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:57,942 INFO L225 Difference]: With dead ends: 67 [2022-04-06 19:45:57,942 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 19:45:57,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 162 SyntacticMatches, 14 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1465, Invalid=9877, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 19:45:57,946 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:57,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 154 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:45:57,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 19:45:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-04-06 19:45:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 18 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 19:45:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-04-06 19:45:57,965 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 95 [2022-04-06 19:45:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:57,966 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-04-06 19:45:57,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 19:45:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-04-06 19:45:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 19:45:57,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:57,966 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:57,983 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 19:45:58,177 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 19:45:58,177 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash -346716632, now seen corresponding path program 29 times [2022-04-06 19:45:58,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:58,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2087670975] [2022-04-06 19:45:58,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:45:58,180 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:58,180 INFO L85 PathProgramCache]: Analyzing trace with hash -346716632, now seen corresponding path program 30 times [2022-04-06 19:45:58,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:58,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123464420] [2022-04-06 19:45:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:58,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:45:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:45:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:45:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:45:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:45:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:45:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:45:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:45:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:45:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:45:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:45:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:45:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:45:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:45:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:45:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-04-06 19:45:58,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:58,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123464420] [2022-04-06 19:45:58,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123464420] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:58,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706931635] [2022-04-06 19:45:58,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:58,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:58,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:58,791 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 19:45:58,796 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 19:45:59,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 19:45:59,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:59,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 154 conjunts are in the unsatisfiable core [2022-04-06 19:45:59,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-04-06 19:45:59,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 19:46:04,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706931635] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:05,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:05,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 49] total 83 [2022-04-06 19:46:05,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:05,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2087670975] [2022-04-06 19:46:05,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2087670975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:05,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:05,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 19:46:05,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281508326] [2022-04-06 19:46:05,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:05,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 19:46:05,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 19:46:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=6097, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 19:46:05,001 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 19:46:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:06,675 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2022-04-06 19:46:06,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 19:46:06,676 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 101 [2022-04-06 19:46:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:06,677 INFO L225 Difference]: With dead ends: 70 [2022-04-06 19:46:06,677 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 19:46:06,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 171 SyntacticMatches, 15 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1694, Invalid=11416, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 19:46:06,679 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:06,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 160 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:46:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 19:46:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-04-06 19:46:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 19 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 19:46:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-04-06 19:46:06,687 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 101 [2022-04-06 19:46:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:06,689 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-04-06 19:46:06,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 19:46:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-04-06 19:46:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 19:46:06,692 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:06,692 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:06,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 19:46:06,896 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 19:46:06,896 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2031175430, now seen corresponding path program 31 times [2022-04-06 19:46:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:06,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1878210899] [2022-04-06 19:46:06,898 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:06,898 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2031175430, now seen corresponding path program 32 times [2022-04-06 19:46:06,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:06,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058766792] [2022-04-06 19:46:06,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:06,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:46:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:46:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:46:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:46:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:46:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:46:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:46:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:46:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:46:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:46:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:46:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:46:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:46:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:46:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:46:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:46:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-04-06 19:46:07,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:07,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058766792] [2022-04-06 19:46:07,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058766792] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:07,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122820131] [2022-04-06 19:46:07,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:07,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:07,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:07,585 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 19:46:07,586 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 19:46:07,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:07,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:07,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 163 conjunts are in the unsatisfiable core [2022-04-06 19:46:07,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-04-06 19:46:08,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 19:46:10,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122820131] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:10,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:10,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 51] total 87 [2022-04-06 19:46:10,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:10,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1878210899] [2022-04-06 19:46:10,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1878210899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:10,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:10,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 19:46:10,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587114126] [2022-04-06 19:46:10,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:10,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 19:46:10,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:10,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 19:46:10,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=6716, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 19:46:10,830 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 19:46:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:12,310 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2022-04-06 19:46:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 19:46:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 107 [2022-04-06 19:46:12,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:12,311 INFO L225 Difference]: With dead ends: 73 [2022-04-06 19:46:12,311 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 19:46:12,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 182 SyntacticMatches, 16 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1831, Invalid=12689, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 19:46:12,312 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:12,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 141 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:46:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 19:46:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-04-06 19:46:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 20 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 19:46:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-04-06 19:46:12,322 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 107 [2022-04-06 19:46:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:12,325 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-04-06 19:46:12,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 19:46:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-04-06 19:46:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 19:46:12,326 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:12,326 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:12,345 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 19:46:12,535 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 19:46:12,535 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash 446982500, now seen corresponding path program 33 times [2022-04-06 19:46:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:12,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760616927] [2022-04-06 19:46:12,542 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:12,542 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash 446982500, now seen corresponding path program 34 times [2022-04-06 19:46:12,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:12,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626164429] [2022-04-06 19:46:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:46:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:46:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:46:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:46:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:46:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:46:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:46:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:46:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:46:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:46:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:46:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:46:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:46:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:46:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:46:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:46:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:46:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-04-06 19:46:13,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:13,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626164429] [2022-04-06 19:46:13,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626164429] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:13,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645076501] [2022-04-06 19:46:13,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:46:13,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:13,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:13,156 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 19:46:13,157 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 19:46:13,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:46:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:13,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 173 conjunts are in the unsatisfiable core [2022-04-06 19:46:13,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-04-06 19:46:13,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 19:46:16,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645076501] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:16,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:16,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 54] total 92 [2022-04-06 19:46:16,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:16,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1760616927] [2022-04-06 19:46:16,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1760616927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:16,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:16,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 19:46:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020642824] [2022-04-06 19:46:16,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:16,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 19:46:16,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 19:46:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=7525, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 19:46:16,409 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 19:46:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:17,763 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2022-04-06 19:46:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 19:46:17,763 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 113 [2022-04-06 19:46:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:17,765 INFO L225 Difference]: With dead ends: 76 [2022-04-06 19:46:17,765 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 19:46:17,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 192 SyntacticMatches, 17 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2029, Invalid=14227, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 19:46:17,767 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2691 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:17,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 202 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:46:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 19:46:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-04-06 19:46:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 21 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 19:46:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2022-04-06 19:46:17,784 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 113 [2022-04-06 19:46:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:17,785 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2022-04-06 19:46:17,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 19:46:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2022-04-06 19:46:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 19:46:17,786 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:17,786 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:17,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 19:46:17,995 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 19:46:17,996 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash 39832898, now seen corresponding path program 35 times [2022-04-06 19:46:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:17,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [110489868] [2022-04-06 19:46:17,998 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:17,998 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:17,998 INFO L85 PathProgramCache]: Analyzing trace with hash 39832898, now seen corresponding path program 36 times [2022-04-06 19:46:17,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:17,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168135057] [2022-04-06 19:46:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:17,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:46:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:46:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:46:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:46:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:46:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:46:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:46:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:46:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:46:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:46:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:46:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:46:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:46:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:46:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:46:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:46:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:46:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:46:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-04-06 19:46:18,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:18,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168135057] [2022-04-06 19:46:18,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168135057] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:18,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886656552] [2022-04-06 19:46:18,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:46:18,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:18,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:18,772 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 19:46:18,773 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 19:46:19,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 19:46:19,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:19,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 189 conjunts are in the unsatisfiable core [2022-04-06 19:46:19,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-04-06 19:46:19,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 19:46:23,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886656552] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:23,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:23,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 60] total 100 [2022-04-06 19:46:23,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:23,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [110489868] [2022-04-06 19:46:23,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [110489868] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:23,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:23,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 19:46:23,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023562829] [2022-04-06 19:46:23,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:23,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 19:46:23,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:23,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 19:46:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=8943, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 19:46:23,914 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 19:46:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:25,706 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-04-06 19:46:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 19:46:25,706 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 119 [2022-04-06 19:46:25,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:25,707 INFO L225 Difference]: With dead ends: 79 [2022-04-06 19:46:25,707 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 19:46:25,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 199 SyntacticMatches, 18 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2262, Invalid=16644, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 19:46:25,708 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2733 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:25,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 163 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:46:25,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 19:46:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-04-06 19:46:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 22 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 19:46:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-04-06 19:46:25,718 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 119 [2022-04-06 19:46:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:25,718 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-04-06 19:46:25,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 19:46:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-04-06 19:46:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 19:46:25,719 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:25,719 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:25,723 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 19:46:25,924 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 19:46:25,924 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:25,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:25,924 INFO L85 PathProgramCache]: Analyzing trace with hash -630435168, now seen corresponding path program 37 times [2022-04-06 19:46:25,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:25,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [969142057] [2022-04-06 19:46:25,931 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:25,931 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash -630435168, now seen corresponding path program 38 times [2022-04-06 19:46:25,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:25,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323435313] [2022-04-06 19:46:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:46:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:46:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:46:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:46:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:46:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:46:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:46:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:46:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:46:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:46:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:46:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:46:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:46:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:46:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:46:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:46:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:46:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:46:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:46:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-04-06 19:46:26,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323435313] [2022-04-06 19:46:26,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323435313] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144655986] [2022-04-06 19:46:26,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:26,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:26,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:26,823 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 19:46:26,836 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 19:46:26,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:26,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:26,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 193 conjunts are in the unsatisfiable core [2022-04-06 19:46:26,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-04-06 19:46:27,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 19:46:30,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144655986] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:30,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:30,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 60] total 102 [2022-04-06 19:46:30,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:30,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [969142057] [2022-04-06 19:46:30,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [969142057] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:30,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:30,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 19:46:30,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116365137] [2022-04-06 19:46:30,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:30,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 19:46:30,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:30,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 19:46:30,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=9281, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 19:46:30,988 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 19:46:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:32,899 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2022-04-06 19:46:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 19:46:32,900 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 125 [2022-04-06 19:46:32,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:32,900 INFO L225 Difference]: With dead ends: 82 [2022-04-06 19:46:32,900 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 19:46:32,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 212 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2455, Invalid=17567, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 19:46:32,903 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3176 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 3176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:32,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 199 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 3176 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:46:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 19:46:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-04-06 19:46:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 23 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 19:46:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-04-06 19:46:32,916 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 125 [2022-04-06 19:46:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:32,916 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-04-06 19:46:32,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 19:46:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-04-06 19:46:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 19:46:32,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:32,917 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:32,935 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 19:46:33,131 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 19:46:33,132 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:33,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2100635266, now seen corresponding path program 39 times [2022-04-06 19:46:33,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:33,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1238416355] [2022-04-06 19:46:33,133 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:33,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2100635266, now seen corresponding path program 40 times [2022-04-06 19:46:33,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:33,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618368610] [2022-04-06 19:46:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:33,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:46:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:46:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:46:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:46:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:46:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:46:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:46:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:46:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:46:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:46:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:46:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:46:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:46:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:46:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:46:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:46:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:46:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:46:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:46:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:46:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-04-06 19:46:33,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:33,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618368610] [2022-04-06 19:46:33,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618368610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:33,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844489885] [2022-04-06 19:46:33,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:46:33,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:33,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:33,992 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 19:46:34,021 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 19:46:34,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:46:34,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:34,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 203 conjunts are in the unsatisfiable core [2022-04-06 19:46:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-04-06 19:46:35,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 19:46:38,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844489885] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:38,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:38,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 63] total 107 [2022-04-06 19:46:38,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1238416355] [2022-04-06 19:46:38,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1238416355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:38,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:38,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 19:46:38,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223333765] [2022-04-06 19:46:38,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:38,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 19:46:38,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:38,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 19:46:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1114, Invalid=10228, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 19:46:38,202 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 19:46:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:40,589 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2022-04-06 19:46:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 19:46:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 131 [2022-04-06 19:46:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:40,590 INFO L225 Difference]: With dead ends: 85 [2022-04-06 19:46:40,591 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 19:46:40,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 222 SyntacticMatches, 20 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2683, Invalid=19369, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 19:46:40,592 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3225 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 3348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:40,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 160 Invalid, 3348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3225 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:46:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 19:46:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-04-06 19:46:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 24 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 19:46:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-04-06 19:46:40,603 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 131 [2022-04-06 19:46:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:40,604 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-04-06 19:46:40,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 19:46:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-04-06 19:46:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 19:46:40,605 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:40,605 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:40,621 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 19:46:40,819 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 19:46:40,820 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1330921948, now seen corresponding path program 41 times [2022-04-06 19:46:40,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:40,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1620357221] [2022-04-06 19:46:40,822 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:40,822 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:40,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1330921948, now seen corresponding path program 42 times [2022-04-06 19:46:40,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:40,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88497831] [2022-04-06 19:46:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:40,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:46:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:46:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:46:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:46:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:46:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:46:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:46:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:46:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:46:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:46:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:46:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:46:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:46:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:46:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:46:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:46:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:46:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:46:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:46:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:46:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:46:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-04-06 19:46:41,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:41,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88497831] [2022-04-06 19:46:41,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88497831] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:41,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128200443] [2022-04-06 19:46:41,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:46:41,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:41,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:41,837 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 19:46:41,879 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 19:46:42,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 19:46:42,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:42,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 219 conjunts are in the unsatisfiable core [2022-04-06 19:46:42,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-04-06 19:46:43,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 19:46:49,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128200443] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:49,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:49,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 69] total 115 [2022-04-06 19:46:49,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:49,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1620357221] [2022-04-06 19:46:49,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1620357221] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:49,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:49,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 19:46:49,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686172198] [2022-04-06 19:46:49,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:49,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 19:46:49,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 19:46:49,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1239, Invalid=11871, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 19:46:49,366 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 19:46:51,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:51,997 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-04-06 19:46:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 19:46:51,997 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 137 [2022-04-06 19:46:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:52,003 INFO L225 Difference]: With dead ends: 88 [2022-04-06 19:46:52,003 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 19:46:52,005 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 229 SyntacticMatches, 21 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2949, Invalid=22173, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 19:46:52,006 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 4024 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 4136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:52,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 251 Invalid, 4136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4024 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:46:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 19:46:52,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-04-06 19:46:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 25 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 19:46:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2022-04-06 19:46:52,020 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 137 [2022-04-06 19:46:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:52,027 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2022-04-06 19:46:52,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 19:46:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2022-04-06 19:46:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 19:46:52,043 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:52,043 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:52,048 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 19:46:52,249 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 19:46:52,249 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:52,249 INFO L85 PathProgramCache]: Analyzing trace with hash -977704006, now seen corresponding path program 43 times [2022-04-06 19:46:52,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:52,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386769281] [2022-04-06 19:46:52,251 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:46:52,251 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash -977704006, now seen corresponding path program 44 times [2022-04-06 19:46:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:52,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351165950] [2022-04-06 19:46:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:52,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:46:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:46:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:46:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:46:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:46:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:46:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:46:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:46:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:46:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:46:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:46:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:46:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:46:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:46:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:46:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:46:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:46:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:46:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:46:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:46:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:46:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:46:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-04-06 19:46:53,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351165950] [2022-04-06 19:46:53,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351165950] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709489973] [2022-04-06 19:46:53,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:53,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:53,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:53,356 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 19:46:53,357 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 19:46:53,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:53,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:53,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 223 conjunts are in the unsatisfiable core [2022-04-06 19:46:53,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-04-06 19:46:54,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 19:46:59,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709489973] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:59,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:59,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 69] total 117 [2022-04-06 19:46:59,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:59,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386769281] [2022-04-06 19:46:59,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386769281] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:59,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:59,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 19:46:59,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027884208] [2022-04-06 19:46:59,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:59,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 19:46:59,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 19:46:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1312, Invalid=12260, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 19:46:59,186 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 19:47:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:01,681 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-04-06 19:47:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 19:47:01,681 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 143 [2022-04-06 19:47:01,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:01,682 INFO L225 Difference]: With dead ends: 91 [2022-04-06 19:47:01,682 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 19:47:01,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 242 SyntacticMatches, 22 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3169, Invalid=23237, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 19:47:01,684 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 56 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 4391 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 4508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 4391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:01,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 262 Invalid, 4508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 4391 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:47:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 19:47:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-04-06 19:47:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 26 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 19:47:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-04-06 19:47:01,713 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 143 [2022-04-06 19:47:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:01,713 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-04-06 19:47:01,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 19:47:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-04-06 19:47:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 19:47:01,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:01,714 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:01,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 19:47:01,915 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 19:47:01,916 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:01,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash -612157672, now seen corresponding path program 45 times [2022-04-06 19:47:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:01,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1698002012] [2022-04-06 19:47:01,918 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:01,918 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash -612157672, now seen corresponding path program 46 times [2022-04-06 19:47:01,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:01,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002912005] [2022-04-06 19:47:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:01,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:47:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:47:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:47:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:47:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:47:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:47:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:47:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:47:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:47:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:47:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:47:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:02,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:47:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:47:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:47:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:47:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:47:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:47:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:47:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:47:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:47:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:47:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:47:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:47:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-04-06 19:47:03,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:03,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002912005] [2022-04-06 19:47:03,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002912005] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:03,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544905052] [2022-04-06 19:47:03,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:03,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:03,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:03,047 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 19:47:03,073 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 19:47:03,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:03,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 233 conjunts are in the unsatisfiable core [2022-04-06 19:47:03,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-04-06 19:47:04,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 19:47:09,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544905052] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:09,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:09,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 72] total 122 [2022-04-06 19:47:09,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:09,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1698002012] [2022-04-06 19:47:09,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1698002012] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:09,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:09,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 19:47:09,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376073] [2022-04-06 19:47:09,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:09,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 19:47:09,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:09,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 19:47:09,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1417, Invalid=13345, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 19:47:09,493 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 19:47:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:11,832 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2022-04-06 19:47:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 19:47:11,833 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 149 [2022-04-06 19:47:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:11,834 INFO L225 Difference]: With dead ends: 94 [2022-04-06 19:47:11,834 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 19:47:11,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 252 SyntacticMatches, 23 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=3427, Invalid=25303, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 19:47:11,836 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 58 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:11,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 243 Invalid, 4716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4588 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:47:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 19:47:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-04-06 19:47:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 27 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 19:47:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-04-06 19:47:11,852 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 149 [2022-04-06 19:47:11,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:11,852 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-04-06 19:47:11,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 19:47:11,852 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-04-06 19:47:11,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 19:47:11,854 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:11,854 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:11,870 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 19:47:12,057 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 19:47:12,057 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:12,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:12,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1273854986, now seen corresponding path program 47 times [2022-04-06 19:47:12,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:12,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651498425] [2022-04-06 19:47:12,059 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:12,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1273854986, now seen corresponding path program 48 times [2022-04-06 19:47:12,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:12,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299338781] [2022-04-06 19:47:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:12,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:47:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:47:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:47:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:47:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:47:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:47:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:47:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:47:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:47:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:47:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:47:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:47:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:47:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:47:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:47:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:47:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:47:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:47:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:47:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:47:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:47:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:47:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:47:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:47:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2022-04-06 19:47:13,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299338781] [2022-04-06 19:47:13,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299338781] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798612747] [2022-04-06 19:47:13,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:13,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:13,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:13,288 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 19:47:13,319 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 19:47:15,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 19:47:15,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:15,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 246 conjunts are in the unsatisfiable core [2022-04-06 19:47:15,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2022-04-06 19:47:16,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 19:47:23,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798612747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:23,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:23,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 78] total 130 [2022-04-06 19:47:23,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:23,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651498425] [2022-04-06 19:47:23,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651498425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:23,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:23,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 19:47:23,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794221392] [2022-04-06 19:47:23,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:23,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 19:47:23,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:23,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 19:47:23,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=15213, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 19:47:23,490 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 19:47:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:26,951 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2022-04-06 19:47:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 19:47:26,952 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 155 [2022-04-06 19:47:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:26,952 INFO L225 Difference]: With dead ends: 97 [2022-04-06 19:47:26,953 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 19:47:26,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 259 SyntacticMatches, 24 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3181 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=3726, Invalid=28494, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 19:47:26,955 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 60 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4533 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 4680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 4533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:26,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 184 Invalid, 4680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 4533 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 19:47:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 19:47:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-04-06 19:47:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 28 states have call successors, (28), 4 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 19:47:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2022-04-06 19:47:26,976 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 155 [2022-04-06 19:47:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:26,976 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2022-04-06 19:47:26,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 19:47:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2022-04-06 19:47:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 19:47:26,977 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:26,977 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:26,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:27,179 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 19:47:27,180 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:27,180 INFO L85 PathProgramCache]: Analyzing trace with hash -559926700, now seen corresponding path program 49 times [2022-04-06 19:47:27,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:27,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1984737683] [2022-04-06 19:47:27,182 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:27,182 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash -559926700, now seen corresponding path program 50 times [2022-04-06 19:47:27,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:27,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658552816] [2022-04-06 19:47:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:27,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:47:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:47:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:47:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:47:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:47:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:47:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:47:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:47:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:47:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:47:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:47:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:47:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:47:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:47:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:47:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:47:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:47:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:47:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:47:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:47:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:47:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:47:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:47:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:47:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:47:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-04-06 19:47:28,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:28,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658552816] [2022-04-06 19:47:28,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658552816] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:28,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523985107] [2022-04-06 19:47:28,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:28,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:28,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:28,490 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:28,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 19:47:28,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:28,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:28,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 253 conjunts are in the unsatisfiable core [2022-04-06 19:47:28,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-04-06 19:47:29,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 19:47:35,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523985107] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:35,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:35,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 78] total 132 [2022-04-06 19:47:35,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1984737683] [2022-04-06 19:47:35,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1984737683] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:35,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:35,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 19:47:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604673864] [2022-04-06 19:47:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:35,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 19:47:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 19:47:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=15653, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 19:47:35,497 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 19:47:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:38,630 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2022-04-06 19:47:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 19:47:38,631 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 161 [2022-04-06 19:47:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:38,631 INFO L225 Difference]: With dead ends: 100 [2022-04-06 19:47:38,632 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 19:47:38,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 272 SyntacticMatches, 25 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3432 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3973, Invalid=29699, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 19:47:38,633 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5258 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 5400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 5258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:38,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 245 Invalid, 5400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 5258 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 19:47:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 19:47:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-04-06 19:47:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 29 states have call successors, (29), 4 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 19:47:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2022-04-06 19:47:38,647 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 161 [2022-04-06 19:47:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:38,647 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2022-04-06 19:47:38,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 19:47:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2022-04-06 19:47:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 19:47:38,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:38,648 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:38,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:38,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 19:47:38,864 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash 339550770, now seen corresponding path program 51 times [2022-04-06 19:47:38,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:38,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1178269021] [2022-04-06 19:47:38,866 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:38,866 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:38,866 INFO L85 PathProgramCache]: Analyzing trace with hash 339550770, now seen corresponding path program 52 times [2022-04-06 19:47:38,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:38,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862754058] [2022-04-06 19:47:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:38,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:47:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:47:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:47:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:47:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:47:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:47:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:47:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:47:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:47:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:47:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:47:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:47:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:47:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:47:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:47:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:47:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:47:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:47:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:47:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:47:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:47:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:47:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:47:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:47:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:47:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:47:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-04-06 19:47:40,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:40,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862754058] [2022-04-06 19:47:40,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862754058] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274114605] [2022-04-06 19:47:40,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:40,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:40,236 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:40,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 19:47:40,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:40,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:40,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 263 conjunts are in the unsatisfiable core [2022-04-06 19:47:40,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-04-06 19:47:41,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 19:47:46,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274114605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:46,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:46,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 81] total 137 [2022-04-06 19:47:46,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:46,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1178269021] [2022-04-06 19:47:46,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1178269021] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:46,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:46,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 19:47:46,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613627661] [2022-04-06 19:47:46,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:46,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 19:47:46,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 19:47:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1756, Invalid=16876, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 19:47:46,550 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 19:47:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:49,214 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2022-04-06 19:47:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 19:47:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 167 [2022-04-06 19:47:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:49,215 INFO L225 Difference]: With dead ends: 103 [2022-04-06 19:47:49,215 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 19:47:49,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 282 SyntacticMatches, 26 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3699 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=4261, Invalid=32029, Unknown=0, NotChecked=0, Total=36290 [2022-04-06 19:47:49,217 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 5628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:49,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 226 Invalid, 5628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 5475 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:47:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 19:47:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-04-06 19:47:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 30 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 19:47:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2022-04-06 19:47:49,250 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 167 [2022-04-06 19:47:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:49,252 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2022-04-06 19:47:49,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 19:47:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2022-04-06 19:47:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 19:47:49,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:49,253 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:49,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:49,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 19:47:49,453 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:49,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:49,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1976710032, now seen corresponding path program 53 times [2022-04-06 19:47:49,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:49,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [575924412] [2022-04-06 19:47:49,455 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:49,455 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:49,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1976710032, now seen corresponding path program 54 times [2022-04-06 19:47:49,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:49,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242284317] [2022-04-06 19:47:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:49,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:47:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:47:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:47:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:47:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:47:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:47:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:47:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:47:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:47:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:47:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:47:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:47:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:47:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:47:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:47:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:47:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:47:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:47:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:47:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:47:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:47:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:47:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:47:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:47:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:47:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:47:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:47:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2022-04-06 19:47:50,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:51,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242284317] [2022-04-06 19:47:51,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242284317] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:51,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851432188] [2022-04-06 19:47:51,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:51,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:51,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:51,001 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:51,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 19:47:53,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 19:47:53,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:53,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 279 conjunts are in the unsatisfiable core [2022-04-06 19:47:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2022-04-06 19:47:55,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-04-06 19:48:02,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851432188] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:02,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:02,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 87] total 145 [2022-04-06 19:48:02,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:02,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [575924412] [2022-04-06 19:48:02,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [575924412] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:02,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:02,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 19:48:02,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759942770] [2022-04-06 19:48:02,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:02,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 19:48:02,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:02,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 19:48:02,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1911, Invalid=18969, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 19:48:02,972 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 31 states have internal predecessors, (63), 29 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 19:48:07,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:07,277 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2022-04-06 19:48:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 19:48:07,277 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 31 states have internal predecessors, (63), 29 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 173 [2022-04-06 19:48:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:07,278 INFO L225 Difference]: With dead ends: 106 [2022-04-06 19:48:07,278 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 19:48:07,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 289 SyntacticMatches, 27 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3982 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4593, Invalid=35607, Unknown=0, NotChecked=0, Total=40200 [2022-04-06 19:48:07,280 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 66 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6011 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 6166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 6011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:07,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 252 Invalid, 6166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 6011 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 19:48:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 19:48:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-04-06 19:48:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 31 states have call successors, (31), 4 states have call predecessors, (31), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 19:48:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2022-04-06 19:48:07,296 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 173 [2022-04-06 19:48:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:07,296 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2022-04-06 19:48:07,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 31 states have internal predecessors, (63), 29 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 19:48:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2022-04-06 19:48:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 19:48:07,297 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:07,297 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:07,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:07,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 19:48:07,502 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:07,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:07,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1243629166, now seen corresponding path program 55 times [2022-04-06 19:48:07,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:07,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2004691032] [2022-04-06 19:48:07,504 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:07,504 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1243629166, now seen corresponding path program 56 times [2022-04-06 19:48:07,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:07,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407097463] [2022-04-06 19:48:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:07,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:48:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:48:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:48:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:48:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:48:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:48:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:48:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:48:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:48:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:48:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:48:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:48:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:48:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:48:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:48:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:48:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:48:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:48:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:48:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:48:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:48:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:48:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:48:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:48:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:48:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:48:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:48:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:48:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2022-04-06 19:48:08,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:08,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407097463] [2022-04-06 19:48:08,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407097463] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525213265] [2022-04-06 19:48:08,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:08,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:08,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:08,533 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:08,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 19:48:08,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:08,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:08,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 283 conjunts are in the unsatisfiable core [2022-04-06 19:48:08,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2022-04-06 19:48:09,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-04-06 19:48:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525213265] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:14,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:14,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 87] total 147 [2022-04-06 19:48:14,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:14,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2004691032] [2022-04-06 19:48:14,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2004691032] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:14,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:14,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 19:48:14,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632822549] [2022-04-06 19:48:14,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:14,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 19:48:14,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 19:48:15,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2002, Invalid=19460, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 19:48:15,000 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 32 states have internal predecessors, (65), 30 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 19:48:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:18,047 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2022-04-06 19:48:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 19:48:18,048 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 32 states have internal predecessors, (65), 30 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 179 [2022-04-06 19:48:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:18,049 INFO L225 Difference]: With dead ends: 109 [2022-04-06 19:48:18,049 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 19:48:18,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 302 SyntacticMatches, 28 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4263 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=4867, Invalid=36953, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 19:48:18,051 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 68 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 6785 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 6936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 6785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:18,051 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 308 Invalid, 6936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 6785 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 19:48:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 19:48:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2022-04-06 19:48:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 32 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 19:48:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 130 transitions. [2022-04-06 19:48:18,068 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 130 transitions. Word has length 179 [2022-04-06 19:48:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:18,068 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 130 transitions. [2022-04-06 19:48:18,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 32 states have internal predecessors, (65), 30 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 19:48:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 130 transitions. [2022-04-06 19:48:18,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 19:48:18,072 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:18,072 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:18,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:18,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:18,291 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1002453708, now seen corresponding path program 57 times [2022-04-06 19:48:18,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:18,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1801859542] [2022-04-06 19:48:18,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:18,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1002453708, now seen corresponding path program 58 times [2022-04-06 19:48:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:18,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974879243] [2022-04-06 19:48:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:48:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:48:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:48:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:48:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:48:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:48:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:48:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:48:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:48:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:48:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:48:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:48:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:48:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:48:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:48:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:48:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:48:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:48:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:48:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:48:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:48:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:48:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:48:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:48:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:48:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:48:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:48:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:48:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:48:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2465 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2022-04-06 19:48:19,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:19,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974879243] [2022-04-06 19:48:19,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974879243] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:19,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592530241] [2022-04-06 19:48:19,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:19,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:19,819 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:19,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 19:48:19,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:19,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:19,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 293 conjunts are in the unsatisfiable core [2022-04-06 19:48:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2465 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2022-04-06 19:48:21,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2465 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-04-06 19:48:27,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592530241] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:27,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:27,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 90] total 152 [2022-04-06 19:48:27,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:27,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1801859542] [2022-04-06 19:48:27,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1801859542] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:27,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:27,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 19:48:27,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478274699] [2022-04-06 19:48:27,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:27,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 19:48:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 19:48:27,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2131, Invalid=20821, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 19:48:27,881 INFO L87 Difference]: Start difference. First operand 102 states and 130 transitions. Second operand has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 33 states have internal predecessors, (67), 31 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 19:48:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:31,576 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2022-04-06 19:48:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 19:48:31,577 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 33 states have internal predecessors, (67), 31 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 185 [2022-04-06 19:48:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:31,578 INFO L225 Difference]: With dead ends: 112 [2022-04-06 19:48:31,578 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 19:48:31,580 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 312 SyntacticMatches, 29 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4560 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=5185, Invalid=39547, Unknown=0, NotChecked=0, Total=44732 [2022-04-06 19:48:31,580 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 7297 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 7452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 7297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:31,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 324 Invalid, 7452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 7297 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:48:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 19:48:31,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-04-06 19:48:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 33 states have call successors, (33), 4 states have call predecessors, (33), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 19:48:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2022-04-06 19:48:31,597 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 134 transitions. Word has length 185 [2022-04-06 19:48:31,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:31,597 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 134 transitions. [2022-04-06 19:48:31,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 33 states have internal predecessors, (67), 31 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 19:48:31,598 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 134 transitions. [2022-04-06 19:48:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 19:48:31,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:31,598 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:31,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:31,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:31,811 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash 388165802, now seen corresponding path program 59 times [2022-04-06 19:48:31,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:31,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354220639] [2022-04-06 19:48:31,813 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:31,813 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:31,813 INFO L85 PathProgramCache]: Analyzing trace with hash 388165802, now seen corresponding path program 60 times [2022-04-06 19:48:31,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:31,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041521096] [2022-04-06 19:48:31,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:31,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:48:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:48:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:48:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:48:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:48:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:48:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:48:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:48:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:48:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:48:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:48:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:48:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:48:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:48:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:48:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:48:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:48:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:48:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:48:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:48:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:48:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:48:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:48:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:48:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:48:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:48:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:48:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:48:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:48:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:48:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2022-04-06 19:48:33,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:33,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041521096] [2022-04-06 19:48:33,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041521096] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:33,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316027532] [2022-04-06 19:48:33,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:33,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:33,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:33,517 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:33,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 19:48:38,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-04-06 19:48:38,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:38,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 309 conjunts are in the unsatisfiable core [2022-04-06 19:48:38,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2022-04-06 19:48:40,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-04-06 19:48:51,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316027532] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:51,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:51,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 96] total 160 [2022-04-06 19:48:51,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:51,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354220639] [2022-04-06 19:48:51,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354220639] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:51,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:51,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 19:48:51,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158550465] [2022-04-06 19:48:51,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:51,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 19:48:51,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 19:48:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2301, Invalid=23139, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 19:48:51,957 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 34 states have internal predecessors, (69), 32 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 19:48:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:57,690 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2022-04-06 19:48:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 19:48:57,690 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 34 states have internal predecessors, (69), 32 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 191 [2022-04-06 19:48:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:57,691 INFO L225 Difference]: With dead ends: 115 [2022-04-06 19:48:57,691 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 19:48:57,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 319 SyntacticMatches, 30 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4873 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=5550, Invalid=43512, Unknown=0, NotChecked=0, Total=49062 [2022-04-06 19:48:57,694 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 72 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 6877 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 7061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 6877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:57,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 215 Invalid, 7061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 6877 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 19:48:57,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 19:48:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-04-06 19:48:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 34 states have call successors, (34), 4 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 19:48:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2022-04-06 19:48:57,712 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 191 [2022-04-06 19:48:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:57,713 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2022-04-06 19:48:57,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 34 states have internal predecessors, (69), 32 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 19:48:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2022-04-06 19:48:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 19:48:57,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:57,714 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:57,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:57,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 19:48:57,918 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:57,918 INFO L85 PathProgramCache]: Analyzing trace with hash 143738888, now seen corresponding path program 61 times [2022-04-06 19:48:57,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:57,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1824700434] [2022-04-06 19:48:57,920 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:57,920 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash 143738888, now seen corresponding path program 62 times [2022-04-06 19:48:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:57,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733951299] [2022-04-06 19:48:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:57,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:48:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:48:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:48:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:48:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:48:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:48:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:48:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:48:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:48:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:48:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:48:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:48:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:48:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:48:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:48:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:48:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:48:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:48:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:48:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:48:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:48:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:48:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:48:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:48:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:48:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:48:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:48:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:48:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:48:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:48:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:48:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2022-04-06 19:48:59,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:59,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733951299] [2022-04-06 19:48:59,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733951299] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:59,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133068457] [2022-04-06 19:48:59,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:59,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:59,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:59,712 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:59,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 19:48:59,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:59,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 313 conjunts are in the unsatisfiable core [2022-04-06 19:48:59,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2022-04-06 19:49:01,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-04-06 19:49:08,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133068457] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:08,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:08,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 96] total 162 [2022-04-06 19:49:08,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1824700434] [2022-04-06 19:49:08,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1824700434] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:08,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:08,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 19:49:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383660152] [2022-04-06 19:49:08,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:08,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 19:49:08,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 19:49:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2401, Invalid=23681, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 19:49:08,942 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 35 states have internal predecessors, (71), 33 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 19:49:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:14,223 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2022-04-06 19:49:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 19:49:14,224 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 35 states have internal predecessors, (71), 33 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 197 [2022-04-06 19:49:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:14,225 INFO L225 Difference]: With dead ends: 118 [2022-04-06 19:49:14,225 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 19:49:14,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 332 SyntacticMatches, 31 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5184 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=5851, Invalid=44999, Unknown=0, NotChecked=0, Total=50850 [2022-04-06 19:49:14,227 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 74 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 7673 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 7854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 7673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:14,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 266 Invalid, 7854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 7673 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 19:49:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 19:49:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-04-06 19:49:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 35 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 19:49:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 142 transitions. [2022-04-06 19:49:14,246 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 142 transitions. Word has length 197 [2022-04-06 19:49:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:14,246 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 142 transitions. [2022-04-06 19:49:14,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 35 states have internal predecessors, (71), 33 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 19:49:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 142 transitions. [2022-04-06 19:49:14,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 19:49:14,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:14,247 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:14,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 19:49:14,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:14,465 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1512841446, now seen corresponding path program 63 times [2022-04-06 19:49:14,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:14,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1776954880] [2022-04-06 19:49:14,467 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:14,468 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:14,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1512841446, now seen corresponding path program 64 times [2022-04-06 19:49:14,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:14,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830924188] [2022-04-06 19:49:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:14,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:15,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:15,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:49:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:49:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:49:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:49:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:49:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:49:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:49:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:49:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:49:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:49:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:49:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:49:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:49:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:49:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:49:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:49:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:49:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:49:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:49:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:49:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:49:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:49:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:49:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:49:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:49:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:49:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:49:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:49:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:49:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:49:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:49:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:49:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3008 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2022-04-06 19:49:16,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830924188] [2022-04-06 19:49:16,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830924188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001992975] [2022-04-06 19:49:16,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:49:16,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:16,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:16,139 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:49:16,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 19:49:16,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:49:16,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:16,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 323 conjunts are in the unsatisfiable core [2022-04-06 19:49:16,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3008 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2022-04-06 19:49:17,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3008 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 19:49:25,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001992975] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:25,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:25,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 99] total 167 [2022-04-06 19:49:25,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:25,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1776954880] [2022-04-06 19:49:25,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1776954880] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:25,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:25,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 19:49:25,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676657699] [2022-04-06 19:49:25,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:25,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 19:49:25,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:25,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 19:49:25,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2542, Invalid=25180, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 19:49:25,715 INFO L87 Difference]: Start difference. First operand 111 states and 142 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 36 states have internal predecessors, (73), 34 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 19:49:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:30,107 INFO L93 Difference]: Finished difference Result 121 states and 154 transitions. [2022-04-06 19:49:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 19:49:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 36 states have internal predecessors, (73), 34 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 203 [2022-04-06 19:49:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:30,108 INFO L225 Difference]: With dead ends: 121 [2022-04-06 19:49:30,108 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 19:49:30,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 342 SyntacticMatches, 32 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5511 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=6199, Invalid=47857, Unknown=0, NotChecked=0, Total=54056 [2022-04-06 19:49:30,111 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 76 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 8701 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 8874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 8701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:30,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 342 Invalid, 8874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 8701 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 19:49:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 19:49:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-04-06 19:49:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 36 states have call successors, (36), 4 states have call predecessors, (36), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 19:49:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 146 transitions. [2022-04-06 19:49:30,147 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 146 transitions. Word has length 203 [2022-04-06 19:49:30,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:30,147 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 146 transitions. [2022-04-06 19:49:30,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 36 states have internal predecessors, (73), 34 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 19:49:30,147 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 146 transitions. [2022-04-06 19:49:30,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 19:49:30,148 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:30,148 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:30,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 19:49:30,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:30,349 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1309910204, now seen corresponding path program 65 times [2022-04-06 19:49:30,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:30,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [291434258] [2022-04-06 19:49:30,351 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:30,351 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1309910204, now seen corresponding path program 66 times [2022-04-06 19:49:30,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:30,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236865944] [2022-04-06 19:49:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:30,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:49:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:49:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:49:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:49:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:49:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:49:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:49:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:49:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:49:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:49:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:49:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:49:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:49:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:49:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:49:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:49:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:49:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:49:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:49:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:49:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:49:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:49:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:49:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:49:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:49:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:49:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:49:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:49:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:49:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:49:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:49:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:49:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:49:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2022-04-06 19:49:31,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:31,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236865944] [2022-04-06 19:49:31,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236865944] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:31,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372363317] [2022-04-06 19:49:31,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:49:31,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:31,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:31,839 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:49:31,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 19:49:45,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-04-06 19:49:45,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:45,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 341 conjunts are in the unsatisfiable core [2022-04-06 19:49:45,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2022-04-06 19:49:47,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 19:50:28,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372363317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:28,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:28,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 106] total 176 [2022-04-06 19:50:28,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:28,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [291434258] [2022-04-06 19:50:28,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [291434258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:28,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:28,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 19:50:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918025950] [2022-04-06 19:50:28,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:28,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 19:50:28,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:28,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 19:50:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2766, Invalid=28034, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 19:50:28,118 INFO L87 Difference]: Start difference. First operand 114 states and 146 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 37 states have internal predecessors, (75), 35 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 19:50:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:36,366 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2022-04-06 19:50:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 19:50:36,366 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 37 states have internal predecessors, (75), 35 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 209 [2022-04-06 19:50:36,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:36,367 INFO L225 Difference]: With dead ends: 124 [2022-04-06 19:50:36,367 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 19:50:36,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 347 SyntacticMatches, 34 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5961 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=6703, Invalid=52589, Unknown=0, NotChecked=0, Total=59292 [2022-04-06 19:50:36,369 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 78 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 9115 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 9296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 9115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:36,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 338 Invalid, 9296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 9115 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 19:50:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 19:50:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-04-06 19:50:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 37 states have call successors, (37), 4 states have call predecessors, (37), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 19:50:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 150 transitions. [2022-04-06 19:50:36,390 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 150 transitions. Word has length 209 [2022-04-06 19:50:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:36,390 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 150 transitions. [2022-04-06 19:50:36,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 37 states have internal predecessors, (75), 35 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 19:50:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 150 transitions. [2022-04-06 19:50:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 19:50:36,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:36,391 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:36,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 19:50:36,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 19:50:36,597 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:36,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:36,598 INFO L85 PathProgramCache]: Analyzing trace with hash -811411678, now seen corresponding path program 67 times [2022-04-06 19:50:36,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:36,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892296411] [2022-04-06 19:50:36,600 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:36,600 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash -811411678, now seen corresponding path program 68 times [2022-04-06 19:50:36,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:36,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880676043] [2022-04-06 19:50:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:50:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:50:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:50:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:50:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:50:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:50:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:50:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:50:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:50:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:50:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:50:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:50:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:50:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:50:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:50:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:50:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:50:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:50:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:50:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:50:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:50:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:50:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:50:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:50:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:50:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:50:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:50:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:50:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:50:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:50:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:50:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:50:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:50:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:50:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3400 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2022-04-06 19:50:38,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:38,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880676043] [2022-04-06 19:50:38,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880676043] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:38,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896781622] [2022-04-06 19:50:38,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:50:38,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:38,512 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:38,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 19:50:38,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:50:38,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:38,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 343 conjunts are in the unsatisfiable core [2022-04-06 19:50:38,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3400 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2022-04-06 19:50:40,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3400 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-04-06 19:50:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896781622] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:49,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:49,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 105] total 177 [2022-04-06 19:50:49,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892296411] [2022-04-06 19:50:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892296411] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:49,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:49,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 19:50:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730800336] [2022-04-06 19:50:49,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:49,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 19:50:49,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 19:50:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2836, Invalid=28316, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 19:50:49,058 INFO L87 Difference]: Start difference. First operand 117 states and 150 transitions. Second operand has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 38 states have internal predecessors, (77), 36 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 19:50:53,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:53,761 INFO L93 Difference]: Finished difference Result 127 states and 162 transitions. [2022-04-06 19:50:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 19:50:53,762 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 38 states have internal predecessors, (77), 36 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 215 [2022-04-06 19:50:53,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:53,763 INFO L225 Difference]: With dead ends: 127 [2022-04-06 19:50:53,763 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 19:50:53,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 362 SyntacticMatches, 34 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6195 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=6925, Invalid=53837, Unknown=0, NotChecked=0, Total=60762 [2022-04-06 19:50:53,766 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 80 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 9203 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 9400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 9203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:53,766 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 294 Invalid, 9400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 9203 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 19:50:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 19:50:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-04-06 19:50:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 38 states have call successors, (38), 4 states have call predecessors, (38), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 19:50:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 154 transitions. [2022-04-06 19:50:53,809 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 154 transitions. Word has length 215 [2022-04-06 19:50:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:53,809 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 154 transitions. [2022-04-06 19:50:53,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 38 states have internal predecessors, (77), 36 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 19:50:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 154 transitions. [2022-04-06 19:50:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 19:50:53,810 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:53,810 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:53,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 19:50:54,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 19:50:54,023 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash -889686912, now seen corresponding path program 69 times [2022-04-06 19:50:54,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:54,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1879605252] [2022-04-06 19:50:54,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:54,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:54,025 INFO L85 PathProgramCache]: Analyzing trace with hash -889686912, now seen corresponding path program 70 times [2022-04-06 19:50:54,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:54,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899893379] [2022-04-06 19:50:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:54,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:50:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:50:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:50:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:50:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:50:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:50:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:50:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:50:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:50:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:50:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:50:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:50:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:50:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:50:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:50:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:50:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:50:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:50:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:50:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:50:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:50:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:50:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:50:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:50:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:50:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:50:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:50:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:50:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:50:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:50:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:50:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:50:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:50:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:50:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:50:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3605 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2022-04-06 19:50:56,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:56,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899893379] [2022-04-06 19:50:56,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899893379] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:56,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783080222] [2022-04-06 19:50:56,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:50:56,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:56,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:56,167 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:56,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 19:50:56,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:50:56,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:56,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 353 conjunts are in the unsatisfiable core [2022-04-06 19:50:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3605 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2022-04-06 19:50:58,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3605 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-04-06 19:51:09,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783080222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:09,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:09,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 108] total 182 [2022-04-06 19:51:09,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:09,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1879605252] [2022-04-06 19:51:09,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1879605252] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:09,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:09,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 19:51:09,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958638099] [2022-04-06 19:51:09,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:09,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 19:51:09,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:09,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 19:51:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2989, Invalid=29953, Unknown=0, NotChecked=0, Total=32942 [2022-04-06 19:51:09,155 INFO L87 Difference]: Start difference. First operand 120 states and 154 transitions. Second operand has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 39 states have internal predecessors, (79), 37 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 19:51:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:15,189 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2022-04-06 19:51:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 19:51:15,190 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 39 states have internal predecessors, (79), 37 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 221 [2022-04-06 19:51:15,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:15,193 INFO L225 Difference]: With dead ends: 130 [2022-04-06 19:51:15,193 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 19:51:15,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 372 SyntacticMatches, 35 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6552 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=7303, Invalid=56959, Unknown=0, NotChecked=0, Total=64262 [2022-04-06 19:51:15,196 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 82 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 10618 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 10800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 10618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:15,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 405 Invalid, 10800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 10618 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 19:51:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 19:51:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-04-06 19:51:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 39 states have call successors, (39), 4 states have call predecessors, (39), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 19:51:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2022-04-06 19:51:15,225 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 221 [2022-04-06 19:51:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:15,236 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2022-04-06 19:51:15,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 39 states have internal predecessors, (79), 37 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 19:51:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2022-04-06 19:51:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 19:51:15,237 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:15,237 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:15,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 19:51:15,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 19:51:15,438 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:15,438 INFO L85 PathProgramCache]: Analyzing trace with hash -781315234, now seen corresponding path program 71 times [2022-04-06 19:51:15,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:15,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204877483] [2022-04-06 19:51:15,440 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:15,440 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:15,440 INFO L85 PathProgramCache]: Analyzing trace with hash -781315234, now seen corresponding path program 72 times [2022-04-06 19:51:15,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:15,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762882000] [2022-04-06 19:51:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:15,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:51:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:51:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:51:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:51:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:51:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:51:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:51:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:51:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:51:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:51:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:51:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:51:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:51:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:51:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:51:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:51:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:51:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:51:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:51:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:51:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:51:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:51:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:51:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:51:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:51:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:51:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:51:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:51:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:51:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:51:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:51:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:51:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:51:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:51:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:51:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:51:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3816 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2022-04-06 19:51:17,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:17,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762882000] [2022-04-06 19:51:17,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762882000] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:17,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319202210] [2022-04-06 19:51:17,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:51:17,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:17,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:17,624 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:51:17,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 19:51:31,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-04-06 19:51:31,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:31,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 369 conjunts are in the unsatisfiable core [2022-04-06 19:51:31,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3816 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2022-04-06 19:51:33,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3816 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-04-06 19:51:47,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319202210] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:47,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:47,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 114] total 190 [2022-04-06 19:51:47,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:47,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204877483] [2022-04-06 19:51:47,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204877483] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:47,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:47,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 19:51:47,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025594238] [2022-04-06 19:51:47,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:47,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 19:51:47,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:47,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 19:51:47,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3189, Invalid=32721, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 19:51:47,590 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 40 states have internal predecessors, (81), 38 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 19:51:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:54,612 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2022-04-06 19:51:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 19:51:54,613 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 40 states have internal predecessors, (81), 38 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 227 [2022-04-06 19:51:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:54,614 INFO L225 Difference]: With dead ends: 133 [2022-04-06 19:51:54,614 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 19:51:54,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 379 SyntacticMatches, 36 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6925 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=7734, Invalid=61698, Unknown=0, NotChecked=0, Total=69432 [2022-04-06 19:51:54,617 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 84 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9977 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 10192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 9977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:54,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 276 Invalid, 10192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 9977 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 19:51:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 19:51:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-04-06 19:51:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 40 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 19:51:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2022-04-06 19:51:54,640 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 227 [2022-04-06 19:51:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:54,640 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2022-04-06 19:51:54,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 40 states have internal predecessors, (81), 38 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 19:51:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2022-04-06 19:51:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 19:51:54,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:54,642 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:54,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 19:51:54,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:54,848 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1683788732, now seen corresponding path program 73 times [2022-04-06 19:51:54,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:54,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1023605012] [2022-04-06 19:51:54,850 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:54,850 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:54,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1683788732, now seen corresponding path program 74 times [2022-04-06 19:51:54,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:54,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683311386] [2022-04-06 19:51:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:54,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:51:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:51:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:51:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:51:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:51:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:51:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:51:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:51:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:51:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:51:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:51:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:51:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:51:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:51:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:51:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:51:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:51:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:51:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:51:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:51:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:51:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:51:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:51:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:51:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:51:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:51:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:51:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:51:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:51:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:51:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:51:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:51:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:51:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:51:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:51:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:51:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:51:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4033 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2022-04-06 19:51:56,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683311386] [2022-04-06 19:51:56,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683311386] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305250534] [2022-04-06 19:51:56,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:51:56,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:56,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:56,488 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:51:56,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 19:51:56,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:51:56,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:56,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 373 conjunts are in the unsatisfiable core [2022-04-06 19:51:56,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4033 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2022-04-06 19:51:58,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4033 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2022-04-06 19:52:10,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305250534] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:10,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:10,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 114] total 192 [2022-04-06 19:52:10,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:10,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1023605012] [2022-04-06 19:52:10,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1023605012] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:10,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:10,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 19:52:10,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31789192] [2022-04-06 19:52:10,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:10,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 19:52:10,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:10,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 19:52:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3307, Invalid=33365, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 19:52:10,059 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 41 states have internal predecessors, (83), 39 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 19:52:16,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:16,774 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2022-04-06 19:52:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 19:52:16,774 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 41 states have internal predecessors, (83), 39 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Word has length 233 [2022-04-06 19:52:16,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:16,775 INFO L225 Difference]: With dead ends: 136 [2022-04-06 19:52:16,775 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 19:52:16,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 392 SyntacticMatches, 37 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7296 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=8089, Invalid=63467, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 19:52:16,779 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 86 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 10241 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 10468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 10241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:16,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 252 Invalid, 10468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 10241 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 19:52:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 19:52:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-04-06 19:52:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 41 states have call successors, (41), 4 states have call predecessors, (41), 2 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 19:52:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 166 transitions. [2022-04-06 19:52:16,804 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 166 transitions. Word has length 233 [2022-04-06 19:52:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:16,805 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 166 transitions. [2022-04-06 19:52:16,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 41 states have internal predecessors, (83), 39 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 19:52:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 166 transitions. [2022-04-06 19:52:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 19:52:16,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:16,806 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:16,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 19:52:17,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 19:52:17,008 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:17,008 INFO L85 PathProgramCache]: Analyzing trace with hash 385144218, now seen corresponding path program 75 times [2022-04-06 19:52:17,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:17,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [377903021] [2022-04-06 19:52:17,010 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:17,010 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash 385144218, now seen corresponding path program 76 times [2022-04-06 19:52:17,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:17,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589793412] [2022-04-06 19:52:17,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:17,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:52:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:52:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:52:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:52:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:52:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:52:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:52:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:52:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:52:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:52:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:52:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:52:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:52:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:52:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:52:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:52:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:52:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:52:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:52:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:52:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:52:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:52:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:52:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:52:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:52:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:52:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:52:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:52:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:52:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:52:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:52:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:52:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:52:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:52:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:52:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:52:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:52:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:52:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4256 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 2109 trivial. 0 not checked. [2022-04-06 19:52:18,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:18,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589793412] [2022-04-06 19:52:18,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589793412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:18,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471052384] [2022-04-06 19:52:18,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:52:18,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:18,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:18,825 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:52:18,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 19:52:18,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:52:18,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:19,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 383 conjunts are in the unsatisfiable core [2022-04-06 19:52:19,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4256 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 2109 trivial. 0 not checked. [2022-04-06 19:52:21,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4256 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-04-06 19:52:32,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471052384] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:32,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:32,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 117] total 197 [2022-04-06 19:52:32,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:32,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [377903021] [2022-04-06 19:52:32,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [377903021] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:32,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:32,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 19:52:32,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730581301] [2022-04-06 19:52:32,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:32,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 19:52:32,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 19:52:32,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3472, Invalid=35140, Unknown=0, NotChecked=0, Total=38612 [2022-04-06 19:52:32,754 INFO L87 Difference]: Start difference. First operand 129 states and 166 transitions. Second operand has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 42 states have internal predecessors, (85), 40 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 19:52:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:38,763 INFO L93 Difference]: Finished difference Result 139 states and 178 transitions. [2022-04-06 19:52:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 19:52:38,763 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 42 states have internal predecessors, (85), 40 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Word has length 239 [2022-04-06 19:52:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:38,764 INFO L225 Difference]: With dead ends: 139 [2022-04-06 19:52:38,764 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 19:52:38,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 402 SyntacticMatches, 38 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7683 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=8497, Invalid=66853, Unknown=0, NotChecked=0, Total=75350 [2022-04-06 19:52:38,767 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 88 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 11151 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 11376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 11151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:38,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 298 Invalid, 11376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 11151 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 19:52:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 19:52:38,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2022-04-06 19:52:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 42 states have call successors, (42), 4 states have call predecessors, (42), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 19:52:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 170 transitions. [2022-04-06 19:52:38,793 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 170 transitions. Word has length 239 [2022-04-06 19:52:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:38,793 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 170 transitions. [2022-04-06 19:52:38,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 42 states have internal predecessors, (85), 40 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 19:52:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 170 transitions. [2022-04-06 19:52:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-04-06 19:52:38,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:38,794 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:38,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 19:52:39,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 19:52:39,011 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash -868239112, now seen corresponding path program 77 times [2022-04-06 19:52:39,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:39,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [471141772] [2022-04-06 19:52:39,014 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:39,014 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:39,014 INFO L85 PathProgramCache]: Analyzing trace with hash -868239112, now seen corresponding path program 78 times [2022-04-06 19:52:39,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:39,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872618615] [2022-04-06 19:52:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:39,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:52:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:52:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:52:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:52:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:52:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:52:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:52:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:52:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:52:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:52:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:52:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:52:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:52:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:52:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:52:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:52:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:52:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:52:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:52:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:52:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:52:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:52:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:52:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:52:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:52:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:52:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:52:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:52:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:52:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:52:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:52:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:52:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:52:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:52:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:52:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:52:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:52:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:52:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-06 19:52:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4485 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 2223 trivial. 0 not checked. [2022-04-06 19:52:40,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:40,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872618615] [2022-04-06 19:52:40,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872618615] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:40,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167514761] [2022-04-06 19:52:40,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:52:40,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:40,926 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:52:40,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 19:52:59,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-04-06 19:52:59,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:59,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 399 conjunts are in the unsatisfiable core [2022-04-06 19:52:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4485 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 2223 trivial. 0 not checked. [2022-04-06 19:53:02,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4485 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-04-06 19:53:20,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167514761] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:20,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:20,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 123] total 205 [2022-04-06 19:53:20,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:20,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [471141772] [2022-04-06 19:53:20,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [471141772] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:20,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:20,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 19:53:20,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186848274] [2022-04-06 19:53:20,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:20,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 19:53:20,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 19:53:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3687, Invalid=38133, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 19:53:20,592 INFO L87 Difference]: Start difference. First operand 132 states and 170 transitions. Second operand has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 43 states have internal predecessors, (87), 41 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 19:53:27,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:53:27,923 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2022-04-06 19:53:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 19:53:27,924 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 43 states have internal predecessors, (87), 41 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 245 [2022-04-06 19:53:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:53:27,926 INFO L225 Difference]: With dead ends: 142 [2022-04-06 19:53:27,926 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 19:53:27,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 409 SyntacticMatches, 39 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8086 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=8961, Invalid=71979, Unknown=0, NotChecked=0, Total=80940 [2022-04-06 19:53:27,930 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 90 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 11621 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 11854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 11621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:53:27,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 294 Invalid, 11854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 11621 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 19:53:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 19:53:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-04-06 19:53:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 43 states have call successors, (43), 4 states have call predecessors, (43), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 19:53:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 174 transitions. [2022-04-06 19:53:28,008 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 174 transitions. Word has length 245 [2022-04-06 19:53:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:53:28,008 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 174 transitions. [2022-04-06 19:53:28,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 43 states have internal predecessors, (87), 41 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 19:53:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 174 transitions. [2022-04-06 19:53:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-04-06 19:53:28,009 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:53:28,009 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:53:28,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 19:53:28,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:28,217 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:53:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:53:28,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1964907990, now seen corresponding path program 79 times [2022-04-06 19:53:28,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:28,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169218377] [2022-04-06 19:53:28,219 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:53:28,219 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:53:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1964907990, now seen corresponding path program 80 times [2022-04-06 19:53:28,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:53:28,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972200412] [2022-04-06 19:53:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:53:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:53:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:53:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:53:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:53:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:53:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:53:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:53:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:53:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:53:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:53:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:53:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:53:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:53:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:53:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:53:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:53:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:53:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:53:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:53:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:53:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:53:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:53:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:53:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:53:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:53:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:53:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:53:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:53:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:53:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:53:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:53:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:53:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:53:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:53:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:53:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:53:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:53:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:53:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:53:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:53:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-06 19:53:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-06 19:53:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4720 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2022-04-06 19:53:30,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:53:30,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972200412] [2022-04-06 19:53:30,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972200412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:53:30,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517191304] [2022-04-06 19:53:30,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:53:30,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:53:30,912 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:53:30,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 19:53:31,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:53:31,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:53:31,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 403 conjunts are in the unsatisfiable core [2022-04-06 19:53:31,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4720 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2022-04-06 19:53:33,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4720 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-04-06 19:53:44,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517191304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:44,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:44,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 123] total 207 [2022-04-06 19:53:44,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:44,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169218377] [2022-04-06 19:53:44,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169218377] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:44,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:44,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 19:53:44,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202485854] [2022-04-06 19:53:44,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:44,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 19:53:44,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 19:53:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3814, Invalid=38828, Unknown=0, NotChecked=0, Total=42642 [2022-04-06 19:53:44,855 INFO L87 Difference]: Start difference. First operand 135 states and 174 transitions. Second operand has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 44 states have internal predecessors, (89), 42 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 19:53:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:53:51,457 INFO L93 Difference]: Finished difference Result 145 states and 186 transitions. [2022-04-06 19:53:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 19:53:51,457 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 44 states have internal predecessors, (89), 42 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Word has length 251 [2022-04-06 19:53:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:53:51,458 INFO L225 Difference]: With dead ends: 145 [2022-04-06 19:53:51,458 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 19:53:51,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 422 SyntacticMatches, 40 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8487 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=9343, Invalid=73889, Unknown=0, NotChecked=0, Total=83232 [2022-04-06 19:53:51,462 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 13397 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 13611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 13397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:53:51,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 425 Invalid, 13611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 13397 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 19:53:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 19:53:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-04-06 19:53:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 44 states have call successors, (44), 4 states have call predecessors, (44), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 19:53:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 178 transitions. [2022-04-06 19:53:51,517 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 178 transitions. Word has length 251 [2022-04-06 19:53:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:53:51,518 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 178 transitions. [2022-04-06 19:53:51,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 44 states have internal predecessors, (89), 42 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 19:53:51,518 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 178 transitions. [2022-04-06 19:53:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-04-06 19:53:51,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:53:51,519 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:53:51,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 19:53:51,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 19:53:51,736 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:53:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:53:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1313399860, now seen corresponding path program 81 times [2022-04-06 19:53:51,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:51,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1943788585] [2022-04-06 19:53:51,738 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:53:51,738 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:53:51,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1313399860, now seen corresponding path program 82 times [2022-04-06 19:53:51,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:53:51,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147726953] [2022-04-06 19:53:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:53:51,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:53:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:53:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:53:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:53:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:53:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:53:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:53:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:53:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:53:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:53:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:53:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:53:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:53:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:53:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:53:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:53:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:53:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:53:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:53:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:53:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:53:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:53:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:53:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:53:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:53:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:53:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:53:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:53:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:53:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:53:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:53:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:53:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:53:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:53:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:53:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:53:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:53:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:53:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:53:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:53:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-06 19:53:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-06 19:53:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-04-06 19:53:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2022-04-06 19:53:54,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:53:54,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147726953] [2022-04-06 19:53:54,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147726953] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:53:54,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49510748] [2022-04-06 19:53:54,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:53:54,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:54,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:53:54,297 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:53:54,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 19:53:54,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:53:54,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:53:54,465 WARN L261 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 413 conjunts are in the unsatisfiable core [2022-04-06 19:53:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2022-04-06 19:53:57,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-04-06 19:54:09,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49510748] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:09,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:09,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 126] total 212 [2022-04-06 19:54:09,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:09,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1943788585] [2022-04-06 19:54:09,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1943788585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:09,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:09,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 19:54:09,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612020490] [2022-04-06 19:54:09,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:09,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 19:54:09,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 19:54:09,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3991, Invalid=40741, Unknown=0, NotChecked=0, Total=44732 [2022-04-06 19:54:09,865 INFO L87 Difference]: Start difference. First operand 138 states and 178 transitions. Second operand has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 45 states have internal predecessors, (91), 43 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 19:54:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:16,113 INFO L93 Difference]: Finished difference Result 148 states and 190 transitions. [2022-04-06 19:54:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 19:54:16,113 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 45 states have internal predecessors, (91), 43 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Word has length 257 [2022-04-06 19:54:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:16,116 INFO L225 Difference]: With dead ends: 148 [2022-04-06 19:54:16,116 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 19:54:16,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 432 SyntacticMatches, 41 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8904 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=9781, Invalid=77539, Unknown=0, NotChecked=0, Total=87320 [2022-04-06 19:54:16,123 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 94 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 12640 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 12888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 12640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:16,123 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 291 Invalid, 12888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 12640 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 19:54:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 19:54:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-04-06 19:54:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 45 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 19:54:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 182 transitions. [2022-04-06 19:54:16,171 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 182 transitions. Word has length 257 [2022-04-06 19:54:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:16,171 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 182 transitions. [2022-04-06 19:54:16,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 45 states have internal predecessors, (91), 43 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 19:54:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 182 transitions. [2022-04-06 19:54:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-04-06 19:54:16,173 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:16,173 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:16,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 19:54:16,390 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:16,390 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:16,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1638863854, now seen corresponding path program 83 times [2022-04-06 19:54:16,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:16,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1518760059] [2022-04-06 19:54:16,392 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:16,392 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:16,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1638863854, now seen corresponding path program 84 times [2022-04-06 19:54:16,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:16,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246743626] [2022-04-06 19:54:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:16,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:54:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:54:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:54:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:54:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:54:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:54:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:54:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:54:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:54:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:54:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:54:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:54:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:54:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:54:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:54:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:54:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:54:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:54:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:54:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:54:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:54:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:54:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:54:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:54:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:54:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:54:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:54:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:54:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:54:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:54:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:54:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:54:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:54:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:54:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:54:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:54:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:54:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:54:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-06 19:54:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-06 19:54:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-04-06 19:54:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-04-06 19:54:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5208 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 2583 trivial. 0 not checked. [2022-04-06 19:54:18,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:18,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246743626] [2022-04-06 19:54:18,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246743626] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:18,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370675759] [2022-04-06 19:54:18,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:54:18,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:18,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:18,387 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:54:18,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 19:55:06,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-04-06 19:55:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:55:06,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 429 conjunts are in the unsatisfiable core [2022-04-06 19:55:06,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:55:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5208 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 2583 trivial. 0 not checked. [2022-04-06 19:55:08,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:55:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5208 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-04-06 19:55:29,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370675759] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:55:29,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:55:29,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 132] total 220 [2022-04-06 19:55:29,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:55:29,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1518760059] [2022-04-06 19:55:29,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1518760059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:55:29,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:55:29,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 19:55:29,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310872116] [2022-04-06 19:55:29,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:55:29,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 19:55:29,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 19:55:29,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4221, Invalid=43959, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 19:55:29,213 INFO L87 Difference]: Start difference. First operand 141 states and 182 transitions. Second operand has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 46 states have internal predecessors, (93), 44 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 19:55:39,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:55:39,147 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2022-04-06 19:55:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 19:55:39,148 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 46 states have internal predecessors, (93), 44 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Word has length 263 [2022-04-06 19:55:39,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:55:39,149 INFO L225 Difference]: With dead ends: 151 [2022-04-06 19:55:39,149 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 19:55:39,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 439 SyntacticMatches, 42 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9337 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=10278, Invalid=83052, Unknown=0, NotChecked=0, Total=93330 [2022-04-06 19:55:39,154 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 96 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 14341 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 14573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 14341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:55:39,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 407 Invalid, 14573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 14341 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 19:55:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 19:55:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-04-06 19:55:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 46 states have call successors, (46), 4 states have call predecessors, (46), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 19:55:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 186 transitions. [2022-04-06 19:55:39,184 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 186 transitions. Word has length 263 [2022-04-06 19:55:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:55:39,185 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 186 transitions. [2022-04-06 19:55:39,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 46 states have internal predecessors, (93), 44 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 19:55:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 186 transitions. [2022-04-06 19:55:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-04-06 19:55:39,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:55:39,186 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:55:39,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 19:55:39,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:39,394 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:55:39,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:55:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash -207678096, now seen corresponding path program 85 times [2022-04-06 19:55:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:39,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1298124267] [2022-04-06 19:55:39,397 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:55:39,397 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:55:39,397 INFO L85 PathProgramCache]: Analyzing trace with hash -207678096, now seen corresponding path program 86 times [2022-04-06 19:55:39,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:55:39,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115523830] [2022-04-06 19:55:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:55:39,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:55:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:55:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:55:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:55:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:55:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:55:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:55:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:55:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:55:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:55:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:55:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:55:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:55:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:55:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:55:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:55:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:55:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:55:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:55:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:55:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:55:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:55:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:55:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:55:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:55:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:55:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:55:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:55:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:55:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:55:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:55:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:55:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:55:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:55:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:55:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:55:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:55:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:55:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:55:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:55:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-06 19:55:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-06 19:55:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-04-06 19:55:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-04-06 19:55:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-04-06 19:55:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5461 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 2709 trivial. 0 not checked. [2022-04-06 19:55:41,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:55:41,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115523830] [2022-04-06 19:55:41,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115523830] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:55:41,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529975044] [2022-04-06 19:55:41,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:55:41,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:41,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:55:41,566 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:55:41,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 19:55:41,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:55:41,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:55:41,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 433 conjunts are in the unsatisfiable core [2022-04-06 19:55:41,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:55:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5461 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 2709 trivial. 0 not checked. [2022-04-06 19:55:43,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:55:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5461 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-04-06 19:55:58,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529975044] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:55:58,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:55:58,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 132] total 222 [2022-04-06 19:55:58,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:55:58,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1298124267] [2022-04-06 19:55:58,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1298124267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:55:58,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:55:58,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 19:55:58,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178339906] [2022-04-06 19:55:58,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:55:58,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 19:55:58,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:58,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 19:55:58,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4357, Invalid=44705, Unknown=0, NotChecked=0, Total=49062 [2022-04-06 19:55:58,334 INFO L87 Difference]: Start difference. First operand 144 states and 186 transitions. Second operand has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 47 states have internal predecessors, (95), 45 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 19:56:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:08,676 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-04-06 19:56:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 19:56:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 47 states have internal predecessors, (95), 45 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Word has length 269 [2022-04-06 19:56:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:08,677 INFO L225 Difference]: With dead ends: 154 [2022-04-06 19:56:08,677 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 19:56:08,681 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 452 SyntacticMatches, 43 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9768 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=10687, Invalid=85103, Unknown=0, NotChecked=0, Total=95790 [2022-04-06 19:56:08,681 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 98 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 15029 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 15266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 15029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:08,681 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 418 Invalid, 15266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 15029 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 19:56:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 19:56:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2022-04-06 19:56:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 47 states have call successors, (47), 4 states have call predecessors, (47), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-06 19:56:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2022-04-06 19:56:08,733 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 269 [2022-04-06 19:56:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:08,734 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2022-04-06 19:56:08,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 47 states have internal predecessors, (95), 45 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 19:56:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2022-04-06 19:56:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-04-06 19:56:08,735 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:08,735 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:08,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 19:56:08,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 19:56:08,952 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash -495697842, now seen corresponding path program 87 times [2022-04-06 19:56:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:08,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1518213868] [2022-04-06 19:56:08,954 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:56:08,954 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:08,954 INFO L85 PathProgramCache]: Analyzing trace with hash -495697842, now seen corresponding path program 88 times [2022-04-06 19:56:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:08,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400910335] [2022-04-06 19:56:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:08,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:56:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:56:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:56:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:56:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:56:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:56:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:56:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:56:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:56:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:56:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:56:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:56:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:56:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:56:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:56:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:56:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:56:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:56:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:56:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:56:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:56:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:56:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:56:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:56:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:56:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:56:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:56:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:56:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:56:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:56:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:56:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:56:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:56:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:56:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:56:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:56:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:56:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:56:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-06 19:56:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-06 19:56:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-04-06 19:56:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-04-06 19:56:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-04-06 19:56:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-04-06 19:56:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2022-04-06 19:56:11,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:11,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400910335] [2022-04-06 19:56:11,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400910335] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:11,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793858763] [2022-04-06 19:56:11,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:56:11,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:11,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:11,967 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:56:11,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 19:56:12,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:56:12,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:12,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 443 conjunts are in the unsatisfiable core [2022-04-06 19:56:12,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2022-04-06 19:56:14,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-04-06 19:56:28,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793858763] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:28,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:28,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 135] total 227 [2022-04-06 19:56:28,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1518213868] [2022-04-06 19:56:28,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1518213868] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:28,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:28,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 19:56:28,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146771324] [2022-04-06 19:56:28,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:28,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 19:56:28,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 19:56:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4546, Invalid=46756, Unknown=0, NotChecked=0, Total=51302 [2022-04-06 19:56:28,589 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 48 states have internal predecessors, (97), 46 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-06 19:56:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:37,486 INFO L93 Difference]: Finished difference Result 157 states and 202 transitions. [2022-04-06 19:56:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 19:56:37,486 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 48 states have internal predecessors, (97), 46 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) Word has length 275 [2022-04-06 19:56:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:37,487 INFO L225 Difference]: With dead ends: 157 [2022-04-06 19:56:37,487 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 19:56:37,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 462 SyntacticMatches, 44 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10215 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=11155, Invalid=89017, Unknown=0, NotChecked=0, Total=100172 [2022-04-06 19:56:37,491 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 100 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 15941 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 16179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 15941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:37,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 449 Invalid, 16179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 15941 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 19:56:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 19:56:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2022-04-06 19:56:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 48 states have call successors, (48), 4 states have call predecessors, (48), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 19:56:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 194 transitions. [2022-04-06 19:56:37,524 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 194 transitions. Word has length 275 [2022-04-06 19:56:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:37,524 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 194 transitions. [2022-04-06 19:56:37,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 48 states have internal predecessors, (97), 46 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-06 19:56:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 194 transitions. [2022-04-06 19:56:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-04-06 19:56:37,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:37,525 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:37,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 19:56:37,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 19:56:37,742 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:37,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1122585772, now seen corresponding path program 89 times [2022-04-06 19:56:37,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:37,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1908286263] [2022-04-06 19:56:37,750 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:56:37,750 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1122585772, now seen corresponding path program 90 times [2022-04-06 19:56:37,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:37,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914709360] [2022-04-06 19:56:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:37,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:56:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:56:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:56:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:56:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:56:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:56:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:56:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:56:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:56:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:56:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:56:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:56:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:56:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:56:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:56:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:56:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:56:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:56:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:56:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:56:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:56:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:56:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:56:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:56:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:56:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:56:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:56:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:56:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:56:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:56:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:56:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:56:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:56:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:56:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:56:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:56:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:56:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:56:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-06 19:56:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-06 19:56:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-04-06 19:56:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-04-06 19:56:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-04-06 19:56:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-04-06 19:56:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2022-04-06 19:56:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2022-04-06 19:56:40,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:40,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914709360] [2022-04-06 19:56:40,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914709360] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:40,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835325576] [2022-04-06 19:56:40,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:56:40,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:40,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:40,073 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:56:40,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 19:57:04,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-04-06 19:57:04,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:57:04,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 459 conjunts are in the unsatisfiable core [2022-04-06 19:57:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:57:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2022-04-06 19:57:07,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:57:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-04-06 19:57:31,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835325576] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:57:31,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:57:31,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 141] total 235 [2022-04-06 19:57:31,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:57:31,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1908286263] [2022-04-06 19:57:31,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1908286263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:57:31,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:57:31,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 19:57:31,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996482797] [2022-04-06 19:57:31,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:57:31,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 19:57:31,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:31,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 19:57:31,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4791, Invalid=50199, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 19:57:31,757 INFO L87 Difference]: Start difference. First operand 150 states and 194 transitions. Second operand has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 49 states have internal predecessors, (99), 47 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 19:57:43,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:57:43,229 INFO L93 Difference]: Finished difference Result 160 states and 206 transitions. [2022-04-06 19:57:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 19:57:43,229 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 49 states have internal predecessors, (99), 47 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Word has length 281 [2022-04-06 19:57:43,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:57:43,230 INFO L225 Difference]: With dead ends: 160 [2022-04-06 19:57:43,230 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 19:57:43,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 469 SyntacticMatches, 45 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10678 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=11685, Invalid=94917, Unknown=0, NotChecked=0, Total=106602 [2022-04-06 19:57:43,234 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 102 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 17036 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 17272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 17036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:57:43,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 495 Invalid, 17272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 17036 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 19:57:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 19:57:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2022-04-06 19:57:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 49 states have call successors, (49), 4 states have call predecessors, (49), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-04-06 19:57:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-04-06 19:57:43,303 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 281 [2022-04-06 19:57:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:57:43,304 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-04-06 19:57:43,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 49 states have internal predecessors, (99), 47 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 19:57:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-04-06 19:57:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-04-06 19:57:43,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:57:43,305 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:57:43,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 19:57:43,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 19:57:43,514 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:57:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:57:43,514 INFO L85 PathProgramCache]: Analyzing trace with hash -286319990, now seen corresponding path program 91 times [2022-04-06 19:57:43,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:43,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1346050293] [2022-04-06 19:57:43,516 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:57:43,516 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:57:43,516 INFO L85 PathProgramCache]: Analyzing trace with hash -286319990, now seen corresponding path program 92 times [2022-04-06 19:57:43,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:57:43,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694551140] [2022-04-06 19:57:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:57:43,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:57:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:57:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:57:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:57:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:57:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:57:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:57:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:57:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:57:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:57:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:57:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:57:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:57:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:57:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:57:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:57:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:57:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:57:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:57:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:57:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:57:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:57:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:57:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:57:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:57:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:57:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:57:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:57:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:57:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:57:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:57:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:57:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:57:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:57:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:57:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:57:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:57:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:57:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:57:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:57:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-06 19:57:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-06 19:57:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-04-06 19:57:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-04-06 19:57:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-04-06 19:57:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-04-06 19:57:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2022-04-06 19:57:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2022-04-06 19:57:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6256 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3105 trivial. 0 not checked. [2022-04-06 19:57:46,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:57:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694551140] [2022-04-06 19:57:46,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694551140] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:57:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053258735] [2022-04-06 19:57:46,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:57:46,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:57:46,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:57:46,722 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:57:46,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 19:57:46,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:57:46,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:57:46,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 463 conjunts are in the unsatisfiable core [2022-04-06 19:57:46,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:57:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6256 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3105 trivial. 0 not checked. [2022-04-06 19:57:50,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:58:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6256 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-04-06 19:58:08,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053258735] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:58:08,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:58:08,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 141] total 237 [2022-04-06 19:58:08,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:58:08,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1346050293] [2022-04-06 19:58:08,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1346050293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:58:08,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:58:08,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 19:58:08,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211551979] [2022-04-06 19:58:08,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:58:08,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 19:58:08,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:08,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 19:58:08,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4936, Invalid=50996, Unknown=0, NotChecked=0, Total=55932 [2022-04-06 19:58:08,132 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 50 states have internal predecessors, (101), 48 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-04-06 19:58:19,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:58:19,622 INFO L93 Difference]: Finished difference Result 163 states and 210 transitions. [2022-04-06 19:58:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 19:58:19,623 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 50 states have internal predecessors, (101), 48 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) Word has length 287 [2022-04-06 19:58:19,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:58:19,624 INFO L225 Difference]: With dead ends: 163 [2022-04-06 19:58:19,624 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 19:58:19,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 482 SyntacticMatches, 46 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11139 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=12121, Invalid=97109, Unknown=0, NotChecked=0, Total=109230 [2022-04-06 19:58:19,628 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 104 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 16001 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 16275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 16001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:58:19,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 341 Invalid, 16275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 16001 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 19:58:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 19:58:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2022-04-06 19:58:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 50 states have call successors, (50), 4 states have call predecessors, (50), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-06 19:58:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 202 transitions. [2022-04-06 19:58:19,666 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 202 transitions. Word has length 287 [2022-04-06 19:58:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:58:19,666 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 202 transitions. [2022-04-06 19:58:19,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 50 states have internal predecessors, (101), 48 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-04-06 19:58:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 202 transitions. [2022-04-06 19:58:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-04-06 19:58:19,668 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:58:19,668 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:58:19,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-06 19:58:19,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:58:19,883 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:58:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:58:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash 5147112, now seen corresponding path program 93 times [2022-04-06 19:58:19,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:19,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1974431227] [2022-04-06 19:58:19,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:58:19,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:58:19,885 INFO L85 PathProgramCache]: Analyzing trace with hash 5147112, now seen corresponding path program 94 times [2022-04-06 19:58:19,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:58:19,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913391006] [2022-04-06 19:58:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:58:19,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:58:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:58:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:58:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:58:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:58:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:58:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:58:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:58:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:58:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:58:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:58:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:58:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:58:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:58:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:58:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:58:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:58:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:58:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:58:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:58:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:58:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:58:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:58:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:58:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:58:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:58:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:58:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:58:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:58:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:58:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:58:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:58:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:58:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:58:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:58:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:58:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:58:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:58:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:58:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:58:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-06 19:58:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-06 19:58:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-04-06 19:58:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-04-06 19:58:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-04-06 19:58:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-04-06 19:58:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2022-04-06 19:58:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2022-04-06 19:58:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2022-04-06 19:58:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6533 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-04-06 19:58:23,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:58:23,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913391006] [2022-04-06 19:58:23,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913391006] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:58:23,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726144621] [2022-04-06 19:58:23,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:58:23,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:58:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:58:23,110 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:58:23,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 19:58:23,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:58:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:58:23,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 473 conjunts are in the unsatisfiable core [2022-04-06 19:58:23,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:58:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6533 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-04-06 19:58:26,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:58:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6533 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-04-06 19:58:43,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726144621] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:58:43,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:58:43,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 144] total 242 [2022-04-06 19:58:43,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:58:43,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1974431227] [2022-04-06 19:58:43,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1974431227] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:58:43,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:58:43,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 19:58:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262227728] [2022-04-06 19:58:43,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:58:43,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 19:58:43,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 19:58:43,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5137, Invalid=53185, Unknown=0, NotChecked=0, Total=58322 [2022-04-06 19:58:43,764 INFO L87 Difference]: Start difference. First operand 156 states and 202 transitions. Second operand has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 51 states have internal predecessors, (103), 49 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-06 19:58:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:58:54,248 INFO L93 Difference]: Finished difference Result 166 states and 214 transitions. [2022-04-06 19:58:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 19:58:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 51 states have internal predecessors, (103), 49 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Word has length 293 [2022-04-06 19:58:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:58:54,249 INFO L225 Difference]: With dead ends: 166 [2022-04-06 19:58:54,249 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 19:58:54,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 492 SyntacticMatches, 47 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11616 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=12619, Invalid=101287, Unknown=0, NotChecked=0, Total=113906 [2022-04-06 19:58:54,254 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 106 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 16676 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 16956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 16676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:58:54,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 347 Invalid, 16956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 16676 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 19:58:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 19:58:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-04-06 19:58:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 51 states have call successors, (51), 4 states have call predecessors, (51), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-06 19:58:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 206 transitions. [2022-04-06 19:58:54,307 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 206 transitions. Word has length 293 [2022-04-06 19:58:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:58:54,307 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 206 transitions. [2022-04-06 19:58:54,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 51 states have internal predecessors, (103), 49 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-06 19:58:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 206 transitions. [2022-04-06 19:58:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-04-06 19:58:54,309 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:58:54,309 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:58:54,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 19:58:54,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 19:58:54,522 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:58:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:58:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1901561146, now seen corresponding path program 95 times [2022-04-06 19:58:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:54,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [441336867] [2022-04-06 19:58:54,524 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:58:54,524 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:58:54,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1901561146, now seen corresponding path program 96 times [2022-04-06 19:58:54,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:58:54,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505399801] [2022-04-06 19:58:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:58:54,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:58:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:58:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:58:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:58:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 19:58:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:58:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 19:58:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 19:58:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 19:58:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:58:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 19:58:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 19:58:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 19:58:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:58:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 19:58:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 19:58:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 19:58:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 19:58:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 19:58:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 19:58:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 19:58:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 19:58:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 19:58:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-04-06 19:58:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-04-06 19:58:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-04-06 19:58:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 19:58:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-04-06 19:58:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-04-06 19:58:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-06 19:58:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 19:58:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-06 19:58:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-04-06 19:58:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-04-06 19:58:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 19:58:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-04-06 19:58:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-06 19:58:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-04-06 19:58:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 19:58:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-04-06 19:58:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-04-06 19:58:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-04-06 19:58:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-04-06 19:58:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-04-06 19:58:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-04-06 19:58:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-04-06 19:58:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2022-04-06 19:58:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2022-04-06 19:58:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2022-04-06 19:58:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 289 [2022-04-06 19:58:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6816 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 3384 trivial. 0 not checked. [2022-04-06 19:58:57,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:58:57,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505399801] [2022-04-06 19:58:57,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505399801] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:58:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980586151] [2022-04-06 19:58:57,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:58:57,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:58:57,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:58:57,848 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:58:57,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process