/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:36:43,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:36:43,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:36:43,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:36:43,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:36:43,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:36:43,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:36:43,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:36:43,902 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:36:43,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:36:43,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:36:43,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:36:43,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:36:43,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:36:43,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:36:43,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:36:43,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:36:43,905 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:36:43,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:36:43,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:36:43,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:36:43,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:36:43,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:36:43,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:36:43,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:36:43,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:36:43,907 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:36:43,907 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:36:43,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:36:43,907 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:36:43,907 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:36:44,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:36:44,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:36:44,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:36:44,158 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:36:44,159 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:36:44,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c [2022-04-06 20:36:44,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99d37161e/a6561d16830a43318013c89ff807ff2a/FLAGba91884bd [2022-04-06 20:36:44,617 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:36:44,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de51.c [2022-04-06 20:36:44,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99d37161e/a6561d16830a43318013c89ff807ff2a/FLAGba91884bd [2022-04-06 20:36:45,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99d37161e/a6561d16830a43318013c89ff807ff2a [2022-04-06 20:36:45,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:36:45,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:36:45,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:36:45,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:36:45,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:36:45,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:36:45" (1/1) ... [2022-04-06 20:36:45,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3797b527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45, skipping insertion in model container [2022-04-06 20:36:45,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:36:45" (1/1) ... [2022-04-06 20:36:45,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:36:45,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:36:45,184 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de51.c[368,381] [2022-04-06 20:36:45,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:36:45,206 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:36:45,214 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de51.c[368,381] [2022-04-06 20:36:45,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:36:45,227 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:36:45,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45 WrapperNode [2022-04-06 20:36:45,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:36:45,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:36:45,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:36:45,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:36:45,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45" (1/1) ... [2022-04-06 20:36:45,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45" (1/1) ... [2022-04-06 20:36:45,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45" (1/1) ... [2022-04-06 20:36:45,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45" (1/1) ... [2022-04-06 20:36:45,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45" (1/1) ... [2022-04-06 20:36:45,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45" (1/1) ... [2022-04-06 20:36:45,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45" (1/1) ... [2022-04-06 20:36:45,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:36:45,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:36:45,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:36:45,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:36:45,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45" (1/1) ... [2022-04-06 20:36:45,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:36:45,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:45,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 20:36:45,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 20:36:45,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:36:45,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:36:45,320 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:36:45,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:36:45,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:36:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:36:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:36:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:36:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:36:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 20:36:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:36:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:36:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:36:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:36:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:36:45,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:36:45,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:36:45,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:36:45,376 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:36:45,378 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:36:45,488 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:36:45,492 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:36:45,492 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-04-06 20:36:45,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:36:45 BoogieIcfgContainer [2022-04-06 20:36:45,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:36:45,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:36:45,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:36:45,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:36:45,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:36:45" (1/3) ... [2022-04-06 20:36:45,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3511d1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:36:45, skipping insertion in model container [2022-04-06 20:36:45,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:45" (2/3) ... [2022-04-06 20:36:45,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3511d1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:36:45, skipping insertion in model container [2022-04-06 20:36:45,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:36:45" (3/3) ... [2022-04-06 20:36:45,502 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de51.c [2022-04-06 20:36:45,506 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:36:45,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:36:45,538 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:36:45,544 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 20:36:45,544 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:36:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:36:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:36:45,561 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:45,561 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:45,562 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:45,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:45,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1060076674, now seen corresponding path program 1 times [2022-04-06 20:36:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:45,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1276778710] [2022-04-06 20:36:45,582 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:36:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1060076674, now seen corresponding path program 2 times [2022-04-06 20:36:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:45,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170605131] [2022-04-06 20:36:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:45,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:45,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:45,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:45,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170605131] [2022-04-06 20:36:45,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170605131] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:45,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:45,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:36:45,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:45,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1276778710] [2022-04-06 20:36:45,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1276778710] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:45,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:45,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:36:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974729586] [2022-04-06 20:36:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:45,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:36:45,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:45,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:36:45,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:36:45,862 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:45,899 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2022-04-06 20:36:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:36:45,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 20:36:45,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:45,906 INFO L225 Difference]: With dead ends: 41 [2022-04-06 20:36:45,906 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:36:45,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:36:45,911 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:45,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:36:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:36:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-04-06 20:36:45,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2022-04-06 20:36:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:45,939 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-04-06 20:36:45,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-04-06 20:36:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:36:45,940 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:45,940 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:45,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:36:45,941 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:45,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1174593278, now seen corresponding path program 1 times [2022-04-06 20:36:45,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:45,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1751100577] [2022-04-06 20:36:45,942 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:36:45,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1174593278, now seen corresponding path program 2 times [2022-04-06 20:36:45,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:45,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829407763] [2022-04-06 20:36:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:45,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829407763] [2022-04-06 20:36:46,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829407763] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:46,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:46,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:36:46,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1751100577] [2022-04-06 20:36:46,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1751100577] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:46,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:46,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:36:46,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396339082] [2022-04-06 20:36:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:46,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:36:46,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:36:46,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:36:46,088 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:46,180 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-04-06 20:36:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:36:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 20:36:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:46,181 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:36:46,181 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:36:46,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:36:46,183 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:46,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:36:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 20:36:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-04-06 20:36:46,194 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2022-04-06 20:36:46,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:46,194 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-04-06 20:36:46,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,195 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-04-06 20:36:46,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:36:46,195 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:46,195 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:46,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:36:46,196 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2018158143, now seen corresponding path program 1 times [2022-04-06 20:36:46,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1580893436] [2022-04-06 20:36:46,198 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:46,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2018158143, now seen corresponding path program 2 times [2022-04-06 20:36:46,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:46,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375137056] [2022-04-06 20:36:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:46,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:46,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:46,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375137056] [2022-04-06 20:36:46,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375137056] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:46,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:46,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:36:46,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:46,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1580893436] [2022-04-06 20:36:46,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1580893436] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:46,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:46,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:36:46,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834345672] [2022-04-06 20:36:46,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:46,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:36:46,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:36:46,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:36:46,298 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:46,350 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2022-04-06 20:36:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:36:46,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:36:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:46,351 INFO L225 Difference]: With dead ends: 35 [2022-04-06 20:36:46,351 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:36:46,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:36:46,353 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:46,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 26 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:46,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:36:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 20:36:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-04-06 20:36:46,361 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 17 [2022-04-06 20:36:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:46,362 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-04-06 20:36:46,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-04-06 20:36:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:36:46,363 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:46,363 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:46,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:36:46,368 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:46,369 INFO L85 PathProgramCache]: Analyzing trace with hash -615329744, now seen corresponding path program 1 times [2022-04-06 20:36:46,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1714914118] [2022-04-06 20:36:46,370 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash -615329744, now seen corresponding path program 2 times [2022-04-06 20:36:46,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:46,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106612811] [2022-04-06 20:36:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:46,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:46,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:46,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106612811] [2022-04-06 20:36:46,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106612811] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:46,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:46,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:36:46,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1714914118] [2022-04-06 20:36:46,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1714914118] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:46,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:46,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:36:46,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849197664] [2022-04-06 20:36:46,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:46,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:36:46,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:36:46,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:36:46,451 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:46,514 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2022-04-06 20:36:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:36:46,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:36:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:46,517 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:36:46,517 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 20:36:46,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:36:46,519 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:46,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 25 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 20:36:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-04-06 20:36:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2022-04-06 20:36:46,532 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 17 [2022-04-06 20:36:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:46,533 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2022-04-06 20:36:46,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2022-04-06 20:36:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:36:46,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:46,534 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:46,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:36:46,534 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:46,535 INFO L85 PathProgramCache]: Analyzing trace with hash -578961840, now seen corresponding path program 1 times [2022-04-06 20:36:46,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640306951] [2022-04-06 20:36:46,551 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:46,554 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:46,555 INFO L85 PathProgramCache]: Analyzing trace with hash -578961840, now seen corresponding path program 2 times [2022-04-06 20:36:46,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:46,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119926507] [2022-04-06 20:36:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:46,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:46,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119926507] [2022-04-06 20:36:46,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119926507] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:46,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:46,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:36:46,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:46,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640306951] [2022-04-06 20:36:46,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640306951] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:46,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:46,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:36:46,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907277036] [2022-04-06 20:36:46,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:46,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:36:46,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:36:46,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:36:46,644 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:46,718 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2022-04-06 20:36:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:36:46,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:36:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:46,719 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:36:46,719 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:36:46,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:36:46,721 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:46,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:36:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 20:36:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-04-06 20:36:46,728 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 17 [2022-04-06 20:36:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:46,728 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-04-06 20:36:46,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-04-06 20:36:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:36:46,729 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:46,729 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:46,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 20:36:46,729 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash 388404751, now seen corresponding path program 1 times [2022-04-06 20:36:46,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336665701] [2022-04-06 20:36:46,731 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:46,731 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash 388404751, now seen corresponding path program 2 times [2022-04-06 20:36:46,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:46,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349360412] [2022-04-06 20:36:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:46,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:46,857 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 20:36:46,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:46,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349360412] [2022-04-06 20:36:46,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349360412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:46,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762108400] [2022-04-06 20:36:46,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:46,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:46,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:46,879 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 20:36:46,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:36:46,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:46,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:46,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:36:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:47,063 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 20:36:47,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:47,135 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 20:36:47,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762108400] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:47,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:47,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:36:47,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:47,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336665701] [2022-04-06 20:36:47,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336665701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:47,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:47,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:36:47,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450344330] [2022-04-06 20:36:47,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:47,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:36:47,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:47,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:36:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:36:47,142 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:47,244 INFO L93 Difference]: Finished difference Result 52 states and 75 transitions. [2022-04-06 20:36:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:36:47,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:36:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:47,246 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:36:47,246 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:36:47,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:36:47,250 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:47,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:36:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-04-06 20:36:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-04-06 20:36:47,269 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 17 [2022-04-06 20:36:47,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:47,270 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-04-06 20:36:47,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-04-06 20:36:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:36:47,272 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:47,272 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:47,301 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 20:36:47,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 20:36:47,488 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:47,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:47,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1596703394, now seen corresponding path program 3 times [2022-04-06 20:36:47,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:47,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [45970225] [2022-04-06 20:36:47,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:47,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:47,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1596703394, now seen corresponding path program 4 times [2022-04-06 20:36:47,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:47,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982850698] [2022-04-06 20:36:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:47,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:47,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:47,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:47,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:47,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982850698] [2022-04-06 20:36:47,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982850698] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:47,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335151911] [2022-04-06 20:36:47,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:47,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:47,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:47,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:47,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:36:47,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:47,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:47,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:36:47,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:47,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:47,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335151911] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:47,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:47,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 20:36:47,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:47,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [45970225] [2022-04-06 20:36:47,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [45970225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:47,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:47,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:36:47,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599377217] [2022-04-06 20:36:47,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:47,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:36:47,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:47,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:36:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:36:47,757 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:47,899 INFO L93 Difference]: Finished difference Result 62 states and 90 transitions. [2022-04-06 20:36:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:36:47,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 20:36:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:47,904 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:36:47,904 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 20:36:47,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:36:47,906 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:47,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 48 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 20:36:47,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2022-04-06 20:36:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2022-04-06 20:36:47,920 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 18 [2022-04-06 20:36:47,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:47,920 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2022-04-06 20:36:47,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,920 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2022-04-06 20:36:47,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:36:47,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:47,921 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:47,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:48,144 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,SelfDestructingSolverStorable6 [2022-04-06 20:36:48,145 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash 9935328, now seen corresponding path program 1 times [2022-04-06 20:36:48,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:48,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [567892894] [2022-04-06 20:36:48,147 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:48,147 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:48,147 INFO L85 PathProgramCache]: Analyzing trace with hash 9935328, now seen corresponding path program 2 times [2022-04-06 20:36:48,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:48,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508157761] [2022-04-06 20:36:48,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:48,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:48,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:48,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:48,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508157761] [2022-04-06 20:36:48,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508157761] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:48,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488889194] [2022-04-06 20:36:48,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:48,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:48,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:48,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:48,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:36:48,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:48,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:48,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:36:48,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:48,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:48,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488889194] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:48,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:48,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-04-06 20:36:48,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:48,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [567892894] [2022-04-06 20:36:48,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [567892894] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:48,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:48,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:36:48,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511249877] [2022-04-06 20:36:48,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:48,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:36:48,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:48,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:36:48,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:36:48,385 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:48,569 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2022-04-06 20:36:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:36:48,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 20:36:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:48,570 INFO L225 Difference]: With dead ends: 61 [2022-04-06 20:36:48,570 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 20:36:48,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:36:48,571 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:48,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 38 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 20:36:48,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-04-06 20:36:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2022-04-06 20:36:48,579 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 19 [2022-04-06 20:36:48,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:48,579 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2022-04-06 20:36:48,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2022-04-06 20:36:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:36:48,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:48,580 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:48,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 20:36:48,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:48,797 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash 399255663, now seen corresponding path program 5 times [2022-04-06 20:36:48,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:48,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1884263236] [2022-04-06 20:36:48,799 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:48,799 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash 399255663, now seen corresponding path program 6 times [2022-04-06 20:36:48,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:48,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742622792] [2022-04-06 20:36:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:48,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:48,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742622792] [2022-04-06 20:36:48,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742622792] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624241531] [2022-04-06 20:36:48,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:48,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:48,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:48,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:48,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:36:48,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:36:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:49,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:49,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624241531] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:49,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:49,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 20:36:49,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:49,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1884263236] [2022-04-06 20:36:49,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1884263236] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:49,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:49,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:36:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325536898] [2022-04-06 20:36:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:49,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:36:49,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:36:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:36:49,105 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:49,285 INFO L93 Difference]: Finished difference Result 87 states and 124 transitions. [2022-04-06 20:36:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:36:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 20:36:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:49,286 INFO L225 Difference]: With dead ends: 87 [2022-04-06 20:36:49,286 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 20:36:49,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:36:49,287 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:49,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 60 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 20:36:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2022-04-06 20:36:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2022-04-06 20:36:49,297 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 19 [2022-04-06 20:36:49,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:49,297 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2022-04-06 20:36:49,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2022-04-06 20:36:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:36:49,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:49,298 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:49,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:49,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:49,521 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:49,522 INFO L85 PathProgramCache]: Analyzing trace with hash 342490275, now seen corresponding path program 1 times [2022-04-06 20:36:49,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:49,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [125451278] [2022-04-06 20:36:49,523 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:49,523 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash 342490275, now seen corresponding path program 2 times [2022-04-06 20:36:49,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:49,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774032546] [2022-04-06 20:36:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:49,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:49,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:49,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:49,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774032546] [2022-04-06 20:36:49,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774032546] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:49,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639871159] [2022-04-06 20:36:49,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:49,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:49,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:49,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:49,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:36:49,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:49,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:49,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:36:49,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:49,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:49,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639871159] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:49,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:49,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-04-06 20:36:49,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [125451278] [2022-04-06 20:36:49,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [125451278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:49,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:49,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:36:49,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030143890] [2022-04-06 20:36:49,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:49,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:36:49,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:36:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:36:49,720 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:49,793 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2022-04-06 20:36:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:36:49,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:36:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:49,794 INFO L225 Difference]: With dead ends: 73 [2022-04-06 20:36:49,794 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:36:49,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:36:49,795 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:49,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:36:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-04-06 20:36:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 53 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2022-04-06 20:36:49,814 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 20 [2022-04-06 20:36:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:49,815 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2022-04-06 20:36:49,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2022-04-06 20:36:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:36:49,816 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:49,816 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:49,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:50,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 20:36:50,032 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:50,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1933081666, now seen corresponding path program 7 times [2022-04-06 20:36:50,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:50,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1770388672] [2022-04-06 20:36:50,034 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:50,034 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1933081666, now seen corresponding path program 8 times [2022-04-06 20:36:50,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:50,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685376071] [2022-04-06 20:36:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:50,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:50,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:50,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:50,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685376071] [2022-04-06 20:36:50,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685376071] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:50,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724640100] [2022-04-06 20:36:50,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:50,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:50,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:50,129 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:50,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:36:50,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:50,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:36:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:50,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:50,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724640100] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:50,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:50,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:36:50,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:50,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1770388672] [2022-04-06 20:36:50,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1770388672] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:50,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:50,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:36:50,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986756434] [2022-04-06 20:36:50,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:50,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:36:50,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:50,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:36:50,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:36:50,358 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:50,637 INFO L93 Difference]: Finished difference Result 118 states and 172 transitions. [2022-04-06 20:36:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:36:50,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:36:50,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:50,639 INFO L225 Difference]: With dead ends: 118 [2022-04-06 20:36:50,639 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 20:36:50,640 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:36:50,640 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 70 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:50,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 72 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:50,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 20:36:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2022-04-06 20:36:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.4) internal successors, (84), 60 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:50,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 88 transitions. [2022-04-06 20:36:50,656 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 88 transitions. Word has length 20 [2022-04-06 20:36:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:50,656 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 88 transitions. [2022-04-06 20:36:50,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 88 transitions. [2022-04-06 20:36:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:36:50,663 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:50,663 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:50,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:50,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:50,879 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:50,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1695200847, now seen corresponding path program 1 times [2022-04-06 20:36:50,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:50,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [197678958] [2022-04-06 20:36:50,881 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:50,881 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1695200847, now seen corresponding path program 2 times [2022-04-06 20:36:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:50,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99104148] [2022-04-06 20:36:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:50,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:51,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:51,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:51,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99104148] [2022-04-06 20:36:51,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99104148] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:51,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172148799] [2022-04-06 20:36:51,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:51,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:51,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:51,042 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:51,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:36:51,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:51,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:51,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:36:51,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:51,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:51,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172148799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:51,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:51,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 13 [2022-04-06 20:36:51,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:51,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [197678958] [2022-04-06 20:36:51,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [197678958] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:51,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:51,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:36:51,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483937554] [2022-04-06 20:36:51,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:51,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:36:51,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:36:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:36:51,293 INFO L87 Difference]: Start difference. First operand 65 states and 88 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:51,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:51,527 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-04-06 20:36:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:36:51,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 20:36:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:51,528 INFO L225 Difference]: With dead ends: 77 [2022-04-06 20:36:51,528 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 20:36:51,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:36:51,529 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:51,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 36 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 20:36:51,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-06 20:36:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 52 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2022-04-06 20:36:51,542 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 21 [2022-04-06 20:36:51,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:51,542 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2022-04-06 20:36:51,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:51,543 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2022-04-06 20:36:51,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:36:51,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:51,545 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:51,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:51,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:51,768 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2057919793, now seen corresponding path program 9 times [2022-04-06 20:36:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:51,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583824624] [2022-04-06 20:36:51,770 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:51,770 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:51,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2057919793, now seen corresponding path program 10 times [2022-04-06 20:36:51,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:51,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219040746] [2022-04-06 20:36:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:51,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:51,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:51,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219040746] [2022-04-06 20:36:51,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219040746] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:51,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817388133] [2022-04-06 20:36:51,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:51,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:51,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:51,880 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:51,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:36:51,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:51,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:51,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:36:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:51,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:52,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817388133] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:52,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:52,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:36:52,115 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:52,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583824624] [2022-04-06 20:36:52,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583824624] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:52,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:52,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:36:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102956844] [2022-04-06 20:36:52,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:52,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:36:52,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:36:52,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:36:52,116 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:52,423 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2022-04-06 20:36:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:36:52,424 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 20:36:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:52,424 INFO L225 Difference]: With dead ends: 110 [2022-04-06 20:36:52,424 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 20:36:52,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:36:52,425 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 73 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:52,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 81 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 20:36:52,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2022-04-06 20:36:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2022-04-06 20:36:52,437 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 21 [2022-04-06 20:36:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:52,437 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2022-04-06 20:36:52,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2022-04-06 20:36:52,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:36:52,438 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:52,438 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:52,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 20:36:52,661 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,SelfDestructingSolverStorable12 [2022-04-06 20:36:52,661 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:52,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:52,661 INFO L85 PathProgramCache]: Analyzing trace with hash 38994402, now seen corresponding path program 1 times [2022-04-06 20:36:52,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:52,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [236328882] [2022-04-06 20:36:52,663 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:52,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:52,663 INFO L85 PathProgramCache]: Analyzing trace with hash 38994402, now seen corresponding path program 2 times [2022-04-06 20:36:52,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:52,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924055345] [2022-04-06 20:36:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:52,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:52,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:36:52,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:52,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924055345] [2022-04-06 20:36:52,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924055345] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:52,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146356631] [2022-04-06 20:36:52,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:52,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:52,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:52,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:52,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:36:52,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:52,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:36:52,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:36:52,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:36:52,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146356631] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:52,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:52,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-04-06 20:36:52,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:52,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [236328882] [2022-04-06 20:36:52,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [236328882] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:52,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:52,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:36:52,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11282226] [2022-04-06 20:36:52,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:52,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:36:52,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:52,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:36:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:36:52,948 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:53,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:53,111 INFO L93 Difference]: Finished difference Result 87 states and 118 transitions. [2022-04-06 20:36:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:36:53,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 20:36:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:53,112 INFO L225 Difference]: With dead ends: 87 [2022-04-06 20:36:53,112 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 20:36:53,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:36:53,113 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:53,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 20:36:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2022-04-06 20:36:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2022-04-06 20:36:53,126 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 22 [2022-04-06 20:36:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:53,126 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2022-04-06 20:36:53,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:53,126 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2022-04-06 20:36:53,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:36:53,126 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:53,127 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:53,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:53,349 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:36:53,349 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash -462225342, now seen corresponding path program 3 times [2022-04-06 20:36:53,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:53,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [77815782] [2022-04-06 20:36:53,351 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:53,351 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:53,351 INFO L85 PathProgramCache]: Analyzing trace with hash -462225342, now seen corresponding path program 4 times [2022-04-06 20:36:53,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:53,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422604015] [2022-04-06 20:36:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:53,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:53,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:53,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:53,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422604015] [2022-04-06 20:36:53,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422604015] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:53,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677368203] [2022-04-06 20:36:53,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:53,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:53,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:53,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:53,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:36:53,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:53,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:53,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:36:53,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:53,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:53,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677368203] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:53,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:53,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-04-06 20:36:53,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:53,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [77815782] [2022-04-06 20:36:53,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [77815782] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:53,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:53,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:36:53,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978498641] [2022-04-06 20:36:53,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:53,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:36:53,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:53,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:36:53,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:36:53,612 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:53,969 INFO L93 Difference]: Finished difference Result 98 states and 139 transitions. [2022-04-06 20:36:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:36:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 20:36:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:53,970 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:36:53,970 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 20:36:53,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:36:53,971 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:53,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 20:36:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2022-04-06 20:36:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 65 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2022-04-06 20:36:53,985 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 22 [2022-04-06 20:36:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:53,986 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2022-04-06 20:36:53,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2022-04-06 20:36:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:36:53,987 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:53,987 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:54,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:54,207 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,SelfDestructingSolverStorable14 [2022-04-06 20:36:54,208 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:54,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1224913438, now seen corresponding path program 11 times [2022-04-06 20:36:54,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [400433339] [2022-04-06 20:36:54,209 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:54,209 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:54,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1224913438, now seen corresponding path program 12 times [2022-04-06 20:36:54,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:54,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651754858] [2022-04-06 20:36:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:54,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:54,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:54,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651754858] [2022-04-06 20:36:54,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651754858] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775899440] [2022-04-06 20:36:54,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:54,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:54,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:54,316 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:54,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:36:54,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:36:54,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:54,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:36:54,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:54,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:54,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775899440] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:54,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:54,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 20:36:54,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:54,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [400433339] [2022-04-06 20:36:54,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [400433339] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:54,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:54,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:36:54,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293469323] [2022-04-06 20:36:54,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:54,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:36:54,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:36:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:36:54,589 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:55,001 INFO L93 Difference]: Finished difference Result 156 states and 224 transitions. [2022-04-06 20:36:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:36:55,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 20:36:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:55,002 INFO L225 Difference]: With dead ends: 156 [2022-04-06 20:36:55,002 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 20:36:55,003 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:36:55,003 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 82 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:55,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 95 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:55,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 20:36:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2022-04-06 20:36:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.375) internal successors, (99), 72 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2022-04-06 20:36:55,018 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 22 [2022-04-06 20:36:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:55,018 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2022-04-06 20:36:55,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2022-04-06 20:36:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:36:55,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:55,019 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:55,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:55,241 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,SelfDestructingSolverStorable15 [2022-04-06 20:36:55,242 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:55,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:55,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1171520209, now seen corresponding path program 13 times [2022-04-06 20:36:55,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:55,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [197811009] [2022-04-06 20:36:55,243 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:55,243 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1171520209, now seen corresponding path program 14 times [2022-04-06 20:36:55,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:55,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711030704] [2022-04-06 20:36:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:55,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:55,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:55,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:55,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711030704] [2022-04-06 20:36:55,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711030704] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:55,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274121709] [2022-04-06 20:36:55,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:55,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:55,374 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:55,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:36:55,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:55,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:36:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:55,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:55,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274121709] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:55,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:55,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:36:55,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:55,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [197811009] [2022-04-06 20:36:55,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [197811009] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:55,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:55,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:36:55,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255749360] [2022-04-06 20:36:55,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:55,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:36:55,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:55,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:36:55,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:36:55,721 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:56,216 INFO L93 Difference]: Finished difference Result 172 states and 248 transitions. [2022-04-06 20:36:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:36:56,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:36:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:56,218 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:36:56,218 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 20:36:56,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:36:56,219 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 97 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:56,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 105 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:36:56,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 20:36:56,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2022-04-06 20:36:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 113 transitions. [2022-04-06 20:36:56,230 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 113 transitions. Word has length 23 [2022-04-06 20:36:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:56,230 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 113 transitions. [2022-04-06 20:36:56,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,230 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 113 transitions. [2022-04-06 20:36:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:36:56,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:56,230 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:56,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 20:36:56,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 20:36:56,436 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:56,437 INFO L85 PathProgramCache]: Analyzing trace with hash -713078750, now seen corresponding path program 3 times [2022-04-06 20:36:56,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:56,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1040470738] [2022-04-06 20:36:56,438 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:56,438 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:56,438 INFO L85 PathProgramCache]: Analyzing trace with hash -713078750, now seen corresponding path program 4 times [2022-04-06 20:36:56,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:56,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478170420] [2022-04-06 20:36:56,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:56,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:56,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:56,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478170420] [2022-04-06 20:36:56,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478170420] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816382916] [2022-04-06 20:36:56,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:56,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:56,527 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:56,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:36:56,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:56,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:56,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:36:56,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:56,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:56,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816382916] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:56,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:56,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2022-04-06 20:36:56,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:56,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1040470738] [2022-04-06 20:36:56,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1040470738] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:56,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:56,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:36:56,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182941600] [2022-04-06 20:36:56,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:56,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:36:56,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:56,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:36:56,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:36:56,695 INFO L87 Difference]: Start difference. First operand 84 states and 113 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:56,844 INFO L93 Difference]: Finished difference Result 126 states and 176 transitions. [2022-04-06 20:36:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:36:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:36:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:56,845 INFO L225 Difference]: With dead ends: 126 [2022-04-06 20:36:56,845 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 20:36:56,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:36:56,846 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:56,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 43 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:56,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 20:36:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2022-04-06 20:36:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.3838383838383839) internal successors, (137), 99 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2022-04-06 20:36:56,879 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 24 [2022-04-06 20:36:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:56,879 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2022-04-06 20:36:56,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2022-04-06 20:36:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:36:56,880 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:56,880 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:56,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:57,095 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,SelfDestructingSolverStorable17 [2022-04-06 20:36:57,095 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:57,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash -495266734, now seen corresponding path program 3 times [2022-04-06 20:36:57,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:57,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1655893962] [2022-04-06 20:36:57,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:57,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:57,097 INFO L85 PathProgramCache]: Analyzing trace with hash -495266734, now seen corresponding path program 4 times [2022-04-06 20:36:57,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:57,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005547919] [2022-04-06 20:36:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:57,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:57,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:36:57,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005547919] [2022-04-06 20:36:57,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005547919] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780713182] [2022-04-06 20:36:57,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:57,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:57,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:57,192 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:57,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:36:57,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:57,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:36:57,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:36:57,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:36:57,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780713182] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:57,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:57,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 15 [2022-04-06 20:36:57,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:57,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1655893962] [2022-04-06 20:36:57,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1655893962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:57,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:57,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:36:57,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567663286] [2022-04-06 20:36:57,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:57,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:36:57,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:57,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:36:57,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:36:57,409 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:57,631 INFO L93 Difference]: Finished difference Result 146 states and 194 transitions. [2022-04-06 20:36:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:36:57,631 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:36:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:57,632 INFO L225 Difference]: With dead ends: 146 [2022-04-06 20:36:57,632 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 20:36:57,632 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:36:57,633 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:57,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 58 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 20:36:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2022-04-06 20:36:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 99 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 140 transitions. [2022-04-06 20:36:57,655 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 140 transitions. Word has length 24 [2022-04-06 20:36:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:57,655 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 140 transitions. [2022-04-06 20:36:57,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 140 transitions. [2022-04-06 20:36:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:36:57,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:57,656 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:57,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 20:36:57,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:57,867 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash 483669890, now seen corresponding path program 15 times [2022-04-06 20:36:57,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:57,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [48403263] [2022-04-06 20:36:57,869 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:57,869 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:57,869 INFO L85 PathProgramCache]: Analyzing trace with hash 483669890, now seen corresponding path program 16 times [2022-04-06 20:36:57,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:57,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883357354] [2022-04-06 20:36:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:57,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:57,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:58,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:58,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883357354] [2022-04-06 20:36:58,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883357354] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:58,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163717625] [2022-04-06 20:36:58,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:58,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:58,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:58,004 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:58,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:36:58,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:58,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:58,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:36:58,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:58,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:58,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163717625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:58,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:58,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:36:58,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:58,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [48403263] [2022-04-06 20:36:58,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [48403263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:58,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:58,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:36:58,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648995770] [2022-04-06 20:36:58,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:58,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:36:58,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:58,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:36:58,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:36:58,324 INFO L87 Difference]: Start difference. First operand 104 states and 140 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:58,948 INFO L93 Difference]: Finished difference Result 215 states and 315 transitions. [2022-04-06 20:36:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:36:58,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:36:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:58,949 INFO L225 Difference]: With dead ends: 215 [2022-04-06 20:36:58,949 INFO L226 Difference]: Without dead ends: 195 [2022-04-06 20:36:58,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:36:58,950 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 108 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:58,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 117 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:36:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-04-06 20:36:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 113. [2022-04-06 20:36:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.3796296296296295) internal successors, (149), 108 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2022-04-06 20:36:58,973 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 24 [2022-04-06 20:36:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:58,973 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2022-04-06 20:36:58,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2022-04-06 20:36:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:36:58,974 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:58,974 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:58,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:59,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:59,187 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:59,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1115860192, now seen corresponding path program 5 times [2022-04-06 20:36:59,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:59,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1572429865] [2022-04-06 20:36:59,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:59,189 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:59,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1115860192, now seen corresponding path program 6 times [2022-04-06 20:36:59,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:59,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668860735] [2022-04-06 20:36:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:59,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:59,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:59,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:59,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668860735] [2022-04-06 20:36:59,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668860735] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:59,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833232648] [2022-04-06 20:36:59,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:59,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:59,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:59,320 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:59,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:36:59,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:59,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:59,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:36:59,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:59,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:59,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833232648] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:59,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:59,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-04-06 20:36:59,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:59,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1572429865] [2022-04-06 20:36:59,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1572429865] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:59,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:59,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:36:59,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935173522] [2022-04-06 20:36:59,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:59,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:36:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:36:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:36:59,488 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:00,081 INFO L93 Difference]: Finished difference Result 174 states and 243 transitions. [2022-04-06 20:37:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:37:00,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:37:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:00,082 INFO L225 Difference]: With dead ends: 174 [2022-04-06 20:37:00,082 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 20:37:00,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:37:00,084 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:00,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 70 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 20:37:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 119. [2022-04-06 20:37:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.3508771929824561) internal successors, (154), 114 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2022-04-06 20:37:00,106 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 25 [2022-04-06 20:37:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:00,106 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2022-04-06 20:37:00,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2022-04-06 20:37:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:37:00,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:00,107 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:00,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:00,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:00,310 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:00,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:00,310 INFO L85 PathProgramCache]: Analyzing trace with hash 254955407, now seen corresponding path program 17 times [2022-04-06 20:37:00,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:00,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [605948318] [2022-04-06 20:37:00,311 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:00,311 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:00,311 INFO L85 PathProgramCache]: Analyzing trace with hash 254955407, now seen corresponding path program 18 times [2022-04-06 20:37:00,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:00,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972210328] [2022-04-06 20:37:00,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:00,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:00,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972210328] [2022-04-06 20:37:00,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972210328] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696791165] [2022-04-06 20:37:00,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:00,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:00,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:00,462 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:00,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:37:00,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:37:00,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:00,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:37:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:00,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:00,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696791165] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:00,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:00,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:37:00,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:00,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [605948318] [2022-04-06 20:37:00,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [605948318] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:00,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:00,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:00,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245530259] [2022-04-06 20:37:00,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:00,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:00,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:00,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:00,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:37:00,803 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:01,478 INFO L93 Difference]: Finished difference Result 266 states and 385 transitions. [2022-04-06 20:37:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:37:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:37:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:01,481 INFO L225 Difference]: With dead ends: 266 [2022-04-06 20:37:01,481 INFO L226 Difference]: Without dead ends: 246 [2022-04-06 20:37:01,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=1025, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:37:01,482 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 123 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:01,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 129 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:37:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-04-06 20:37:01,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 128. [2022-04-06 20:37:01,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.3577235772357723) internal successors, (167), 123 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 171 transitions. [2022-04-06 20:37:01,503 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 171 transitions. Word has length 25 [2022-04-06 20:37:01,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:01,503 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 171 transitions. [2022-04-06 20:37:01,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:01,503 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 171 transitions. [2022-04-06 20:37:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:37:01,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:01,504 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:01,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:01,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:01,706 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash -137630238, now seen corresponding path program 3 times [2022-04-06 20:37:01,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:01,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1024618967] [2022-04-06 20:37:01,708 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:01,708 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash -137630238, now seen corresponding path program 4 times [2022-04-06 20:37:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:01,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82564782] [2022-04-06 20:37:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:01,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:37:01,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:01,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82564782] [2022-04-06 20:37:01,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82564782] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:01,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008974299] [2022-04-06 20:37:01,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:01,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:01,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:01,924 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:01,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:37:01,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:01,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:01,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:37:01,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:37:02,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:37:02,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008974299] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:02,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:02,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2022-04-06 20:37:02,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:02,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1024618967] [2022-04-06 20:37:02,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1024618967] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:02,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:02,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:37:02,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326854937] [2022-04-06 20:37:02,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:02,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:37:02,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:02,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:37:02,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:37:02,285 INFO L87 Difference]: Start difference. First operand 128 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:02,511 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2022-04-06 20:37:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:37:02,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 20:37:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:02,512 INFO L225 Difference]: With dead ends: 143 [2022-04-06 20:37:02,512 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 20:37:02,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:37:02,513 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:02,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 20:37:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-04-06 20:37:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.3716814159292035) internal successors, (155), 113 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2022-04-06 20:37:02,540 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 26 [2022-04-06 20:37:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:02,540 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2022-04-06 20:37:02,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2022-04-06 20:37:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:37:02,540 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:02,540 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:02,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:02,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:02,755 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:02,756 INFO L85 PathProgramCache]: Analyzing trace with hash -32897246, now seen corresponding path program 5 times [2022-04-06 20:37:02,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:02,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2075152493] [2022-04-06 20:37:02,757 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:02,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:02,757 INFO L85 PathProgramCache]: Analyzing trace with hash -32897246, now seen corresponding path program 6 times [2022-04-06 20:37:02,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:02,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393129451] [2022-04-06 20:37:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:02,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:02,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:37:02,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393129451] [2022-04-06 20:37:02,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393129451] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121952200] [2022-04-06 20:37:02,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:02,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:02,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:02,849 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:02,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:37:02,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:37:02,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:37:02,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 20:37:03,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121952200] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:03,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:03,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 16 [2022-04-06 20:37:03,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:03,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2075152493] [2022-04-06 20:37:03,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2075152493] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:03,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:03,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:37:03,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44590982] [2022-04-06 20:37:03,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:03,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:37:03,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:03,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:37:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:37:03,040 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:03,350 INFO L93 Difference]: Finished difference Result 183 states and 240 transitions. [2022-04-06 20:37:03,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:37:03,350 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 20:37:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:03,351 INFO L225 Difference]: With dead ends: 183 [2022-04-06 20:37:03,351 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 20:37:03,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:37:03,352 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:03,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 72 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 20:37:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 118. [2022-04-06 20:37:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.3628318584070795) internal successors, (154), 113 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 158 transitions. [2022-04-06 20:37:03,378 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 158 transitions. Word has length 26 [2022-04-06 20:37:03,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:03,378 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 158 transitions. [2022-04-06 20:37:03,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 158 transitions. [2022-04-06 20:37:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:37:03,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:03,379 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:03,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:03,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:03,595 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1754741026, now seen corresponding path program 19 times [2022-04-06 20:37:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:03,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2028307099] [2022-04-06 20:37:03,596 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:03,596 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1754741026, now seen corresponding path program 20 times [2022-04-06 20:37:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:03,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955364815] [2022-04-06 20:37:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:03,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:03,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:03,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:03,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955364815] [2022-04-06 20:37:03,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955364815] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:03,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947938173] [2022-04-06 20:37:03,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:03,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:03,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:03,741 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:03,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:37:03,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:03,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:03,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:37:03,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:03,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:04,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947938173] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:04,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:04,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:37:04,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2028307099] [2022-04-06 20:37:04,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2028307099] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:04,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:04,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:37:04,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181516933] [2022-04-06 20:37:04,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:04,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:37:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:04,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:37:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:04,100 INFO L87 Difference]: Start difference. First operand 118 states and 158 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:04,822 INFO L93 Difference]: Finished difference Result 268 states and 386 transitions. [2022-04-06 20:37:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:37:04,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 20:37:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:04,823 INFO L225 Difference]: With dead ends: 268 [2022-04-06 20:37:04,823 INFO L226 Difference]: Without dead ends: 248 [2022-04-06 20:37:04,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=358, Invalid=1202, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:37:04,824 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 121 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:04,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 138 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:37:04,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-04-06 20:37:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 127. [2022-04-06 20:37:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.3688524590163935) internal successors, (167), 122 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 171 transitions. [2022-04-06 20:37:04,852 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 171 transitions. Word has length 26 [2022-04-06 20:37:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:04,852 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 171 transitions. [2022-04-06 20:37:04,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 171 transitions. [2022-04-06 20:37:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:37:04,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:04,853 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:04,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-06 20:37:05,076 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,SelfDestructingSolverStorable24 [2022-04-06 20:37:05,076 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash 992117264, now seen corresponding path program 7 times [2022-04-06 20:37:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:05,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846433351] [2022-04-06 20:37:05,077 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:05,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:05,078 INFO L85 PathProgramCache]: Analyzing trace with hash 992117264, now seen corresponding path program 8 times [2022-04-06 20:37:05,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:05,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246009390] [2022-04-06 20:37:05,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:05,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:05,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:37:05,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:05,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246009390] [2022-04-06 20:37:05,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246009390] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:05,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291598455] [2022-04-06 20:37:05,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:05,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:05,192 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:05,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:37:05,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:05,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:05,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:05,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:37:05,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:37:05,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291598455] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:05,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:05,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-04-06 20:37:05,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:05,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846433351] [2022-04-06 20:37:05,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846433351] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:05,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:05,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:37:05,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990801265] [2022-04-06 20:37:05,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:05,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:37:05,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:05,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:37:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:37:05,351 INFO L87 Difference]: Start difference. First operand 127 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:05,694 INFO L93 Difference]: Finished difference Result 192 states and 253 transitions. [2022-04-06 20:37:05,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:37:05,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:37:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:05,695 INFO L225 Difference]: With dead ends: 192 [2022-04-06 20:37:05,695 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 20:37:05,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:05,697 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:05,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 72 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 20:37:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 128. [2022-04-06 20:37:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.3577235772357723) internal successors, (167), 123 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 171 transitions. [2022-04-06 20:37:05,721 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 171 transitions. Word has length 27 [2022-04-06 20:37:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:05,721 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 171 transitions. [2022-04-06 20:37:05,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 171 transitions. [2022-04-06 20:37:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:37:05,722 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:05,722 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:05,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:05,923 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,SelfDestructingSolverStorable25 [2022-04-06 20:37:05,923 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:05,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1003454959, now seen corresponding path program 21 times [2022-04-06 20:37:05,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:05,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [556442310] [2022-04-06 20:37:05,924 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:05,924 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:05,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1003454959, now seen corresponding path program 22 times [2022-04-06 20:37:05,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:05,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781390977] [2022-04-06 20:37:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:05,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:06,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:06,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:06,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781390977] [2022-04-06 20:37:06,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781390977] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:06,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430261262] [2022-04-06 20:37:06,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:06,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:06,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:06,100 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:06,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:37:06,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:06,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:06,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:37:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:06,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:06,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430261262] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:06,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:06,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:37:06,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:06,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [556442310] [2022-04-06 20:37:06,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [556442310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:06,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:06,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:06,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777545288] [2022-04-06 20:37:06,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:06,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:06,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:06,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:06,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:37:06,537 INFO L87 Difference]: Start difference. First operand 128 states and 171 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:07,375 INFO L93 Difference]: Finished difference Result 289 states and 416 transitions. [2022-04-06 20:37:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:37:07,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:37:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:07,377 INFO L225 Difference]: With dead ends: 289 [2022-04-06 20:37:07,377 INFO L226 Difference]: Without dead ends: 269 [2022-04-06 20:37:07,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=413, Invalid=1393, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:37:07,378 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 135 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:07,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 150 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:37:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-04-06 20:37:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 137. [2022-04-06 20:37:07,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.3636363636363635) internal successors, (180), 132 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 184 transitions. [2022-04-06 20:37:07,413 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 184 transitions. Word has length 27 [2022-04-06 20:37:07,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:07,413 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 184 transitions. [2022-04-06 20:37:07,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 184 transitions. [2022-04-06 20:37:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:37:07,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:07,414 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:07,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:07,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:37:07,616 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:07,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash 349794051, now seen corresponding path program 5 times [2022-04-06 20:37:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:07,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [328512071] [2022-04-06 20:37:07,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:07,617 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash 349794051, now seen corresponding path program 6 times [2022-04-06 20:37:07,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:07,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546179067] [2022-04-06 20:37:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:07,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:07,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:37:07,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:07,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546179067] [2022-04-06 20:37:07,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546179067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:07,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655973819] [2022-04-06 20:37:07,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:07,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:07,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:07,695 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:07,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:37:07,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:07,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:07,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:37:07,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:37:07,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:37:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655973819] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:07,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:07,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2022-04-06 20:37:07,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [328512071] [2022-04-06 20:37:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [328512071] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:07,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:07,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:37:07,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415562808] [2022-04-06 20:37:07,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:07,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:37:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:37:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:37:07,885 INFO L87 Difference]: Start difference. First operand 137 states and 184 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:08,154 INFO L93 Difference]: Finished difference Result 193 states and 269 transitions. [2022-04-06 20:37:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:37:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:37:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:08,156 INFO L225 Difference]: With dead ends: 193 [2022-04-06 20:37:08,156 INFO L226 Difference]: Without dead ends: 183 [2022-04-06 20:37:08,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:37:08,157 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:08,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 43 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-06 20:37:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 164. [2022-04-06 20:37:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.3647798742138364) internal successors, (217), 159 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 221 transitions. [2022-04-06 20:37:08,198 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 221 transitions. Word has length 28 [2022-04-06 20:37:08,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:08,198 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 221 transitions. [2022-04-06 20:37:08,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:08,198 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 221 transitions. [2022-04-06 20:37:08,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:37:08,199 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:08,199 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:08,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:08,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:08,422 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:08,422 INFO L85 PathProgramCache]: Analyzing trace with hash 401313666, now seen corresponding path program 9 times [2022-04-06 20:37:08,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:08,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834229206] [2022-04-06 20:37:08,423 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:08,423 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:08,423 INFO L85 PathProgramCache]: Analyzing trace with hash 401313666, now seen corresponding path program 10 times [2022-04-06 20:37:08,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:08,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329668913] [2022-04-06 20:37:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:08,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:08,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:08,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:08,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329668913] [2022-04-06 20:37:08,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329668913] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:08,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626563574] [2022-04-06 20:37:08,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:08,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:08,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:08,597 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:08,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:37:08,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:08,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:08,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:37:08,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:37:08,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:37:08,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626563574] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:08,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:08,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-04-06 20:37:08,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:08,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834229206] [2022-04-06 20:37:08,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834229206] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:08,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:08,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:08,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457829619] [2022-04-06 20:37:08,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:08,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:08,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:08,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:08,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:37:08,836 INFO L87 Difference]: Start difference. First operand 164 states and 221 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:09,646 INFO L93 Difference]: Finished difference Result 235 states and 332 transitions. [2022-04-06 20:37:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:37:09,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:37:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:09,647 INFO L225 Difference]: With dead ends: 235 [2022-04-06 20:37:09,647 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 20:37:09,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:37:09,648 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:09,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 77 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 20:37:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 171. [2022-04-06 20:37:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.3493975903614457) internal successors, (224), 166 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 228 transitions. [2022-04-06 20:37:09,693 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 228 transitions. Word has length 28 [2022-04-06 20:37:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:09,693 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 228 transitions. [2022-04-06 20:37:09,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 228 transitions. [2022-04-06 20:37:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:37:09,694 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:09,694 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:09,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 20:37:09,902 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,SelfDestructingSolverStorable28 [2022-04-06 20:37:09,902 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:09,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1899162222, now seen corresponding path program 7 times [2022-04-06 20:37:09,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:09,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [76470469] [2022-04-06 20:37:09,903 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:09,904 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:09,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1899162222, now seen corresponding path program 8 times [2022-04-06 20:37:09,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:09,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014310673] [2022-04-06 20:37:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:09,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:37:09,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014310673] [2022-04-06 20:37:09,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014310673] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097290716] [2022-04-06 20:37:09,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:09,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:10,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:10,008 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:10,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:37:10,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:10,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:10,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:37:10,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:37:10,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:37:10,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097290716] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:10,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:10,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 20:37:10,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:10,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [76470469] [2022-04-06 20:37:10,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [76470469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:10,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:10,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:37:10,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058475004] [2022-04-06 20:37:10,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:10,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:37:10,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:37:10,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:37:10,282 INFO L87 Difference]: Start difference. First operand 171 states and 228 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:10,689 INFO L93 Difference]: Finished difference Result 265 states and 344 transitions. [2022-04-06 20:37:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:37:10,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:37:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:10,690 INFO L225 Difference]: With dead ends: 265 [2022-04-06 20:37:10,690 INFO L226 Difference]: Without dead ends: 251 [2022-04-06 20:37:10,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:37:10,691 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 62 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:10,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 84 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-06 20:37:10,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 171. [2022-04-06 20:37:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.3433734939759037) internal successors, (223), 166 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 227 transitions. [2022-04-06 20:37:10,727 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 227 transitions. Word has length 28 [2022-04-06 20:37:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:10,727 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 227 transitions. [2022-04-06 20:37:10,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:10,727 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 227 transitions. [2022-04-06 20:37:10,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:37:10,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:10,728 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:10,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:10,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:10,950 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:10,950 INFO L85 PathProgramCache]: Analyzing trace with hash -811576638, now seen corresponding path program 23 times [2022-04-06 20:37:10,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:10,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [209184990] [2022-04-06 20:37:10,952 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:10,952 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:10,952 INFO L85 PathProgramCache]: Analyzing trace with hash -811576638, now seen corresponding path program 24 times [2022-04-06 20:37:10,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:10,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376270465] [2022-04-06 20:37:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:10,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:11,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:11,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:11,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376270465] [2022-04-06 20:37:11,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376270465] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:11,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049376202] [2022-04-06 20:37:11,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:11,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:11,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:11,137 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:11,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:37:11,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:37:11,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:37:11,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:11,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:11,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049376202] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:11,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:11,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:37:11,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:11,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [209184990] [2022-04-06 20:37:11,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [209184990] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:11,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:11,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:37:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345932648] [2022-04-06 20:37:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:11,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:37:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:37:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:37:11,611 INFO L87 Difference]: Start difference. First operand 171 states and 227 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:12,662 INFO L93 Difference]: Finished difference Result 386 states and 557 transitions. [2022-04-06 20:37:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:37:12,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:37:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:12,663 INFO L225 Difference]: With dead ends: 386 [2022-04-06 20:37:12,663 INFO L226 Difference]: Without dead ends: 363 [2022-04-06 20:37:12,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1598, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:37:12,664 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 145 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:12,664 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 164 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:37:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-04-06 20:37:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 182. [2022-04-06 20:37:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.3502824858757063) internal successors, (239), 177 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 243 transitions. [2022-04-06 20:37:12,705 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 243 transitions. Word has length 28 [2022-04-06 20:37:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:12,705 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 243 transitions. [2022-04-06 20:37:12,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 243 transitions. [2022-04-06 20:37:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:37:12,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:12,706 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:12,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 20:37:12,915 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,SelfDestructingSolverStorable30 [2022-04-06 20:37:12,915 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:12,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:12,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1242981297, now seen corresponding path program 25 times [2022-04-06 20:37:12,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:12,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1816008147] [2022-04-06 20:37:12,916 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:12,916 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:12,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1242981297, now seen corresponding path program 26 times [2022-04-06 20:37:12,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:12,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411223979] [2022-04-06 20:37:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:12,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:13,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:13,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411223979] [2022-04-06 20:37:13,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411223979] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990853212] [2022-04-06 20:37:13,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:13,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:13,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:13,108 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:13,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:37:13,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:13,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:13,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:37:13,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:13,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:13,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990853212] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:13,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:13,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:37:13,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:13,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1816008147] [2022-04-06 20:37:13,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1816008147] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:13,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:13,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:37:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743678262] [2022-04-06 20:37:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:13,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:37:13,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:37:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:37:13,594 INFO L87 Difference]: Start difference. First operand 182 states and 243 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:14,816 INFO L93 Difference]: Finished difference Result 411 states and 595 transitions. [2022-04-06 20:37:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:37:14,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:37:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:14,823 INFO L225 Difference]: With dead ends: 411 [2022-04-06 20:37:14,823 INFO L226 Difference]: Without dead ends: 388 [2022-04-06 20:37:14,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:37:14,824 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 162 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:14,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 174 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:37:14,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-04-06 20:37:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 193. [2022-04-06 20:37:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.3563829787234043) internal successors, (255), 188 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 259 transitions. [2022-04-06 20:37:14,866 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 259 transitions. Word has length 29 [2022-04-06 20:37:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:14,866 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 259 transitions. [2022-04-06 20:37:14,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 259 transitions. [2022-04-06 20:37:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:37:14,867 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:14,867 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:14,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 20:37:15,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:15,071 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1500556532, now seen corresponding path program 9 times [2022-04-06 20:37:15,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:15,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [775532028] [2022-04-06 20:37:15,072 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:15,072 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1500556532, now seen corresponding path program 10 times [2022-04-06 20:37:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356074976] [2022-04-06 20:37:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:15,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:37:15,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:15,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356074976] [2022-04-06 20:37:15,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356074976] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:15,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459549504] [2022-04-06 20:37:15,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:15,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:15,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:15,178 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:15,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:37:15,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:15,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:15,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:37:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:37:15,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:37:15,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459549504] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:15,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:15,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 21 [2022-04-06 20:37:15,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:15,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [775532028] [2022-04-06 20:37:15,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [775532028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:15,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:15,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:37:15,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732272567] [2022-04-06 20:37:15,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:15,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:37:15,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:15,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:37:15,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:37:15,453 INFO L87 Difference]: Start difference. First operand 193 states and 259 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:15,898 INFO L93 Difference]: Finished difference Result 280 states and 368 transitions. [2022-04-06 20:37:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:37:15,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:37:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:15,899 INFO L225 Difference]: With dead ends: 280 [2022-04-06 20:37:15,900 INFO L226 Difference]: Without dead ends: 265 [2022-04-06 20:37:15,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:37:15,900 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 68 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:15,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 86 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-04-06 20:37:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 193. [2022-04-06 20:37:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.351063829787234) internal successors, (254), 188 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 258 transitions. [2022-04-06 20:37:15,944 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 258 transitions. Word has length 30 [2022-04-06 20:37:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:15,944 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 258 transitions. [2022-04-06 20:37:15,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 258 transitions. [2022-04-06 20:37:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:37:15,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:15,945 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:15,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 20:37:16,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:16,151 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:16,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1042510132, now seen corresponding path program 11 times [2022-04-06 20:37:16,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:16,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [837567241] [2022-04-06 20:37:16,152 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:16,152 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1042510132, now seen corresponding path program 12 times [2022-04-06 20:37:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:16,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532849409] [2022-04-06 20:37:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:16,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:16,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:37:16,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:16,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532849409] [2022-04-06 20:37:16,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532849409] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:16,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050321086] [2022-04-06 20:37:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:16,284 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:16,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:37:16,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:37:16,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:16,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:37:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:37:16,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:37:16,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050321086] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:16,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:16,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-04-06 20:37:16,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:16,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [837567241] [2022-04-06 20:37:16,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [837567241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:16,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:16,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:16,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828319213] [2022-04-06 20:37:16,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:16,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:16,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:16,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:37:16,478 INFO L87 Difference]: Start difference. First operand 193 states and 258 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:17,075 INFO L93 Difference]: Finished difference Result 279 states and 367 transitions. [2022-04-06 20:37:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:37:17,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:37:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:17,080 INFO L225 Difference]: With dead ends: 279 [2022-04-06 20:37:17,080 INFO L226 Difference]: Without dead ends: 257 [2022-04-06 20:37:17,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:37:17,081 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:17,081 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 98 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-06 20:37:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 194. [2022-04-06 20:37:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.343915343915344) internal successors, (254), 189 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 258 transitions. [2022-04-06 20:37:17,129 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 258 transitions. Word has length 30 [2022-04-06 20:37:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:17,129 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 258 transitions. [2022-04-06 20:37:17,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:17,129 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 258 transitions. [2022-04-06 20:37:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:37:17,129 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:17,129 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:17,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 20:37:17,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:17,330 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:17,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1702554722, now seen corresponding path program 11 times [2022-04-06 20:37:17,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:17,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1997253468] [2022-04-06 20:37:17,331 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:17,331 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:17,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1702554722, now seen corresponding path program 12 times [2022-04-06 20:37:17,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:17,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64706194] [2022-04-06 20:37:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:17,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:17,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:37:17,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:17,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64706194] [2022-04-06 20:37:17,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64706194] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:17,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975187931] [2022-04-06 20:37:17,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:17,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:17,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:17,443 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:17,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:37:17,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:37:17,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:17,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:37:17,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:37:17,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:37:17,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975187931] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:17,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:17,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:37:17,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:17,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1997253468] [2022-04-06 20:37:17,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1997253468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:17,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:17,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:37:17,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013963609] [2022-04-06 20:37:17,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:17,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:37:17,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:17,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:37:17,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:37:17,731 INFO L87 Difference]: Start difference. First operand 194 states and 258 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:18,207 INFO L93 Difference]: Finished difference Result 302 states and 392 transitions. [2022-04-06 20:37:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:37:18,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:37:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:18,210 INFO L225 Difference]: With dead ends: 302 [2022-04-06 20:37:18,210 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 20:37:18,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:37:18,210 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 80 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:18,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 91 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 20:37:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 194. [2022-04-06 20:37:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.3386243386243386) internal successors, (253), 189 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 257 transitions. [2022-04-06 20:37:18,259 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 257 transitions. Word has length 30 [2022-04-06 20:37:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:18,259 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 257 transitions. [2022-04-06 20:37:18,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 257 transitions. [2022-04-06 20:37:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:37:18,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:18,259 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:18,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 20:37:18,460 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,SelfDestructingSolverStorable34 [2022-04-06 20:37:18,460 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1731623838, now seen corresponding path program 27 times [2022-04-06 20:37:18,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:18,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [356466906] [2022-04-06 20:37:18,461 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:18,461 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:18,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1731623838, now seen corresponding path program 28 times [2022-04-06 20:37:18,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:18,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079409929] [2022-04-06 20:37:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:18,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:18,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:18,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079409929] [2022-04-06 20:37:18,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079409929] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095680692] [2022-04-06 20:37:18,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:18,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:18,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:18,699 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:18,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:37:18,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:18,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:18,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:37:18,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:18,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:19,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095680692] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:19,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:19,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:37:19,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:19,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [356466906] [2022-04-06 20:37:19,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [356466906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:19,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:19,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:37:19,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113286314] [2022-04-06 20:37:19,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:19,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:37:19,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:19,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:37:19,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:37:19,256 INFO L87 Difference]: Start difference. First operand 194 states and 257 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:20,534 INFO L93 Difference]: Finished difference Result 437 states and 631 transitions. [2022-04-06 20:37:20,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:37:20,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:37:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:20,535 INFO L225 Difference]: With dead ends: 437 [2022-04-06 20:37:20,536 INFO L226 Difference]: Without dead ends: 414 [2022-04-06 20:37:20,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=602, Invalid=2050, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:37:20,537 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 174 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:20,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 186 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:37:20,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-04-06 20:37:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 205. [2022-04-06 20:37:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.345) internal successors, (269), 200 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 273 transitions. [2022-04-06 20:37:20,591 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 273 transitions. Word has length 30 [2022-04-06 20:37:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:20,591 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 273 transitions. [2022-04-06 20:37:20,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 273 transitions. [2022-04-06 20:37:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:37:20,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:20,592 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:20,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 20:37:20,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 20:37:20,796 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash -543637167, now seen corresponding path program 5 times [2022-04-06 20:37:20,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1475355425] [2022-04-06 20:37:20,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:20,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash -543637167, now seen corresponding path program 6 times [2022-04-06 20:37:20,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:20,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902663078] [2022-04-06 20:37:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:20,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:21,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:37:21,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:21,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902663078] [2022-04-06 20:37:21,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902663078] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:21,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722602934] [2022-04-06 20:37:21,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:21,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:21,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:21,123 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:21,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:37:21,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:21,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:21,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:37:21,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:37:21,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:37:21,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722602934] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:21,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:21,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2022-04-06 20:37:21,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:21,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1475355425] [2022-04-06 20:37:21,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1475355425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:21,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:21,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:21,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503302167] [2022-04-06 20:37:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:21,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:21,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:21,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:21,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:37:21,547 INFO L87 Difference]: Start difference. First operand 205 states and 273 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:21,959 INFO L93 Difference]: Finished difference Result 215 states and 283 transitions. [2022-04-06 20:37:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:37:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:37:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:21,960 INFO L225 Difference]: With dead ends: 215 [2022-04-06 20:37:21,960 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 20:37:21,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:37:21,961 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:21,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 56 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:21,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 20:37:22,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-04-06 20:37:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.3432835820895523) internal successors, (270), 201 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 274 transitions. [2022-04-06 20:37:22,013 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 274 transitions. Word has length 31 [2022-04-06 20:37:22,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:22,013 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 274 transitions. [2022-04-06 20:37:22,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:22,013 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 274 transitions. [2022-04-06 20:37:22,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:37:22,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:22,014 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:22,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 20:37:22,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:22,221 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1558438816, now seen corresponding path program 13 times [2022-04-06 20:37:22,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:22,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [677383787] [2022-04-06 20:37:22,223 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:22,223 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:22,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1558438816, now seen corresponding path program 14 times [2022-04-06 20:37:22,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:22,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167767901] [2022-04-06 20:37:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:22,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:22,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:22,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167767901] [2022-04-06 20:37:22,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167767901] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578047971] [2022-04-06 20:37:22,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:22,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:22,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:22,403 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:22,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:37:22,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:22,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:22,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:37:22,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:37:22,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:37:22,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578047971] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:22,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:22,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 22 [2022-04-06 20:37:22,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:22,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [677383787] [2022-04-06 20:37:22,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [677383787] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:22,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:22,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833938009] [2022-04-06 20:37:22,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:22,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:22,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:22,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:22,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:37:22,664 INFO L87 Difference]: Start difference. First operand 206 states and 274 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:24,037 INFO L93 Difference]: Finished difference Result 321 states and 448 transitions. [2022-04-06 20:37:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:37:24,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:37:24,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:24,039 INFO L225 Difference]: With dead ends: 321 [2022-04-06 20:37:24,039 INFO L226 Difference]: Without dead ends: 307 [2022-04-06 20:37:24,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=4481, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:37:24,040 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 93 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:24,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 96 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:37:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-04-06 20:37:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 214. [2022-04-06 20:37:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.3301435406698565) internal successors, (278), 209 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 282 transitions. [2022-04-06 20:37:24,095 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 282 transitions. Word has length 31 [2022-04-06 20:37:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:24,095 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 282 transitions. [2022-04-06 20:37:24,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 282 transitions. [2022-04-06 20:37:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:37:24,096 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:24,096 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:24,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 20:37:24,299 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,SelfDestructingSolverStorable37 [2022-04-06 20:37:24,300 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:24,300 INFO L85 PathProgramCache]: Analyzing trace with hash 300326575, now seen corresponding path program 29 times [2022-04-06 20:37:24,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:24,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [421090174] [2022-04-06 20:37:24,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:24,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash 300326575, now seen corresponding path program 30 times [2022-04-06 20:37:24,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632616509] [2022-04-06 20:37:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:24,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:24,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:24,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:24,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632616509] [2022-04-06 20:37:24,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632616509] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:24,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696072433] [2022-04-06 20:37:24,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:24,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:24,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:24,556 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:24,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:37:24,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:37:24,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:37:24,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:24,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:25,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696072433] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:25,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:25,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:37:25,297 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [421090174] [2022-04-06 20:37:25,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [421090174] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:25,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:25,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:37:25,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338676482] [2022-04-06 20:37:25,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:25,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:37:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:37:25,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:37:25,299 INFO L87 Difference]: Start difference. First operand 214 states and 282 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:26,837 INFO L93 Difference]: Finished difference Result 502 states and 724 transitions. [2022-04-06 20:37:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:37:26,837 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:37:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:26,838 INFO L225 Difference]: With dead ends: 502 [2022-04-06 20:37:26,838 INFO L226 Difference]: Without dead ends: 479 [2022-04-06 20:37:26,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=673, Invalid=2297, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:37:26,839 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 189 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2772 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:26,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 198 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2772 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:37:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-04-06 20:37:26,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 225. [2022-04-06 20:37:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.3363636363636364) internal successors, (294), 220 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 298 transitions. [2022-04-06 20:37:26,909 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 298 transitions. Word has length 31 [2022-04-06 20:37:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:26,909 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 298 transitions. [2022-04-06 20:37:26,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 298 transitions. [2022-04-06 20:37:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:37:26,910 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:26,910 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:26,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 20:37:27,113 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,SelfDestructingSolverStorable38 [2022-04-06 20:37:27,113 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:27,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1990656643, now seen corresponding path program 7 times [2022-04-06 20:37:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:27,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1239579632] [2022-04-06 20:37:27,114 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:27,114 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:27,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1990656643, now seen corresponding path program 8 times [2022-04-06 20:37:27,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:27,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663075520] [2022-04-06 20:37:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:27,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:27,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:37:27,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:27,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663075520] [2022-04-06 20:37:27,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663075520] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:27,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115115213] [2022-04-06 20:37:27,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:27,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:27,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:27,176 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:27,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:37:27,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:27,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:27,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:37:27,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:37:27,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:37:27,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115115213] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:27,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:27,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-04-06 20:37:27,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:27,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1239579632] [2022-04-06 20:37:27,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1239579632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:27,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:27,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:37:27,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329283300] [2022-04-06 20:37:27,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:27,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:37:27,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:27,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:37:27,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:37:27,335 INFO L87 Difference]: Start difference. First operand 225 states and 298 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:27,604 INFO L93 Difference]: Finished difference Result 252 states and 333 transitions. [2022-04-06 20:37:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:37:27,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:37:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:27,606 INFO L225 Difference]: With dead ends: 252 [2022-04-06 20:37:27,606 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 20:37:27,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:37:27,609 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:27,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 57 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:27,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 20:37:27,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 211. [2022-04-06 20:37:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.3495145631067962) internal successors, (278), 206 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 282 transitions. [2022-04-06 20:37:27,685 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 282 transitions. Word has length 32 [2022-04-06 20:37:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:27,685 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 282 transitions. [2022-04-06 20:37:27,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:27,686 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 282 transitions. [2022-04-06 20:37:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:37:27,686 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:27,687 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:27,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 20:37:27,889 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,SelfDestructingSolverStorable39 [2022-04-06 20:37:27,889 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1320683330, now seen corresponding path program 7 times [2022-04-06 20:37:27,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:27,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [415564017] [2022-04-06 20:37:27,890 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:27,890 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:27,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1320683330, now seen corresponding path program 8 times [2022-04-06 20:37:27,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:27,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144426617] [2022-04-06 20:37:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:27,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:27,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:37:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:27,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144426617] [2022-04-06 20:37:27,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144426617] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:27,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761515689] [2022-04-06 20:37:27,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:27,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:27,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:27,999 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:27,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:37:28,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:28,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:37:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:37:28,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:37:28,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761515689] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:28,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:28,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-04-06 20:37:28,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:28,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [415564017] [2022-04-06 20:37:28,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [415564017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:28,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:28,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:37:28,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267018502] [2022-04-06 20:37:28,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:28,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:37:28,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:37:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:37:28,206 INFO L87 Difference]: Start difference. First operand 211 states and 282 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:28,543 INFO L93 Difference]: Finished difference Result 291 states and 404 transitions. [2022-04-06 20:37:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:37:28,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:37:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:28,544 INFO L225 Difference]: With dead ends: 291 [2022-04-06 20:37:28,544 INFO L226 Difference]: Without dead ends: 280 [2022-04-06 20:37:28,544 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:37:28,544 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:28,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 59 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-04-06 20:37:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 252. [2022-04-06 20:37:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.3441295546558705) internal successors, (332), 247 states have internal predecessors, (332), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 336 transitions. [2022-04-06 20:37:28,649 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 336 transitions. Word has length 32 [2022-04-06 20:37:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:28,650 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 336 transitions. [2022-04-06 20:37:28,650 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:28,650 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 336 transitions. [2022-04-06 20:37:28,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:37:28,651 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:28,651 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:28,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:28,870 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:28,871 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash 904933634, now seen corresponding path program 13 times [2022-04-06 20:37:28,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:28,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [804410457] [2022-04-06 20:37:28,872 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:28,872 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:28,872 INFO L85 PathProgramCache]: Analyzing trace with hash 904933634, now seen corresponding path program 14 times [2022-04-06 20:37:28,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:28,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123674277] [2022-04-06 20:37:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:28,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:28,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:37:29,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:29,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123674277] [2022-04-06 20:37:29,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123674277] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:29,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139837604] [2022-04-06 20:37:29,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:29,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:29,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:29,004 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:29,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:37:29,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:29,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:29,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:37:29,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:37:29,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:37:29,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139837604] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:29,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:29,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:37:29,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:29,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [804410457] [2022-04-06 20:37:29,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [804410457] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:29,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:29,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:37:29,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680574682] [2022-04-06 20:37:29,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:29,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:37:29,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:29,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:37:29,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:37:29,289 INFO L87 Difference]: Start difference. First operand 252 states and 336 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:29,863 INFO L93 Difference]: Finished difference Result 370 states and 478 transitions. [2022-04-06 20:37:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:37:29,863 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:37:29,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:29,864 INFO L225 Difference]: With dead ends: 370 [2022-04-06 20:37:29,864 INFO L226 Difference]: Without dead ends: 354 [2022-04-06 20:37:29,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:37:29,865 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:29,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 87 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-04-06 20:37:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 252. [2022-04-06 20:37:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.3400809716599191) internal successors, (331), 247 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 335 transitions. [2022-04-06 20:37:29,968 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 335 transitions. Word has length 32 [2022-04-06 20:37:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:29,968 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 335 transitions. [2022-04-06 20:37:29,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 335 transitions. [2022-04-06 20:37:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:37:29,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:29,969 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:29,988 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 20:37:30,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:30,179 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash 741226194, now seen corresponding path program 15 times [2022-04-06 20:37:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:30,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335940965] [2022-04-06 20:37:30,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:30,180 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash 741226194, now seen corresponding path program 16 times [2022-04-06 20:37:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:30,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083928221] [2022-04-06 20:37:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:30,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:30,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:37:30,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:30,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083928221] [2022-04-06 20:37:30,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083928221] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:30,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112184727] [2022-04-06 20:37:30,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:30,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:30,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:30,312 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:30,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:37:30,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:30,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:30,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:37:30,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:37:30,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:37:30,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112184727] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:30,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:30,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:37:30,645 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:30,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335940965] [2022-04-06 20:37:30,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335940965] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:30,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:30,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:37:30,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101106161] [2022-04-06 20:37:30,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:30,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:37:30,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:37:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:37:30,646 INFO L87 Difference]: Start difference. First operand 252 states and 335 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:31,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:31,267 INFO L93 Difference]: Finished difference Result 395 states and 506 transitions. [2022-04-06 20:37:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:37:31,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:37:31,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:31,269 INFO L225 Difference]: With dead ends: 395 [2022-04-06 20:37:31,269 INFO L226 Difference]: Without dead ends: 379 [2022-04-06 20:37:31,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:37:31,269 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 78 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:31,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 100 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-04-06 20:37:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 252. [2022-04-06 20:37:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.3360323886639676) internal successors, (330), 247 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 334 transitions. [2022-04-06 20:37:31,344 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 334 transitions. Word has length 32 [2022-04-06 20:37:31,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:31,344 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 334 transitions. [2022-04-06 20:37:31,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:31,344 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 334 transitions. [2022-04-06 20:37:31,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:37:31,345 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:31,345 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:31,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-04-06 20:37:31,546 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,SelfDestructingSolverStorable42 [2022-04-06 20:37:31,546 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:31,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1133720062, now seen corresponding path program 31 times [2022-04-06 20:37:31,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:31,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [870002446] [2022-04-06 20:37:31,547 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:31,547 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1133720062, now seen corresponding path program 32 times [2022-04-06 20:37:31,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:31,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598552335] [2022-04-06 20:37:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:31,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:31,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:31,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:31,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598552335] [2022-04-06 20:37:31,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598552335] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:31,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738874494] [2022-04-06 20:37:31,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:31,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:31,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:31,777 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:31,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:37:31,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:31,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:31,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:37:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:31,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:32,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738874494] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:32,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:32,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:37:32,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:32,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [870002446] [2022-04-06 20:37:32,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [870002446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:32,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:32,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:37:32,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795088449] [2022-04-06 20:37:32,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:32,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:37:32,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:32,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:37:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:37:32,378 INFO L87 Difference]: Start difference. First operand 252 states and 334 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:34,119 INFO L93 Difference]: Finished difference Result 573 states and 820 transitions. [2022-04-06 20:37:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:37:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:37:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:34,121 INFO L225 Difference]: With dead ends: 573 [2022-04-06 20:37:34,121 INFO L226 Difference]: Without dead ends: 541 [2022-04-06 20:37:34,122 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=748, Invalid=2558, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:37:34,122 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 184 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 3064 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:34,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 207 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3064 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:37:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-04-06 20:37:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 265. [2022-04-06 20:37:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.3423076923076922) internal successors, (349), 260 states have internal predecessors, (349), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 353 transitions. [2022-04-06 20:37:34,202 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 353 transitions. Word has length 32 [2022-04-06 20:37:34,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:34,202 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 353 transitions. [2022-04-06 20:37:34,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 353 transitions. [2022-04-06 20:37:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:37:34,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:34,203 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:34,224 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 20:37:34,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 20:37:34,418 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:34,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:34,418 INFO L85 PathProgramCache]: Analyzing trace with hash -597404912, now seen corresponding path program 15 times [2022-04-06 20:37:34,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:34,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [188571772] [2022-04-06 20:37:34,419 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:34,419 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:34,419 INFO L85 PathProgramCache]: Analyzing trace with hash -597404912, now seen corresponding path program 16 times [2022-04-06 20:37:34,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:34,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569715202] [2022-04-06 20:37:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:34,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:34,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:37:34,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569715202] [2022-04-06 20:37:34,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569715202] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303698962] [2022-04-06 20:37:34,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:34,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:34,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:34,591 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:34,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:37:34,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:34,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:37:34,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:37:34,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:37:34,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303698962] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:34,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:34,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 22 [2022-04-06 20:37:34,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:34,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [188571772] [2022-04-06 20:37:34,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [188571772] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:34,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:34,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:34,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320644960] [2022-04-06 20:37:34,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:34,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:34,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:37:34,865 INFO L87 Difference]: Start difference. First operand 265 states and 353 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:35,814 INFO L93 Difference]: Finished difference Result 382 states and 496 transitions. [2022-04-06 20:37:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:37:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:37:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:35,816 INFO L225 Difference]: With dead ends: 382 [2022-04-06 20:37:35,816 INFO L226 Difference]: Without dead ends: 346 [2022-04-06 20:37:35,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:37:35,816 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 66 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:35,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 112 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-04-06 20:37:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 266. [2022-04-06 20:37:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.3333333333333333) internal successors, (348), 261 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 352 transitions. [2022-04-06 20:37:35,928 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 352 transitions. Word has length 33 [2022-04-06 20:37:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:35,928 INFO L478 AbstractCegarLoop]: Abstraction has 266 states and 352 transitions. [2022-04-06 20:37:35,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 352 transitions. [2022-04-06 20:37:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:37:35,929 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:35,929 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:35,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 20:37:36,149 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,SelfDestructingSolverStorable44 [2022-04-06 20:37:36,150 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:36,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1655474447, now seen corresponding path program 33 times [2022-04-06 20:37:36,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:36,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907522634] [2022-04-06 20:37:36,151 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:36,151 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:36,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1655474447, now seen corresponding path program 34 times [2022-04-06 20:37:36,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:36,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878822853] [2022-04-06 20:37:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:36,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:36,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:36,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878822853] [2022-04-06 20:37:36,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878822853] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:36,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755679590] [2022-04-06 20:37:36,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:36,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:36,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:36,432 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:36,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:37:36,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:36,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:36,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:37:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:36,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:37,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755679590] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:37,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:37,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:37:37,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:37,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907522634] [2022-04-06 20:37:37,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907522634] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:37,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:37,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:37:37,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4633452] [2022-04-06 20:37:37,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:37,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:37:37,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:37,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:37:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:37:37,136 INFO L87 Difference]: Start difference. First operand 266 states and 352 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:39,094 INFO L93 Difference]: Finished difference Result 603 states and 863 transitions. [2022-04-06 20:37:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:37:39,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:37:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:39,096 INFO L225 Difference]: With dead ends: 603 [2022-04-06 20:37:39,096 INFO L226 Difference]: Without dead ends: 571 [2022-04-06 20:37:39,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=827, Invalid=2833, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:37:39,096 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 200 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 3543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:39,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 219 Invalid, 3543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:37:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-04-06 20:37:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 279. [2022-04-06 20:37:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.3394160583941606) internal successors, (367), 274 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 371 transitions. [2022-04-06 20:37:39,187 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 371 transitions. Word has length 33 [2022-04-06 20:37:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:39,187 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 371 transitions. [2022-04-06 20:37:39,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 371 transitions. [2022-04-06 20:37:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:37:39,188 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:39,188 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:39,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:39,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 20:37:39,407 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:39,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:39,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1633078978, now seen corresponding path program 17 times [2022-04-06 20:37:39,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:39,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1085640713] [2022-04-06 20:37:39,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:39,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:39,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1633078978, now seen corresponding path program 18 times [2022-04-06 20:37:39,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:39,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254074902] [2022-04-06 20:37:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:39,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:39,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:39,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:39,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254074902] [2022-04-06 20:37:39,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254074902] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:39,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75110469] [2022-04-06 20:37:39,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:39,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:39,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:39,597 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:39,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:37:39,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:37:39,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:39,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:37:39,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:37:39,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:37:39,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75110469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:39,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:39,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2022-04-06 20:37:39,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:39,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1085640713] [2022-04-06 20:37:39,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1085640713] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:39,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:39,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:37:39,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144162836] [2022-04-06 20:37:39,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:39,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:37:39,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:39,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:37:39,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:37:39,935 INFO L87 Difference]: Start difference. First operand 279 states and 371 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:41,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:41,978 INFO L93 Difference]: Finished difference Result 426 states and 594 transitions. [2022-04-06 20:37:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:37:41,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:37:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:41,980 INFO L225 Difference]: With dead ends: 426 [2022-04-06 20:37:41,980 INFO L226 Difference]: Without dead ends: 411 [2022-04-06 20:37:41,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=455, Invalid=7201, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:37:41,981 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 101 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:41,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 110 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:37:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-04-06 20:37:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 288. [2022-04-06 20:37:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.3286219081272084) internal successors, (376), 283 states have internal predecessors, (376), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 380 transitions. [2022-04-06 20:37:42,074 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 380 transitions. Word has length 34 [2022-04-06 20:37:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:42,074 INFO L478 AbstractCegarLoop]: Abstraction has 288 states and 380 transitions. [2022-04-06 20:37:42,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 380 transitions. [2022-04-06 20:37:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:37:42,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:42,075 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:42,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:42,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:42,277 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1620223476, now seen corresponding path program 17 times [2022-04-06 20:37:42,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:42,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1170413836] [2022-04-06 20:37:42,278 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:42,278 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:42,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1620223476, now seen corresponding path program 18 times [2022-04-06 20:37:42,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:42,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762489279] [2022-04-06 20:37:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:42,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:42,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:37:42,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:42,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762489279] [2022-04-06 20:37:42,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762489279] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:42,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609980502] [2022-04-06 20:37:42,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:42,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:42,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:42,423 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:42,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:37:42,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:37:42,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:37:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:37:42,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:37:42,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609980502] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:42,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:42,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:37:42,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1170413836] [2022-04-06 20:37:42,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1170413836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:42,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:42,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:42,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943450304] [2022-04-06 20:37:42,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:42,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:42,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:37:42,871 INFO L87 Difference]: Start difference. First operand 288 states and 380 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:43,713 INFO L93 Difference]: Finished difference Result 437 states and 565 transitions. [2022-04-06 20:37:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:37:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:37:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:43,715 INFO L225 Difference]: With dead ends: 437 [2022-04-06 20:37:43,715 INFO L226 Difference]: Without dead ends: 420 [2022-04-06 20:37:43,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:37:43,716 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:43,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 109 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-04-06 20:37:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 288. [2022-04-06 20:37:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.325088339222615) internal successors, (375), 283 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 379 transitions. [2022-04-06 20:37:43,813 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 379 transitions. Word has length 34 [2022-04-06 20:37:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:43,814 INFO L478 AbstractCegarLoop]: Abstraction has 288 states and 379 transitions. [2022-04-06 20:37:43,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 379 transitions. [2022-04-06 20:37:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:37:43,814 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:43,814 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:43,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:44,021 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,SelfDestructingSolverStorable47 [2022-04-06 20:37:44,021 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1290423902, now seen corresponding path program 19 times [2022-04-06 20:37:44,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:44,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966614677] [2022-04-06 20:37:44,022 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:44,022 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:44,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1290423902, now seen corresponding path program 20 times [2022-04-06 20:37:44,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:44,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443597018] [2022-04-06 20:37:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:44,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:44,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:37:44,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:44,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443597018] [2022-04-06 20:37:44,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443597018] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:44,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018602919] [2022-04-06 20:37:44,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:44,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:44,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:44,167 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:44,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:37:44,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:44,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:44,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:37:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:37:44,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:37:44,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018602919] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:44,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:44,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:37:44,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:44,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966614677] [2022-04-06 20:37:44,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966614677] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:44,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:44,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:44,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257815242] [2022-04-06 20:37:44,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:44,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:44,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:44,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:37:44,507 INFO L87 Difference]: Start difference. First operand 288 states and 379 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:45,381 INFO L93 Difference]: Finished difference Result 465 states and 597 transitions. [2022-04-06 20:37:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:37:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:37:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:45,382 INFO L225 Difference]: With dead ends: 465 [2022-04-06 20:37:45,382 INFO L226 Difference]: Without dead ends: 448 [2022-04-06 20:37:45,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:37:45,383 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 96 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:45,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 117 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-04-06 20:37:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 288. [2022-04-06 20:37:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.3215547703180213) internal successors, (374), 283 states have internal predecessors, (374), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 378 transitions. [2022-04-06 20:37:45,504 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 378 transitions. Word has length 34 [2022-04-06 20:37:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:45,504 INFO L478 AbstractCegarLoop]: Abstraction has 288 states and 378 transitions. [2022-04-06 20:37:45,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:45,504 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 378 transitions. [2022-04-06 20:37:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:37:45,505 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:45,505 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:45,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:45,727 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,SelfDestructingSolverStorable48 [2022-04-06 20:37:45,727 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2073808990, now seen corresponding path program 35 times [2022-04-06 20:37:45,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:45,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020924122] [2022-04-06 20:37:45,728 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:45,728 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:45,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2073808990, now seen corresponding path program 36 times [2022-04-06 20:37:45,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:45,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035755436] [2022-04-06 20:37:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:45,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:46,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:46,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:46,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035755436] [2022-04-06 20:37:46,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035755436] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:46,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325306391] [2022-04-06 20:37:46,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:46,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:46,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:46,045 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:46,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:37:46,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:37:46,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:46,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:37:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:46,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:46,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325306391] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:46,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:46,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:37:46,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020924122] [2022-04-06 20:37:46,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020924122] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:46,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:46,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:37:46,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549681470] [2022-04-06 20:37:46,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:46,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:37:46,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:37:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:37:46,972 INFO L87 Difference]: Start difference. First operand 288 states and 378 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:49,280 INFO L93 Difference]: Finished difference Result 679 states and 971 transitions. [2022-04-06 20:37:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:37:49,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:37:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:49,282 INFO L225 Difference]: With dead ends: 679 [2022-04-06 20:37:49,282 INFO L226 Difference]: Without dead ends: 647 [2022-04-06 20:37:49,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=910, Invalid=3122, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:37:49,283 INFO L913 BasicCegarLoop]: 129 mSDtfsCounter, 211 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3842 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 3842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:49,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 231 Invalid, 3948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 3842 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:37:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-04-06 20:37:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 301. [2022-04-06 20:37:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.3277027027027026) internal successors, (393), 296 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 397 transitions. [2022-04-06 20:37:49,377 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 397 transitions. Word has length 34 [2022-04-06 20:37:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:49,377 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 397 transitions. [2022-04-06 20:37:49,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 397 transitions. [2022-04-06 20:37:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:37:49,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:49,378 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:49,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 20:37:49,579 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,SelfDestructingSolverStorable49 [2022-04-06 20:37:49,580 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:49,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:49,580 INFO L85 PathProgramCache]: Analyzing trace with hash 991978272, now seen corresponding path program 19 times [2022-04-06 20:37:49,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:49,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1141261135] [2022-04-06 20:37:49,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:49,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:49,581 INFO L85 PathProgramCache]: Analyzing trace with hash 991978272, now seen corresponding path program 20 times [2022-04-06 20:37:49,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:49,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639278462] [2022-04-06 20:37:49,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:49,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:49,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:37:49,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:49,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639278462] [2022-04-06 20:37:49,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639278462] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:49,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423310905] [2022-04-06 20:37:49,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:49,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:49,780 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:49,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:37:49,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:49,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:49,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:37:49,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:37:50,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:37:50,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423310905] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:50,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:50,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 23 [2022-04-06 20:37:50,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:50,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1141261135] [2022-04-06 20:37:50,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1141261135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:50,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:50,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:37:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49007570] [2022-04-06 20:37:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:50,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:37:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:37:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:37:50,083 INFO L87 Difference]: Start difference. First operand 301 states and 397 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:51,223 INFO L93 Difference]: Finished difference Result 449 states and 583 transitions. [2022-04-06 20:37:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:37:51,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:37:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:51,224 INFO L225 Difference]: With dead ends: 449 [2022-04-06 20:37:51,225 INFO L226 Difference]: Without dead ends: 410 [2022-04-06 20:37:51,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=2136, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:37:51,225 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 83 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:51,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 108 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-04-06 20:37:51,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 302. [2022-04-06 20:37:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 297 states have (on average 1.3198653198653199) internal successors, (392), 297 states have internal predecessors, (392), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 396 transitions. [2022-04-06 20:37:51,322 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 396 transitions. Word has length 35 [2022-04-06 20:37:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:51,323 INFO L478 AbstractCegarLoop]: Abstraction has 302 states and 396 transitions. [2022-04-06 20:37:51,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 396 transitions. [2022-04-06 20:37:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:37:51,324 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:51,324 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:51,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:51,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:51,524 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:51,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1717478545, now seen corresponding path program 37 times [2022-04-06 20:37:51,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:51,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2069477795] [2022-04-06 20:37:51,532 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:51,532 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1717478545, now seen corresponding path program 38 times [2022-04-06 20:37:51,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:51,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351568717] [2022-04-06 20:37:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:51,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:51,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:51,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:51,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351568717] [2022-04-06 20:37:51,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351568717] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:51,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090479479] [2022-04-06 20:37:51,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:51,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:51,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:51,875 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:51,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:37:51,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:37:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:52,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:52,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090479479] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:52,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:52,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:37:52,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:52,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2069477795] [2022-04-06 20:37:52,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2069477795] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:52,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:52,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:37:52,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740851139] [2022-04-06 20:37:52,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:52,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:37:52,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:37:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1579, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:37:52,734 INFO L87 Difference]: Start difference. First operand 302 states and 396 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:55,343 INFO L93 Difference]: Finished difference Result 711 states and 1017 transitions. [2022-04-06 20:37:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:37:55,343 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:37:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:55,345 INFO L225 Difference]: With dead ends: 711 [2022-04-06 20:37:55,345 INFO L226 Difference]: Without dead ends: 679 [2022-04-06 20:37:55,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=997, Invalid=3425, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:37:55,346 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 227 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4263 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 4263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:55,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 243 Invalid, 4378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 4263 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:37:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-04-06 20:37:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 315. [2022-04-06 20:37:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.3258064516129033) internal successors, (411), 310 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 415 transitions. [2022-04-06 20:37:55,470 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 415 transitions. Word has length 35 [2022-04-06 20:37:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:55,470 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 415 transitions. [2022-04-06 20:37:55,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 415 transitions. [2022-04-06 20:37:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:55,471 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:55,471 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:55,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 20:37:55,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:55,680 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash 955015874, now seen corresponding path program 9 times [2022-04-06 20:37:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:55,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236935884] [2022-04-06 20:37:55,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:55,682 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:55,682 INFO L85 PathProgramCache]: Analyzing trace with hash 955015874, now seen corresponding path program 10 times [2022-04-06 20:37:55,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:55,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526866015] [2022-04-06 20:37:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:55,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:56,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:37:56,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526866015] [2022-04-06 20:37:56,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526866015] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285007868] [2022-04-06 20:37:56,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:56,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:56,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:56,031 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:56,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:37:56,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:37:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:37:56,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:37:56,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285007868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:56,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:56,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 25 [2022-04-06 20:37:56,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:56,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236935884] [2022-04-06 20:37:56,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236935884] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:56,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:56,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:56,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936386229] [2022-04-06 20:37:56,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:56,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:56,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:56,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:37:56,582 INFO L87 Difference]: Start difference. First operand 315 states and 415 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:57,071 INFO L93 Difference]: Finished difference Result 326 states and 426 transitions. [2022-04-06 20:37:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:37:57,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:37:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:57,072 INFO L225 Difference]: With dead ends: 326 [2022-04-06 20:37:57,072 INFO L226 Difference]: Without dead ends: 316 [2022-04-06 20:37:57,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:37:57,072 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:57,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-04-06 20:37:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2022-04-06 20:37:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.32475884244373) internal successors, (412), 311 states have internal predecessors, (412), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 416 transitions. [2022-04-06 20:37:57,177 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 416 transitions. Word has length 36 [2022-04-06 20:37:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:57,177 INFO L478 AbstractCegarLoop]: Abstraction has 316 states and 416 transitions. [2022-04-06 20:37:57,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 416 transitions. [2022-04-06 20:37:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:57,178 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:57,178 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:57,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:57,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:57,378 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash -562951837, now seen corresponding path program 9 times [2022-04-06 20:37:57,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:57,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1066529703] [2022-04-06 20:37:57,379 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:57,379 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash -562951837, now seen corresponding path program 10 times [2022-04-06 20:37:57,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:57,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105982222] [2022-04-06 20:37:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:57,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:57,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:57,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105982222] [2022-04-06 20:37:57,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105982222] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906532871] [2022-04-06 20:37:57,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:57,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:57,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:57,519 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:57,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:37:57,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:57,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:57,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:37:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:57,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:57,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906532871] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:57,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:57,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2022-04-06 20:37:57,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:57,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1066529703] [2022-04-06 20:37:57,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1066529703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:57,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:57,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:37:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645158677] [2022-04-06 20:37:57,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:57,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:37:57,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:37:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:37:57,747 INFO L87 Difference]: Start difference. First operand 316 states and 416 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:58,286 INFO L93 Difference]: Finished difference Result 417 states and 568 transitions. [2022-04-06 20:37:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:37:58,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:37:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:58,287 INFO L225 Difference]: With dead ends: 417 [2022-04-06 20:37:58,287 INFO L226 Difference]: Without dead ends: 405 [2022-04-06 20:37:58,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:58,288 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:58,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 58 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-04-06 20:37:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 358. [2022-04-06 20:37:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.3286118980169972) internal successors, (469), 353 states have internal predecessors, (469), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 473 transitions. [2022-04-06 20:37:58,424 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 473 transitions. Word has length 36 [2022-04-06 20:37:58,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:58,425 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 473 transitions. [2022-04-06 20:37:58,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:58,425 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 473 transitions. [2022-04-06 20:37:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:58,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:58,425 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:58,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:58,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 20:37:58,639 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:58,640 INFO L85 PathProgramCache]: Analyzing trace with hash -777486412, now seen corresponding path program 21 times [2022-04-06 20:37:58,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:58,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1229384503] [2022-04-06 20:37:58,640 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:58,640 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:58,640 INFO L85 PathProgramCache]: Analyzing trace with hash -777486412, now seen corresponding path program 22 times [2022-04-06 20:37:58,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:58,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254236133] [2022-04-06 20:37:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:58,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:58,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:37:58,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:58,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254236133] [2022-04-06 20:37:58,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254236133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:58,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390124630] [2022-04-06 20:37:58,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:58,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:58,857 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:58,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:37:58,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:58,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:58,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:37:58,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:37:59,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:37:59,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390124630] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:59,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:59,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2022-04-06 20:37:59,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1229384503] [2022-04-06 20:37:59,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1229384503] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:59,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:59,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:37:59,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824227138] [2022-04-06 20:37:59,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:59,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:37:59,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:59,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:37:59,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:37:59,153 INFO L87 Difference]: Start difference. First operand 358 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:00,476 INFO L93 Difference]: Finished difference Result 476 states and 623 transitions. [2022-04-06 20:38:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:38:00,477 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:38:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:00,478 INFO L225 Difference]: With dead ends: 476 [2022-04-06 20:38:00,478 INFO L226 Difference]: Without dead ends: 461 [2022-04-06 20:38:00,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:38:00,478 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 73 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:00,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 123 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-04-06 20:38:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 359. [2022-04-06 20:38:00,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.3276836158192091) internal successors, (470), 354 states have internal predecessors, (470), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 474 transitions. [2022-04-06 20:38:00,619 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 474 transitions. Word has length 36 [2022-04-06 20:38:00,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:00,620 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 474 transitions. [2022-04-06 20:38:00,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:00,620 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 474 transitions. [2022-04-06 20:38:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:38:00,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:00,620 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:00,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 20:38:00,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 20:38:00,821 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash -84969854, now seen corresponding path program 21 times [2022-04-06 20:38:00,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:00,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1599465033] [2022-04-06 20:38:00,822 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:00,822 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:00,822 INFO L85 PathProgramCache]: Analyzing trace with hash -84969854, now seen corresponding path program 22 times [2022-04-06 20:38:00,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:00,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780227620] [2022-04-06 20:38:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:00,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:00,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:38:00,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:00,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780227620] [2022-04-06 20:38:00,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780227620] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:00,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301618939] [2022-04-06 20:38:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:00,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:00,973 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:00,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:38:01,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:01,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:01,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:38:01,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:38:01,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:38:01,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301618939] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:01,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:01,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:38:01,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1599465033] [2022-04-06 20:38:01,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1599465033] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:01,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:01,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:38:01,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144446934] [2022-04-06 20:38:01,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:01,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:38:01,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:38:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:38:01,323 INFO L87 Difference]: Start difference. First operand 359 states and 474 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:02,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:02,365 INFO L93 Difference]: Finished difference Result 533 states and 683 transitions. [2022-04-06 20:38:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:38:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:38:02,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:02,367 INFO L225 Difference]: With dead ends: 533 [2022-04-06 20:38:02,367 INFO L226 Difference]: Without dead ends: 515 [2022-04-06 20:38:02,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1432, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:38:02,367 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 93 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:02,367 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 121 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-04-06 20:38:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 359. [2022-04-06 20:38:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.3248587570621468) internal successors, (469), 354 states have internal predecessors, (469), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 473 transitions. [2022-04-06 20:38:02,513 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 473 transitions. Word has length 36 [2022-04-06 20:38:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:02,513 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 473 transitions. [2022-04-06 20:38:02,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 473 transitions. [2022-04-06 20:38:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:38:02,514 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:02,514 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:02,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:02,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-04-06 20:38:02,737 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:02,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2043557906, now seen corresponding path program 23 times [2022-04-06 20:38:02,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:02,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [503254960] [2022-04-06 20:38:02,738 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:02,738 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2043557906, now seen corresponding path program 24 times [2022-04-06 20:38:02,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:02,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269386118] [2022-04-06 20:38:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:02,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:38:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:02,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269386118] [2022-04-06 20:38:02,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269386118] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:02,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382222266] [2022-04-06 20:38:02,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:02,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:02,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:02,887 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:02,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:38:02,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:38:02,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:38:02,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 20:38:03,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 20:38:03,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382222266] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:03,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:03,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 21 [2022-04-06 20:38:03,115 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:03,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [503254960] [2022-04-06 20:38:03,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [503254960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:03,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:03,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:38:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238325273] [2022-04-06 20:38:03,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:03,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:38:03,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:03,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:38:03,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:38:03,115 INFO L87 Difference]: Start difference. First operand 359 states and 473 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:04,264 INFO L93 Difference]: Finished difference Result 563 states and 717 transitions. [2022-04-06 20:38:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:38:04,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:38:04,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:04,265 INFO L225 Difference]: With dead ends: 563 [2022-04-06 20:38:04,265 INFO L226 Difference]: Without dead ends: 545 [2022-04-06 20:38:04,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:38:04,266 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 107 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:04,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 129 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-04-06 20:38:04,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 359. [2022-04-06 20:38:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.3220338983050848) internal successors, (468), 354 states have internal predecessors, (468), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 472 transitions. [2022-04-06 20:38:04,404 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 472 transitions. Word has length 36 [2022-04-06 20:38:04,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:04,405 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 472 transitions. [2022-04-06 20:38:04,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:04,405 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 472 transitions. [2022-04-06 20:38:04,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:38:04,406 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:04,406 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:04,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 20:38:04,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-04-06 20:38:04,617 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:04,618 INFO L85 PathProgramCache]: Analyzing trace with hash 738830658, now seen corresponding path program 39 times [2022-04-06 20:38:04,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:04,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1362651388] [2022-04-06 20:38:04,618 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:04,618 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:04,618 INFO L85 PathProgramCache]: Analyzing trace with hash 738830658, now seen corresponding path program 40 times [2022-04-06 20:38:04,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:04,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199662539] [2022-04-06 20:38:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:04,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:04,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:04,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:04,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199662539] [2022-04-06 20:38:04,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199662539] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:04,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220056920] [2022-04-06 20:38:04,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:04,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:04,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:04,939 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:04,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:38:04,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:04,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:38:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:05,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:05,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220056920] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:05,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:05,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:38:05,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1362651388] [2022-04-06 20:38:05,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1362651388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:05,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:05,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:38:05,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694939916] [2022-04-06 20:38:05,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:05,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:38:05,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:05,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:38:05,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=1720, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:38:05,774 INFO L87 Difference]: Start difference. First operand 359 states and 472 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:08,735 INFO L93 Difference]: Finished difference Result 810 states and 1162 transitions. [2022-04-06 20:38:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:38:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:38:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:08,737 INFO L225 Difference]: With dead ends: 810 [2022-04-06 20:38:08,737 INFO L226 Difference]: Without dead ends: 775 [2022-04-06 20:38:08,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:38:08,739 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 237 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4707 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 4826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 4707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:08,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 255 Invalid, 4826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 4707 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:38:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-04-06 20:38:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 374. [2022-04-06 20:38:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 369 states have (on average 1.3279132791327912) internal successors, (490), 369 states have internal predecessors, (490), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 494 transitions. [2022-04-06 20:38:08,889 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 494 transitions. Word has length 36 [2022-04-06 20:38:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:08,889 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 494 transitions. [2022-04-06 20:38:08,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 494 transitions. [2022-04-06 20:38:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:38:08,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:08,889 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:08,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 20:38:09,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-04-06 20:38:09,090 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:09,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1464011024, now seen corresponding path program 11 times [2022-04-06 20:38:09,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:09,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753387083] [2022-04-06 20:38:09,091 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:09,091 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1464011024, now seen corresponding path program 12 times [2022-04-06 20:38:09,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:09,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069021455] [2022-04-06 20:38:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:09,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:09,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:38:09,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:09,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069021455] [2022-04-06 20:38:09,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069021455] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:09,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932033281] [2022-04-06 20:38:09,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:09,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:09,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:09,176 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:09,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:38:09,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:38:09,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:09,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:38:09,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:38:09,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:38:09,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932033281] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:09,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:09,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-04-06 20:38:09,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:09,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753387083] [2022-04-06 20:38:09,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753387083] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:09,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:09,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:38:09,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707979495] [2022-04-06 20:38:09,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:09,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:38:09,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:09,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:38:09,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:38:09,382 INFO L87 Difference]: Start difference. First operand 374 states and 494 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:09,774 INFO L93 Difference]: Finished difference Result 413 states and 542 transitions. [2022-04-06 20:38:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:38:09,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:38:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:09,776 INFO L225 Difference]: With dead ends: 413 [2022-04-06 20:38:09,776 INFO L226 Difference]: Without dead ends: 383 [2022-04-06 20:38:09,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:38:09,776 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:09,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 65 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-04-06 20:38:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 359. [2022-04-06 20:38:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.3361581920903955) internal successors, (473), 354 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 477 transitions. [2022-04-06 20:38:09,925 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 477 transitions. Word has length 37 [2022-04-06 20:38:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:09,925 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 477 transitions. [2022-04-06 20:38:09,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 477 transitions. [2022-04-06 20:38:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:38:09,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:09,926 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:09,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:10,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 20:38:10,130 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash 203683232, now seen corresponding path program 23 times [2022-04-06 20:38:10,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:10,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501987557] [2022-04-06 20:38:10,130 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:10,131 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:10,131 INFO L85 PathProgramCache]: Analyzing trace with hash 203683232, now seen corresponding path program 24 times [2022-04-06 20:38:10,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:10,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432068050] [2022-04-06 20:38:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:10,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:10,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:10,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432068050] [2022-04-06 20:38:10,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432068050] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:10,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033058604] [2022-04-06 20:38:10,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:10,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:10,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:10,357 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:10,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:38:10,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:38:10,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:38:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:38:10,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:38:10,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033058604] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:10,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:10,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-04-06 20:38:10,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:10,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1501987557] [2022-04-06 20:38:10,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1501987557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:10,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:10,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:38:10,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217151592] [2022-04-06 20:38:10,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:10,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:38:10,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:38:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:38:10,748 INFO L87 Difference]: Start difference. First operand 359 states and 477 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:13,652 INFO L93 Difference]: Finished difference Result 541 states and 753 transitions. [2022-04-06 20:38:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 20:38:13,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:38:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:13,654 INFO L225 Difference]: With dead ends: 541 [2022-04-06 20:38:13,654 INFO L226 Difference]: Without dead ends: 525 [2022-04-06 20:38:13,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=575, Invalid=10981, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:38:13,655 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:13,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 123 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:38:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-04-06 20:38:13,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 369. [2022-04-06 20:38:13,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 364 states have (on average 1.3269230769230769) internal successors, (483), 364 states have internal predecessors, (483), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 487 transitions. [2022-04-06 20:38:13,830 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 487 transitions. Word has length 37 [2022-04-06 20:38:13,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:13,830 INFO L478 AbstractCegarLoop]: Abstraction has 369 states and 487 transitions. [2022-04-06 20:38:13,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 487 transitions. [2022-04-06 20:38:13,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:38:13,831 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:13,831 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:13,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 20:38:14,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:14,040 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:14,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash -424995377, now seen corresponding path program 41 times [2022-04-06 20:38:14,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:14,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1526597909] [2022-04-06 20:38:14,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:14,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash -424995377, now seen corresponding path program 42 times [2022-04-06 20:38:14,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:14,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218848886] [2022-04-06 20:38:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:14,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:14,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:14,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:14,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218848886] [2022-04-06 20:38:14,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218848886] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:14,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435397356] [2022-04-06 20:38:14,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:14,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:14,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:14,373 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:14,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:38:15,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 20:38:15,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:15,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:38:15,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:15,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:16,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435397356] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:16,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:16,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:38:16,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1526597909] [2022-04-06 20:38:16,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1526597909] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:16,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:16,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:38:16,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381063518] [2022-04-06 20:38:16,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:16,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:38:16,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:38:16,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:38:16,017 INFO L87 Difference]: Start difference. First operand 369 states and 487 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:19,451 INFO L93 Difference]: Finished difference Result 869 states and 1242 transitions. [2022-04-06 20:38:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:38:19,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:38:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:19,453 INFO L225 Difference]: With dead ends: 869 [2022-04-06 20:38:19,453 INFO L226 Difference]: Without dead ends: 832 [2022-04-06 20:38:19,453 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1183, Invalid=4073, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:38:19,454 INFO L913 BasicCegarLoop]: 147 mSDtfsCounter, 239 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 5084 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 5208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 5084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:19,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 264 Invalid, 5208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 5084 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:38:19,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-04-06 20:38:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 384. [2022-04-06 20:38:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 379 states have (on average 1.3324538258575198) internal successors, (505), 379 states have internal predecessors, (505), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 509 transitions. [2022-04-06 20:38:19,615 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 509 transitions. Word has length 37 [2022-04-06 20:38:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:19,615 INFO L478 AbstractCegarLoop]: Abstraction has 384 states and 509 transitions. [2022-04-06 20:38:19,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 509 transitions. [2022-04-06 20:38:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:38:19,615 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:19,615 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:19,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 20:38:19,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:19,816 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -770615006, now seen corresponding path program 25 times [2022-04-06 20:38:19,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:19,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1121304849] [2022-04-06 20:38:19,817 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:19,817 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:19,817 INFO L85 PathProgramCache]: Analyzing trace with hash -770615006, now seen corresponding path program 26 times [2022-04-06 20:38:19,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:19,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735000646] [2022-04-06 20:38:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:19,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:19,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:19,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:19,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735000646] [2022-04-06 20:38:19,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735000646] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:19,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494411552] [2022-04-06 20:38:19,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:19,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:19,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:19,974 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:19,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:38:20,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:20,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:20,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:38:20,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:38:20,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:38:20,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494411552] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:20,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:20,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 40 [2022-04-06 20:38:20,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:20,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1121304849] [2022-04-06 20:38:20,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1121304849] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:20,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:20,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:38:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579123704] [2022-04-06 20:38:20,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:20,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:38:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:20,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:38:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:38:20,620 INFO L87 Difference]: Start difference. First operand 384 states and 509 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:21,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:21,916 INFO L93 Difference]: Finished difference Result 561 states and 726 transitions. [2022-04-06 20:38:21,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:38:21,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:38:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:21,917 INFO L225 Difference]: With dead ends: 561 [2022-04-06 20:38:21,917 INFO L226 Difference]: Without dead ends: 542 [2022-04-06 20:38:21,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=586, Invalid=2836, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:38:21,918 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 87 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:21,918 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 105 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:38:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-04-06 20:38:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 384. [2022-04-06 20:38:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 379 states have (on average 1.3298153034300793) internal successors, (504), 379 states have internal predecessors, (504), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 508 transitions. [2022-04-06 20:38:22,096 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 508 transitions. Word has length 38 [2022-04-06 20:38:22,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:22,096 INFO L478 AbstractCegarLoop]: Abstraction has 384 states and 508 transitions. [2022-04-06 20:38:22,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 508 transitions. [2022-04-06 20:38:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:38:22,097 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:22,097 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:22,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 20:38:22,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:22,298 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:22,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1924187202, now seen corresponding path program 25 times [2022-04-06 20:38:22,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:22,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1632776796] [2022-04-06 20:38:22,299 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:22,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:22,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1924187202, now seen corresponding path program 26 times [2022-04-06 20:38:22,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:22,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15082592] [2022-04-06 20:38:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:22,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:22,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:38:22,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:22,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15082592] [2022-04-06 20:38:22,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15082592] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:22,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888453102] [2022-04-06 20:38:22,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:22,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:22,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:22,516 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:22,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:38:22,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:22,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:38:22,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:38:22,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:38:22,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888453102] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:22,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:22,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 26 [2022-04-06 20:38:22,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:22,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1632776796] [2022-04-06 20:38:22,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1632776796] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:22,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:22,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:38:22,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320735104] [2022-04-06 20:38:22,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:22,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:38:22,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:38:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:38:22,792 INFO L87 Difference]: Start difference. First operand 384 states and 508 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:24,344 INFO L93 Difference]: Finished difference Result 559 states and 725 transitions. [2022-04-06 20:38:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:38:24,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:38:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:24,347 INFO L225 Difference]: With dead ends: 559 [2022-04-06 20:38:24,347 INFO L226 Difference]: Without dead ends: 515 [2022-04-06 20:38:24,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=2933, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:38:24,348 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 85 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:24,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 117 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-04-06 20:38:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 385. [2022-04-06 20:38:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.3236842105263158) internal successors, (503), 380 states have internal predecessors, (503), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 507 transitions. [2022-04-06 20:38:24,508 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 507 transitions. Word has length 38 [2022-04-06 20:38:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:24,508 INFO L478 AbstractCegarLoop]: Abstraction has 385 states and 507 transitions. [2022-04-06 20:38:24,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 507 transitions. [2022-04-06 20:38:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:38:24,509 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:24,509 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:24,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:24,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-04-06 20:38:24,727 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1286566156, now seen corresponding path program 27 times [2022-04-06 20:38:24,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:24,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133480776] [2022-04-06 20:38:24,728 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:24,728 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1286566156, now seen corresponding path program 28 times [2022-04-06 20:38:24,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440638840] [2022-04-06 20:38:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:24,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 20:38:24,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:24,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440638840] [2022-04-06 20:38:24,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440638840] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:24,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336896835] [2022-04-06 20:38:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:24,899 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:24,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:38:24,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:24,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:24,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:38:24,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 20:38:25,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 20:38:25,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336896835] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:25,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:25,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:38:25,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:25,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [133480776] [2022-04-06 20:38:25,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [133480776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:25,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:25,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:38:25,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157361363] [2022-04-06 20:38:25,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:25,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:38:25,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:38:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:38:25,305 INFO L87 Difference]: Start difference. First operand 385 states and 507 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:26,626 INFO L93 Difference]: Finished difference Result 593 states and 760 transitions. [2022-04-06 20:38:26,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:38:26,626 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:38:26,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:26,628 INFO L225 Difference]: With dead ends: 593 [2022-04-06 20:38:26,628 INFO L226 Difference]: Without dead ends: 574 [2022-04-06 20:38:26,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=426, Invalid=1644, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:38:26,629 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 97 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:26,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 120 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-04-06 20:38:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 385. [2022-04-06 20:38:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.3210526315789475) internal successors, (502), 380 states have internal predecessors, (502), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 506 transitions. [2022-04-06 20:38:26,793 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 506 transitions. Word has length 38 [2022-04-06 20:38:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:26,794 INFO L478 AbstractCegarLoop]: Abstraction has 385 states and 506 transitions. [2022-04-06 20:38:26,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 506 transitions. [2022-04-06 20:38:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:38:26,795 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:26,795 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:26,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 20:38:26,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-04-06 20:38:26,995 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:26,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1857399070, now seen corresponding path program 29 times [2022-04-06 20:38:26,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:26,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1146939975] [2022-04-06 20:38:26,996 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:26,996 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:26,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1857399070, now seen corresponding path program 30 times [2022-04-06 20:38:26,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:26,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098657839] [2022-04-06 20:38:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:26,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:27,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:38:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098657839] [2022-04-06 20:38:27,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098657839] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571817205] [2022-04-06 20:38:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:27,162 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:27,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:38:27,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:38:27,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:38:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:38:27,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:38:27,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571817205] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:27,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:27,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 22 [2022-04-06 20:38:27,429 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:27,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1146939975] [2022-04-06 20:38:27,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1146939975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:27,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:27,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:38:27,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611636270] [2022-04-06 20:38:27,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:27,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:38:27,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:38:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:38:27,430 INFO L87 Difference]: Start difference. First operand 385 states and 506 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:28,887 INFO L93 Difference]: Finished difference Result 625 states and 796 transitions. [2022-04-06 20:38:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:38:28,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:38:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:28,889 INFO L225 Difference]: With dead ends: 625 [2022-04-06 20:38:28,889 INFO L226 Difference]: Without dead ends: 606 [2022-04-06 20:38:28,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:38:28,890 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 111 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:28,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 133 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-04-06 20:38:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 385. [2022-04-06 20:38:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.318421052631579) internal successors, (501), 380 states have internal predecessors, (501), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 505 transitions. [2022-04-06 20:38:29,055 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 505 transitions. Word has length 38 [2022-04-06 20:38:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:29,055 INFO L478 AbstractCegarLoop]: Abstraction has 385 states and 505 transitions. [2022-04-06 20:38:29,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 505 transitions. [2022-04-06 20:38:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:38:29,056 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:29,056 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:29,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-06 20:38:29,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:29,257 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2143864094, now seen corresponding path program 43 times [2022-04-06 20:38:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:29,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [200346778] [2022-04-06 20:38:29,258 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:29,258 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2143864094, now seen corresponding path program 44 times [2022-04-06 20:38:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:29,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919074977] [2022-04-06 20:38:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:29,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:29,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:29,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:29,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919074977] [2022-04-06 20:38:29,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919074977] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:29,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173233732] [2022-04-06 20:38:29,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:29,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:29,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:29,670 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:29,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:38:29,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:29,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:29,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:38:29,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:29,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:30,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173233732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:30,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:30,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:38:30,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:30,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [200346778] [2022-04-06 20:38:30,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [200346778] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:30,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:30,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:38:30,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746592931] [2022-04-06 20:38:30,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:30,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:38:30,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:30,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:38:30,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:38:30,677 INFO L87 Difference]: Start difference. First operand 385 states and 505 transitions. Second operand has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:34,431 INFO L93 Difference]: Finished difference Result 905 states and 1291 transitions. [2022-04-06 20:38:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:38:34,431 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:38:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:34,433 INFO L225 Difference]: With dead ends: 905 [2022-04-06 20:38:34,433 INFO L226 Difference]: Without dead ends: 868 [2022-04-06 20:38:34,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1282, Invalid=4418, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:38:34,434 INFO L913 BasicCegarLoop]: 154 mSDtfsCounter, 249 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 5569 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 5696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 5569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:34,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 276 Invalid, 5696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 5569 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:38:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-04-06 20:38:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 400. [2022-04-06 20:38:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.3240506329113924) internal successors, (523), 395 states have internal predecessors, (523), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 527 transitions. [2022-04-06 20:38:34,605 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 527 transitions. Word has length 38 [2022-04-06 20:38:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:34,605 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 527 transitions. [2022-04-06 20:38:34,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 527 transitions. [2022-04-06 20:38:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:38:34,606 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:34,606 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:34,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 20:38:34,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:34,823 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2045746160, now seen corresponding path program 27 times [2022-04-06 20:38:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1323749783] [2022-04-06 20:38:34,824 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:34,824 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:34,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2045746160, now seen corresponding path program 28 times [2022-04-06 20:38:34,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373465783] [2022-04-06 20:38:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:34,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:35,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:38:35,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:35,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373465783] [2022-04-06 20:38:35,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373465783] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:35,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181454519] [2022-04-06 20:38:35,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:35,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:35,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:35,051 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:35,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:38:35,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:35,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:35,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:38:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:38:35,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:38:35,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181454519] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:35,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:35,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-04-06 20:38:35,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1323749783] [2022-04-06 20:38:35,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1323749783] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:35,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:35,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:38:35,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021868476] [2022-04-06 20:38:35,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:35,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:38:35,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:35,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:38:35,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:38:35,351 INFO L87 Difference]: Start difference. First operand 400 states and 527 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:37,106 INFO L93 Difference]: Finished difference Result 547 states and 716 transitions. [2022-04-06 20:38:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:38:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:38:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:37,108 INFO L225 Difference]: With dead ends: 547 [2022-04-06 20:38:37,108 INFO L226 Difference]: Without dead ends: 531 [2022-04-06 20:38:37,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=3610, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:38:37,109 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 84 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:37,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 112 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-04-06 20:38:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 401. [2022-04-06 20:38:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.3232323232323233) internal successors, (524), 396 states have internal predecessors, (524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 528 transitions. [2022-04-06 20:38:37,279 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 528 transitions. Word has length 39 [2022-04-06 20:38:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:37,279 INFO L478 AbstractCegarLoop]: Abstraction has 401 states and 528 transitions. [2022-04-06 20:38:37,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 528 transitions. [2022-04-06 20:38:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:38:37,280 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:37,280 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:37,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 20:38:37,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 20:38:37,481 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash 405780527, now seen corresponding path program 45 times [2022-04-06 20:38:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:37,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [158543074] [2022-04-06 20:38:37,482 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:37,482 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash 405780527, now seen corresponding path program 46 times [2022-04-06 20:38:37,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:37,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003659387] [2022-04-06 20:38:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:37,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:37,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:37,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003659387] [2022-04-06 20:38:37,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003659387] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:37,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863524143] [2022-04-06 20:38:37,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:37,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:37,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:37,875 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:37,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:38:37,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:37,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:37,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:38:37,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:38,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:38,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863524143] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:38,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:38,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:38:38,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:38,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [158543074] [2022-04-06 20:38:38,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [158543074] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:38,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:38,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:38:38,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609700883] [2022-04-06 20:38:38,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:38,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:38:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:38,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:38:38,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:38:38,903 INFO L87 Difference]: Start difference. First operand 401 states and 528 transitions. Second operand has 28 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:43,026 INFO L93 Difference]: Finished difference Result 941 states and 1345 transitions. [2022-04-06 20:38:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:38:43,026 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:38:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:43,028 INFO L225 Difference]: With dead ends: 941 [2022-04-06 20:38:43,029 INFO L226 Difference]: Without dead ends: 904 [2022-04-06 20:38:43,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1385, Invalid=4777, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:38:43,029 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 265 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 6074 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 6210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 6074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:43,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 288 Invalid, 6210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 6074 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:38:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-04-06 20:38:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 416. [2022-04-06 20:38:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 411 states have (on average 1.3284671532846715) internal successors, (546), 411 states have internal predecessors, (546), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 550 transitions. [2022-04-06 20:38:43,223 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 550 transitions. Word has length 39 [2022-04-06 20:38:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:43,223 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 550 transitions. [2022-04-06 20:38:43,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 550 transitions. [2022-04-06 20:38:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:43,224 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:43,224 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:43,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:43,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 20:38:43,424 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash -236102046, now seen corresponding path program 11 times [2022-04-06 20:38:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:43,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [956248295] [2022-04-06 20:38:43,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:43,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash -236102046, now seen corresponding path program 12 times [2022-04-06 20:38:43,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:43,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959823013] [2022-04-06 20:38:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:43,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:43,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:43,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959823013] [2022-04-06 20:38:43,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959823013] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913357294] [2022-04-06 20:38:43,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:43,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:43,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:43,586 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:43,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:38:43,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:38:43,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:38:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:43,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:43,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913357294] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:43,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:43,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2022-04-06 20:38:43,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:43,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [956248295] [2022-04-06 20:38:43,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [956248295] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:43,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:43,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:38:43,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466267734] [2022-04-06 20:38:43,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:43,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:38:43,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:43,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:38:43,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:38:43,932 INFO L87 Difference]: Start difference. First operand 416 states and 550 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:46,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 20:38:47,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:47,063 INFO L93 Difference]: Finished difference Result 535 states and 730 transitions. [2022-04-06 20:38:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:38:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:38:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:47,065 INFO L225 Difference]: With dead ends: 535 [2022-04-06 20:38:47,065 INFO L226 Difference]: Without dead ends: 522 [2022-04-06 20:38:47,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:38:47,065 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 66 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:47,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 98 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 581 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:38:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-04-06 20:38:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 466. [2022-04-06 20:38:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 461 states have (on average 1.331887201735358) internal successors, (614), 461 states have internal predecessors, (614), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 618 transitions. [2022-04-06 20:38:47,304 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 618 transitions. Word has length 40 [2022-04-06 20:38:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:47,304 INFO L478 AbstractCegarLoop]: Abstraction has 466 states and 618 transitions. [2022-04-06 20:38:47,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 618 transitions. [2022-04-06 20:38:47,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:47,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:47,305 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:47,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 20:38:47,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:47,506 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:47,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:47,506 INFO L85 PathProgramCache]: Analyzing trace with hash -559628798, now seen corresponding path program 29 times [2022-04-06 20:38:47,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:47,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [997427100] [2022-04-06 20:38:47,507 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:47,507 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash -559628798, now seen corresponding path program 30 times [2022-04-06 20:38:47,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:47,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97878191] [2022-04-06 20:38:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:47,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:47,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:47,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97878191] [2022-04-06 20:38:47,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97878191] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548640198] [2022-04-06 20:38:47,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:47,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:47,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:47,814 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:47,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:38:47,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:38:47,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:47,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:38:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:38:48,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:38:48,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548640198] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:48,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:48,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 31 [2022-04-06 20:38:48,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:48,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [997427100] [2022-04-06 20:38:48,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [997427100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:48,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:48,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:38:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685134237] [2022-04-06 20:38:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:48,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:38:48,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:38:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:38:48,251 INFO L87 Difference]: Start difference. First operand 466 states and 618 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:52,507 INFO L93 Difference]: Finished difference Result 691 states and 961 transitions. [2022-04-06 20:38:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 20:38:52,507 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:38:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:52,509 INFO L225 Difference]: With dead ends: 691 [2022-04-06 20:38:52,509 INFO L226 Difference]: Without dead ends: 674 [2022-04-06 20:38:52,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4770 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=709, Invalid=16061, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:38:52,510 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 132 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 3984 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 4397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 3984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:52,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 141 Invalid, 4397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 3984 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:38:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-04-06 20:38:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 477. [2022-04-06 20:38:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 472 states have (on average 1.3241525423728813) internal successors, (625), 472 states have internal predecessors, (625), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 629 transitions. [2022-04-06 20:38:52,750 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 629 transitions. Word has length 40 [2022-04-06 20:38:52,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:52,750 INFO L478 AbstractCegarLoop]: Abstraction has 477 states and 629 transitions. [2022-04-06 20:38:52,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 629 transitions. [2022-04-06 20:38:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:52,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:52,751 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:52,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 20:38:52,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:38:52,954 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:52,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:52,954 INFO L85 PathProgramCache]: Analyzing trace with hash -286560430, now seen corresponding path program 31 times [2022-04-06 20:38:52,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:52,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2086787794] [2022-04-06 20:38:52,955 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:52,955 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash -286560430, now seen corresponding path program 32 times [2022-04-06 20:38:52,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:52,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131849927] [2022-04-06 20:38:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:52,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:53,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 20:38:53,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:53,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131849927] [2022-04-06 20:38:53,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131849927] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403274996] [2022-04-06 20:38:53,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:53,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:53,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:53,142 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:53,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:38:53,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:53,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:53,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:38:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:38:53,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:38:53,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403274996] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:53,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:53,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 44 [2022-04-06 20:38:53,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:53,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2086787794] [2022-04-06 20:38:53,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2086787794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:53,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:53,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:38:53,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133948849] [2022-04-06 20:38:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:53,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:38:53,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:38:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1596, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:38:53,871 INFO L87 Difference]: Start difference. First operand 477 states and 629 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:55,681 INFO L93 Difference]: Finished difference Result 702 states and 903 transitions. [2022-04-06 20:38:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:38:55,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:38:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:55,683 INFO L225 Difference]: With dead ends: 702 [2022-04-06 20:38:55,683 INFO L226 Difference]: Without dead ends: 682 [2022-04-06 20:38:55,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=672, Invalid=3360, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:38:55,684 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 99 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:55,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 124 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:55,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-04-06 20:38:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 477. [2022-04-06 20:38:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 472 states have (on average 1.3220338983050848) internal successors, (624), 472 states have internal predecessors, (624), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 628 transitions. [2022-04-06 20:38:55,927 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 628 transitions. Word has length 40 [2022-04-06 20:38:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:55,927 INFO L478 AbstractCegarLoop]: Abstraction has 477 states and 628 transitions. [2022-04-06 20:38:55,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:55,927 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 628 transitions. [2022-04-06 20:38:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:55,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:55,928 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:55,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-04-06 20:38:56,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:56,129 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:56,129 INFO L85 PathProgramCache]: Analyzing trace with hash -727872510, now seen corresponding path program 33 times [2022-04-06 20:38:56,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:56,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [355352511] [2022-04-06 20:38:56,130 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:56,130 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash -727872510, now seen corresponding path program 34 times [2022-04-06 20:38:56,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:56,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681598510] [2022-04-06 20:38:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:56,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:56,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:38:56,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:56,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681598510] [2022-04-06 20:38:56,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681598510] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:56,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464354546] [2022-04-06 20:38:56,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:56,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:56,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:56,287 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:56,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:38:56,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:56,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:56,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:38:56,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:38:56,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:38:56,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464354546] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:56,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:56,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:38:56,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:56,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [355352511] [2022-04-06 20:38:56,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [355352511] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:56,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:56,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:38:56,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194438756] [2022-04-06 20:38:56,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:56,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:38:56,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:38:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:38:56,718 INFO L87 Difference]: Start difference. First operand 477 states and 628 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:58,618 INFO L93 Difference]: Finished difference Result 737 states and 943 transitions. [2022-04-06 20:38:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:38:58,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:38:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:58,620 INFO L225 Difference]: With dead ends: 737 [2022-04-06 20:38:58,620 INFO L226 Difference]: Without dead ends: 717 [2022-04-06 20:38:58,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:38:58,621 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 110 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:58,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 142 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-04-06 20:38:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 477. [2022-04-06 20:38:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 472 states have (on average 1.319915254237288) internal successors, (623), 472 states have internal predecessors, (623), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 627 transitions. [2022-04-06 20:38:58,864 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 627 transitions. Word has length 40 [2022-04-06 20:38:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:58,864 INFO L478 AbstractCegarLoop]: Abstraction has 477 states and 627 transitions. [2022-04-06 20:38:58,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 627 transitions. [2022-04-06 20:38:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:58,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:58,865 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:58,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:59,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:59,066 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:59,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash 920459602, now seen corresponding path program 35 times [2022-04-06 20:38:59,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:59,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082337626] [2022-04-06 20:38:59,067 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:59,067 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash 920459602, now seen corresponding path program 36 times [2022-04-06 20:38:59,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:59,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856129957] [2022-04-06 20:38:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:59,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:59,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:38:59,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:59,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856129957] [2022-04-06 20:38:59,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856129957] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:59,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058893076] [2022-04-06 20:38:59,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:59,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:59,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:59,233 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:59,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:38:59,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:38:59,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:59,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:38:59,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:38:59,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:38:59,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058893076] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:59,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:59,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2022-04-06 20:38:59,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2082337626] [2022-04-06 20:38:59,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2082337626] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:59,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:59,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:38:59,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444917351] [2022-04-06 20:38:59,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:59,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:38:59,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:59,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:38:59,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:38:59,583 INFO L87 Difference]: Start difference. First operand 477 states and 627 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:01,653 INFO L93 Difference]: Finished difference Result 773 states and 984 transitions. [2022-04-06 20:39:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:39:01,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:39:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:01,655 INFO L225 Difference]: With dead ends: 773 [2022-04-06 20:39:01,655 INFO L226 Difference]: Without dead ends: 753 [2022-04-06 20:39:01,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:39:01,655 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 125 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:01,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 145 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-04-06 20:39:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 477. [2022-04-06 20:39:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 472 states have (on average 1.3177966101694916) internal successors, (622), 472 states have internal predecessors, (622), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 626 transitions. [2022-04-06 20:39:01,910 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 626 transitions. Word has length 40 [2022-04-06 20:39:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:01,911 INFO L478 AbstractCegarLoop]: Abstraction has 477 states and 626 transitions. [2022-04-06 20:39:01,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 626 transitions. [2022-04-06 20:39:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:39:01,911 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:01,912 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:01,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-06 20:39:02,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-04-06 20:39:02,115 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:02,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2135352450, now seen corresponding path program 47 times [2022-04-06 20:39:02,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:02,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2071671220] [2022-04-06 20:39:02,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:02,116 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2135352450, now seen corresponding path program 48 times [2022-04-06 20:39:02,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:02,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339937649] [2022-04-06 20:39:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:02,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:02,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:02,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:02,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339937649] [2022-04-06 20:39:02,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339937649] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:02,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141306366] [2022-04-06 20:39:02,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:02,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:02,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:02,583 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:02,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:39:03,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 20:39:03,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:03,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:39:03,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:03,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:04,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141306366] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:04,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:04,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:39:04,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:04,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2071671220] [2022-04-06 20:39:04,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2071671220] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:04,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:04,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:39:04,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476390707] [2022-04-06 20:39:04,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:04,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:39:04,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:04,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:39:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=2344, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:39:04,205 INFO L87 Difference]: Start difference. First operand 477 states and 626 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:09,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:09,243 INFO L93 Difference]: Finished difference Result 1116 states and 1599 transitions. [2022-04-06 20:39:09,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:39:09,243 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:39:09,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:09,246 INFO L225 Difference]: With dead ends: 1116 [2022-04-06 20:39:09,246 INFO L226 Difference]: Without dead ends: 1076 [2022-04-06 20:39:09,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1492, Invalid=5150, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:39:09,247 INFO L913 BasicCegarLoop]: 168 mSDtfsCounter, 276 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6602 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 6742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 6602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:09,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 300 Invalid, 6742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 6602 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:39:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-04-06 20:39:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 494. [2022-04-06 20:39:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 489 states have (on average 1.3231083844580778) internal successors, (647), 489 states have internal predecessors, (647), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 651 transitions. [2022-04-06 20:39:09,520 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 651 transitions. Word has length 40 [2022-04-06 20:39:09,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:09,521 INFO L478 AbstractCegarLoop]: Abstraction has 494 states and 651 transitions. [2022-04-06 20:39:09,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 651 transitions. [2022-04-06 20:39:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:39:09,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:09,521 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:09,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:09,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:09,722 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:09,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:09,722 INFO L85 PathProgramCache]: Analyzing trace with hash -264974095, now seen corresponding path program 13 times [2022-04-06 20:39:09,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:09,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1338566552] [2022-04-06 20:39:09,723 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:09,723 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash -264974095, now seen corresponding path program 14 times [2022-04-06 20:39:09,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:09,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720238791] [2022-04-06 20:39:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:09,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:10,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:39:10,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:10,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720238791] [2022-04-06 20:39:10,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720238791] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:10,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026478625] [2022-04-06 20:39:10,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:10,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:10,172 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:10,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:39:10,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:10,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:10,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:39:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:39:10,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:39:10,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026478625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:10,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:10,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 29 [2022-04-06 20:39:10,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:10,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1338566552] [2022-04-06 20:39:10,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1338566552] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:10,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:10,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:39:10,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221165343] [2022-04-06 20:39:10,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:10,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:39:10,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:10,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:39:10,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:39:10,851 INFO L87 Difference]: Start difference. First operand 494 states and 651 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:11,886 INFO L93 Difference]: Finished difference Result 506 states and 663 transitions. [2022-04-06 20:39:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:39:11,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:39:11,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:11,888 INFO L225 Difference]: With dead ends: 506 [2022-04-06 20:39:11,888 INFO L226 Difference]: Without dead ends: 495 [2022-04-06 20:39:11,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 17 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:39:11,889 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:11,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 61 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-04-06 20:39:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2022-04-06 20:39:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 490 states have (on average 1.3224489795918368) internal successors, (648), 490 states have internal predecessors, (648), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 652 transitions. [2022-04-06 20:39:12,276 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 652 transitions. Word has length 41 [2022-04-06 20:39:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:12,276 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 652 transitions. [2022-04-06 20:39:12,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 652 transitions. [2022-04-06 20:39:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:39:12,277 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:12,277 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:12,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:12,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:12,498 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:12,498 INFO L85 PathProgramCache]: Analyzing trace with hash 763864160, now seen corresponding path program 31 times [2022-04-06 20:39:12,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:12,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907371440] [2022-04-06 20:39:12,499 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:12,499 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash 763864160, now seen corresponding path program 32 times [2022-04-06 20:39:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:12,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270640049] [2022-04-06 20:39:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:12,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:12,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:39:12,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270640049] [2022-04-06 20:39:12,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270640049] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690480626] [2022-04-06 20:39:12,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:12,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:12,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:12,771 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:12,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:39:12,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:12,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:39:12,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 20:39:13,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 20:39:13,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690480626] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:13,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:13,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 10] total 29 [2022-04-06 20:39:13,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:13,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907371440] [2022-04-06 20:39:13,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907371440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:13,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:13,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:39:13,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394999571] [2022-04-06 20:39:13,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:13,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:39:13,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:39:13,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:39:13,139 INFO L87 Difference]: Start difference. First operand 495 states and 652 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:15,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:15,393 INFO L93 Difference]: Finished difference Result 712 states and 919 transitions. [2022-04-06 20:39:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:39:15,393 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:39:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:15,395 INFO L225 Difference]: With dead ends: 712 [2022-04-06 20:39:15,395 INFO L226 Difference]: Without dead ends: 654 [2022-04-06 20:39:15,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=4360, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:39:15,396 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 95 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:15,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 118 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-04-06 20:39:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 496. [2022-04-06 20:39:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 491 states have (on average 1.3156822810590632) internal successors, (646), 491 states have internal predecessors, (646), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 650 transitions. [2022-04-06 20:39:15,657 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 650 transitions. Word has length 41 [2022-04-06 20:39:15,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:15,657 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 650 transitions. [2022-04-06 20:39:15,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:15,657 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 650 transitions. [2022-04-06 20:39:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:39:15,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:15,658 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:15,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:15,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:15,858 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash -82492785, now seen corresponding path program 49 times [2022-04-06 20:39:15,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:15,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1701196612] [2022-04-06 20:39:15,859 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:15,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash -82492785, now seen corresponding path program 50 times [2022-04-06 20:39:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:15,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239989673] [2022-04-06 20:39:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:15,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:16,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:16,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239989673] [2022-04-06 20:39:16,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239989673] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484260463] [2022-04-06 20:39:16,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:16,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:16,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:16,271 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:16,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:39:16,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:16,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:16,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:39:16,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:16,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:17,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484260463] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:17,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:17,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:39:17,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:17,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1701196612] [2022-04-06 20:39:17,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1701196612] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:17,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:17,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:39:17,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290895824] [2022-04-06 20:39:17,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:17,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:39:17,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:17,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:39:17,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=2515, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:39:17,436 INFO L87 Difference]: Start difference. First operand 496 states and 650 transitions. Second operand has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 29 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:22,882 INFO L93 Difference]: Finished difference Result 1157 states and 1657 transitions. [2022-04-06 20:39:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:39:22,882 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 29 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:39:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:22,884 INFO L225 Difference]: With dead ends: 1157 [2022-04-06 20:39:22,885 INFO L226 Difference]: Without dead ends: 1117 [2022-04-06 20:39:22,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1603, Invalid=5537, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:39:22,885 INFO L913 BasicCegarLoop]: 175 mSDtfsCounter, 292 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 7152 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 7301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 7152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:22,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 312 Invalid, 7301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 7152 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:39:22,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-04-06 20:39:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 513. [2022-04-06 20:39:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 508 states have (on average 1.3208661417322836) internal successors, (671), 508 states have internal predecessors, (671), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 675 transitions. [2022-04-06 20:39:23,158 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 675 transitions. Word has length 41 [2022-04-06 20:39:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:23,158 INFO L478 AbstractCegarLoop]: Abstraction has 513 states and 675 transitions. [2022-04-06 20:39:23,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 29 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 675 transitions. [2022-04-06 20:39:23,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:39:23,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:23,159 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:23,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:23,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 20:39:23,359 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:23,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:23,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1741037917, now seen corresponding path program 15 times [2022-04-06 20:39:23,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:23,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1717385564] [2022-04-06 20:39:23,360 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:23,360 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1741037917, now seen corresponding path program 16 times [2022-04-06 20:39:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:23,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030904255] [2022-04-06 20:39:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:23,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:39:23,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:23,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030904255] [2022-04-06 20:39:23,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030904255] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:23,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082162787] [2022-04-06 20:39:23,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:23,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:23,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:23,441 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:23,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:39:23,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:23,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:39:23,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:39:23,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:39:23,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082162787] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:23,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:23,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-04-06 20:39:23,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:23,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1717385564] [2022-04-06 20:39:23,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1717385564] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:23,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:23,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:39:23,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269019210] [2022-04-06 20:39:23,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:23,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:39:23,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:39:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:39:23,612 INFO L87 Difference]: Start difference. First operand 513 states and 675 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:24,281 INFO L93 Difference]: Finished difference Result 564 states and 736 transitions. [2022-04-06 20:39:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:39:24,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:39:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:24,283 INFO L225 Difference]: With dead ends: 564 [2022-04-06 20:39:24,283 INFO L226 Difference]: Without dead ends: 530 [2022-04-06 20:39:24,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:39:24,283 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:24,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 75 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:39:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-04-06 20:39:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 495. [2022-04-06 20:39:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 490 states have (on average 1.3285714285714285) internal successors, (651), 490 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 655 transitions. [2022-04-06 20:39:24,540 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 655 transitions. Word has length 42 [2022-04-06 20:39:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:24,540 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 655 transitions. [2022-04-06 20:39:24,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 655 transitions. [2022-04-06 20:39:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:39:24,541 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:24,541 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:24,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-04-06 20:39:24,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:24,741 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:24,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1772981812, now seen corresponding path program 33 times [2022-04-06 20:39:24,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:24,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [528063216] [2022-04-06 20:39:24,742 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:24,742 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:24,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1772981812, now seen corresponding path program 34 times [2022-04-06 20:39:24,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:24,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80701871] [2022-04-06 20:39:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:24,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:24,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:39:24,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:24,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80701871] [2022-04-06 20:39:24,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80701871] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:24,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61467083] [2022-04-06 20:39:24,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:24,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:24,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:24,990 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:24,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:39:25,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:25,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:25,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:39:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:39:25,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:39:25,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61467083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:25,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:25,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 31 [2022-04-06 20:39:25,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:25,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [528063216] [2022-04-06 20:39:25,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [528063216] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:25,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:25,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:39:25,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757063456] [2022-04-06 20:39:25,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:25,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:39:25,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:25,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:39:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:39:25,388 INFO L87 Difference]: Start difference. First operand 495 states and 655 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:27,835 INFO L93 Difference]: Finished difference Result 667 states and 873 transitions. [2022-04-06 20:39:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:39:27,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:39:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:27,836 INFO L225 Difference]: With dead ends: 667 [2022-04-06 20:39:27,836 INFO L226 Difference]: Without dead ends: 650 [2022-04-06 20:39:27,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=4631, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:39:27,837 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 86 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:27,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 141 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-04-06 20:39:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 496. [2022-04-06 20:39:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 491 states have (on average 1.3279022403258656) internal successors, (652), 491 states have internal predecessors, (652), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 656 transitions. [2022-04-06 20:39:28,099 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 656 transitions. Word has length 42 [2022-04-06 20:39:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:28,099 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 656 transitions. [2022-04-06 20:39:28,099 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 656 transitions. [2022-04-06 20:39:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:39:28,100 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:28,100 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:28,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 20:39:28,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:28,300 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:28,301 INFO L85 PathProgramCache]: Analyzing trace with hash 70932066, now seen corresponding path program 37 times [2022-04-06 20:39:28,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:28,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [911008069] [2022-04-06 20:39:28,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:28,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:28,301 INFO L85 PathProgramCache]: Analyzing trace with hash 70932066, now seen corresponding path program 38 times [2022-04-06 20:39:28,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:28,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609763341] [2022-04-06 20:39:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:28,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:28,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:39:28,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:28,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609763341] [2022-04-06 20:39:28,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609763341] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:28,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123959428] [2022-04-06 20:39:28,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:28,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:28,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:28,470 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:28,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:39:28,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:28,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:39:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:39:28,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:39:29,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123959428] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:29,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:29,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 24] total 48 [2022-04-06 20:39:29,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:29,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [911008069] [2022-04-06 20:39:29,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [911008069] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:29,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:29,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:39:29,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688119121] [2022-04-06 20:39:29,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:29,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:39:29,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:39:29,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:39:29,333 INFO L87 Difference]: Start difference. First operand 496 states and 656 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:31,469 INFO L93 Difference]: Finished difference Result 737 states and 946 transitions. [2022-04-06 20:39:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:39:31,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:39:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:31,470 INFO L225 Difference]: With dead ends: 737 [2022-04-06 20:39:31,470 INFO L226 Difference]: Without dead ends: 716 [2022-04-06 20:39:31,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=764, Invalid=3928, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:39:31,470 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 101 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:31,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 138 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-04-06 20:39:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 496. [2022-04-06 20:39:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 491 states have (on average 1.3258655804480652) internal successors, (651), 491 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 655 transitions. [2022-04-06 20:39:31,730 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 655 transitions. Word has length 42 [2022-04-06 20:39:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:31,730 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 655 transitions. [2022-04-06 20:39:31,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 655 transitions. [2022-04-06 20:39:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:39:31,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:31,731 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:31,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 20:39:31,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-04-06 20:39:31,931 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1943431156, now seen corresponding path program 39 times [2022-04-06 20:39:31,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:31,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [839685286] [2022-04-06 20:39:31,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:31,932 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1943431156, now seen corresponding path program 40 times [2022-04-06 20:39:31,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:31,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988425798] [2022-04-06 20:39:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:31,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:32,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 20:39:32,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:32,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988425798] [2022-04-06 20:39:32,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988425798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:32,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264726792] [2022-04-06 20:39:32,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:32,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:32,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:32,144 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:32,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:39:32,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:32,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:32,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:39:32,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 20:39:32,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 20:39:32,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264726792] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:32,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:32,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:39:32,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:32,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [839685286] [2022-04-06 20:39:32,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [839685286] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:32,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:32,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:39:32,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536948815] [2022-04-06 20:39:32,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:32,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:39:32,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:32,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:39:32,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:39:32,613 INFO L87 Difference]: Start difference. First operand 496 states and 655 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:34,822 INFO L93 Difference]: Finished difference Result 772 states and 985 transitions. [2022-04-06 20:39:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:39:34,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:39:34,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:34,823 INFO L225 Difference]: With dead ends: 772 [2022-04-06 20:39:34,823 INFO L226 Difference]: Without dead ends: 751 [2022-04-06 20:39:34,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=542, Invalid=2110, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:39:34,824 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 112 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:34,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 151 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:34,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-04-06 20:39:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 496. [2022-04-06 20:39:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 491 states have (on average 1.3238289205702647) internal successors, (650), 491 states have internal predecessors, (650), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 654 transitions. [2022-04-06 20:39:35,086 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 654 transitions. Word has length 42 [2022-04-06 20:39:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:35,086 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 654 transitions. [2022-04-06 20:39:35,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 654 transitions. [2022-04-06 20:39:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:39:35,087 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:35,087 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:35,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:35,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:35,311 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash -628564958, now seen corresponding path program 41 times [2022-04-06 20:39:35,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:35,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [539262102] [2022-04-06 20:39:35,313 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:35,313 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:35,313 INFO L85 PathProgramCache]: Analyzing trace with hash -628564958, now seen corresponding path program 42 times [2022-04-06 20:39:35,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:35,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876718685] [2022-04-06 20:39:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:35,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:35,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:39:35,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:35,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876718685] [2022-04-06 20:39:35,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876718685] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:35,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528503075] [2022-04-06 20:39:35,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:35,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:35,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:35,533 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:35,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:39:35,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:39:35,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:35,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:39:35,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-04-06 20:39:35,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-04-06 20:39:35,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528503075] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:35,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:35,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 24 [2022-04-06 20:39:35,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:35,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [539262102] [2022-04-06 20:39:35,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [539262102] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:35,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:35,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:39:35,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426785910] [2022-04-06 20:39:35,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:35,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:39:35,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:35,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:39:35,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:39:35,801 INFO L87 Difference]: Start difference. First operand 496 states and 654 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:38,208 INFO L93 Difference]: Finished difference Result 808 states and 1025 transitions. [2022-04-06 20:39:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:39:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:39:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:38,210 INFO L225 Difference]: With dead ends: 808 [2022-04-06 20:39:38,210 INFO L226 Difference]: Without dead ends: 787 [2022-04-06 20:39:38,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=1419, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:39:38,210 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 127 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:38,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 159 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-04-06 20:39:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 496. [2022-04-06 20:39:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 491 states have (on average 1.3217922606924644) internal successors, (649), 491 states have internal predecessors, (649), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 653 transitions. [2022-04-06 20:39:38,479 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 653 transitions. Word has length 42 [2022-04-06 20:39:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:38,479 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 653 transitions. [2022-04-06 20:39:38,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 653 transitions. [2022-04-06 20:39:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:39:38,480 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:38,480 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:38,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-06 20:39:38,681 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:38,681 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:38,681 INFO L85 PathProgramCache]: Analyzing trace with hash -116218334, now seen corresponding path program 51 times [2022-04-06 20:39:38,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:38,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1296328275] [2022-04-06 20:39:38,682 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:38,682 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:38,682 INFO L85 PathProgramCache]: Analyzing trace with hash -116218334, now seen corresponding path program 52 times [2022-04-06 20:39:38,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:38,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759101884] [2022-04-06 20:39:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:38,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:39,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:39,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759101884] [2022-04-06 20:39:39,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759101884] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624267427] [2022-04-06 20:39:39,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:39,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:39,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:39,137 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:39,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:39:39,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:39,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:39,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:39:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:39,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:40,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624267427] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:40,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:40,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:39:40,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:40,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1296328275] [2022-04-06 20:39:40,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1296328275] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:40,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:40,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:39:40,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852064902] [2022-04-06 20:39:40,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:40,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:39:40,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:40,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:39:40,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=848, Invalid=2692, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:39:40,366 INFO L87 Difference]: Start difference. First operand 496 states and 653 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:46,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:46,156 INFO L93 Difference]: Finished difference Result 1162 states and 1657 transitions. [2022-04-06 20:39:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:39:46,157 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:39:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:46,158 INFO L225 Difference]: With dead ends: 1162 [2022-04-06 20:39:46,158 INFO L226 Difference]: Without dead ends: 1120 [2022-04-06 20:39:46,158 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1718, Invalid=5938, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:39:46,159 INFO L913 BasicCegarLoop]: 179 mSDtfsCounter, 287 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 7616 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 7764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 7616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:46,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 321 Invalid, 7764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 7616 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:39:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-04-06 20:39:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 513. [2022-04-06 20:39:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 508 states have (on average 1.3267716535433072) internal successors, (674), 508 states have internal predecessors, (674), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 678 transitions. [2022-04-06 20:39:46,430 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 678 transitions. Word has length 42 [2022-04-06 20:39:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:46,430 INFO L478 AbstractCegarLoop]: Abstraction has 513 states and 678 transitions. [2022-04-06 20:39:46,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 678 transitions. [2022-04-06 20:39:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:39:46,431 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:46,431 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:46,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-06 20:39:46,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:46,635 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:46,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:46,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1304109344, now seen corresponding path program 35 times [2022-04-06 20:39:46,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:46,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [458408914] [2022-04-06 20:39:46,636 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:46,636 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1304109344, now seen corresponding path program 36 times [2022-04-06 20:39:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:46,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788203000] [2022-04-06 20:39:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:46,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:46,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:46,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:46,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788203000] [2022-04-06 20:39:46,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788203000] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:46,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283411686] [2022-04-06 20:39:46,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:46,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:46,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:46,926 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:46,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:39:47,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:39:47,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:47,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:39:47,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:39:47,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:39:47,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283411686] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:47,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:47,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12, 12] total 44 [2022-04-06 20:39:47,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:47,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [458408914] [2022-04-06 20:39:47,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [458408914] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:47,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:47,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:39:47,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472446601] [2022-04-06 20:39:47,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:47,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:39:47,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:47,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:39:47,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1707, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:39:47,684 INFO L87 Difference]: Start difference. First operand 513 states and 678 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:53,964 INFO L93 Difference]: Finished difference Result 788 states and 1100 transitions. [2022-04-06 20:39:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-04-06 20:39:53,964 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:39:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:53,966 INFO L225 Difference]: With dead ends: 788 [2022-04-06 20:39:53,966 INFO L226 Difference]: Without dead ends: 770 [2022-04-06 20:39:53,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7061 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=976, Invalid=25756, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 20:39:53,967 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 161 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 5243 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 5768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 5243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:53,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 161 Invalid, 5768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 5243 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:39:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-04-06 20:39:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 525. [2022-04-06 20:39:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 520 states have (on average 1.3192307692307692) internal successors, (686), 520 states have internal predecessors, (686), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 690 transitions. [2022-04-06 20:39:54,273 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 690 transitions. Word has length 43 [2022-04-06 20:39:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:54,274 INFO L478 AbstractCegarLoop]: Abstraction has 525 states and 690 transitions. [2022-04-06 20:39:54,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 690 transitions. [2022-04-06 20:39:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:39:54,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:54,275 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:54,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-06 20:39:54,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 20:39:54,483 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:54,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1160175920, now seen corresponding path program 37 times [2022-04-06 20:39:54,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:54,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1019316045] [2022-04-06 20:39:54,484 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:54,484 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:54,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1160175920, now seen corresponding path program 38 times [2022-04-06 20:39:54,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:54,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65905374] [2022-04-06 20:39:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:54,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:54,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:39:54,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:54,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65905374] [2022-04-06 20:39:54,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65905374] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:54,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183169565] [2022-04-06 20:39:54,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:54,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:54,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:54,782 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:54,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:39:54,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:54,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:39:54,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:39:55,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:39:55,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183169565] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:55,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:55,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 30 [2022-04-06 20:39:55,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:55,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1019316045] [2022-04-06 20:39:55,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1019316045] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:55,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:55,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:39:55,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943968887] [2022-04-06 20:39:55,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:55,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:39:55,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:55,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:39:55,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:39:55,119 INFO L87 Difference]: Start difference. First operand 525 states and 690 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:58,015 INFO L93 Difference]: Finished difference Result 781 states and 1008 transitions. [2022-04-06 20:39:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:39:58,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:39:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:58,016 INFO L225 Difference]: With dead ends: 781 [2022-04-06 20:39:58,017 INFO L226 Difference]: Without dead ends: 718 [2022-04-06 20:39:58,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=4632, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:39:58,017 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 103 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:58,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 142 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1876 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:39:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-04-06 20:39:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 526. [2022-04-06 20:39:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 521 states have (on average 1.3128598848368522) internal successors, (684), 521 states have internal predecessors, (684), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 688 transitions. [2022-04-06 20:39:58,330 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 688 transitions. Word has length 43 [2022-04-06 20:39:58,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:58,330 INFO L478 AbstractCegarLoop]: Abstraction has 526 states and 688 transitions. [2022-04-06 20:39:58,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 688 transitions. [2022-04-06 20:39:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:39:58,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:58,331 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:58,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 20:39:58,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:58,532 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1161710353, now seen corresponding path program 53 times [2022-04-06 20:39:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:58,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725968822] [2022-04-06 20:39:58,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:58,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:58,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1161710353, now seen corresponding path program 54 times [2022-04-06 20:39:58,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:58,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490231060] [2022-04-06 20:39:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:58,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:58,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:58,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:58,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490231060] [2022-04-06 20:39:58,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490231060] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:58,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781269652] [2022-04-06 20:39:58,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:58,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:58,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:59,000 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:59,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:40:01,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-06 20:40:01,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:01,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:40:01,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:01,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:02,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781269652] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:02,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:02,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:40:02,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725968822] [2022-04-06 20:40:02,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725968822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:02,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:02,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:40:02,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177032230] [2022-04-06 20:40:02,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:02,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:40:02,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:02,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:40:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=2875, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:40:02,855 INFO L87 Difference]: Start difference. First operand 526 states and 688 transitions. Second operand has 32 states, 32 states have (on average 1.21875) internal successors, (39), 31 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:10,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:10,052 INFO L93 Difference]: Finished difference Result 1270 states and 1810 transitions. [2022-04-06 20:40:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:40:10,053 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 31 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:40:10,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:10,054 INFO L225 Difference]: With dead ends: 1270 [2022-04-06 20:40:10,054 INFO L226 Difference]: Without dead ends: 1228 [2022-04-06 20:40:10,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1837, Invalid=6353, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:40:10,058 INFO L913 BasicCegarLoop]: 186 mSDtfsCounter, 303 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 8205 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 8362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 8205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:10,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 333 Invalid, 8362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 8205 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 20:40:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-04-06 20:40:10,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 543. [2022-04-06 20:40:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.3178438661710037) internal successors, (709), 538 states have internal predecessors, (709), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 713 transitions. [2022-04-06 20:40:10,427 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 713 transitions. Word has length 43 [2022-04-06 20:40:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:10,427 INFO L478 AbstractCegarLoop]: Abstraction has 543 states and 713 transitions. [2022-04-06 20:40:10,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 31 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 713 transitions. [2022-04-06 20:40:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:40:10,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:10,428 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:10,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 20:40:10,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:10,628 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:10,629 INFO L85 PathProgramCache]: Analyzing trace with hash -733099069, now seen corresponding path program 13 times [2022-04-06 20:40:10,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:10,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1719912823] [2022-04-06 20:40:10,629 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:10,629 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:10,630 INFO L85 PathProgramCache]: Analyzing trace with hash -733099069, now seen corresponding path program 14 times [2022-04-06 20:40:10,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:10,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531973365] [2022-04-06 20:40:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:10,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:10,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:10,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:10,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531973365] [2022-04-06 20:40:10,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531973365] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:10,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992548182] [2022-04-06 20:40:10,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:10,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:10,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:10,803 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:10,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:40:10,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:40:10,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:11,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:11,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992548182] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:11,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:11,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2022-04-06 20:40:11,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1719912823] [2022-04-06 20:40:11,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1719912823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:11,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:11,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:40:11,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967643006] [2022-04-06 20:40:11,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:11,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:40:11,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:40:11,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:40:11,127 INFO L87 Difference]: Start difference. First operand 543 states and 713 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:12,680 INFO L93 Difference]: Finished difference Result 694 states and 941 transitions. [2022-04-06 20:40:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:40:12,680 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:40:12,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:12,681 INFO L225 Difference]: With dead ends: 694 [2022-04-06 20:40:12,681 INFO L226 Difference]: Without dead ends: 680 [2022-04-06 20:40:12,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:40:12,682 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:12,682 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 78 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:40:12,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-04-06 20:40:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 600. [2022-04-06 20:40:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 595 states have (on average 1.3210084033613445) internal successors, (786), 595 states have internal predecessors, (786), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 790 transitions. [2022-04-06 20:40:13,074 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 790 transitions. Word has length 44 [2022-04-06 20:40:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:13,074 INFO L478 AbstractCegarLoop]: Abstraction has 600 states and 790 transitions. [2022-04-06 20:40:13,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 790 transitions. [2022-04-06 20:40:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:40:13,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:13,075 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:13,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-06 20:40:13,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-04-06 20:40:13,275 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1242289278, now seen corresponding path program 39 times [2022-04-06 20:40:13,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:13,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425817905] [2022-04-06 20:40:13,276 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:13,276 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:13,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1242289278, now seen corresponding path program 40 times [2022-04-06 20:40:13,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:13,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118334979] [2022-04-06 20:40:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:13,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:13,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:40:13,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:13,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118334979] [2022-04-06 20:40:13,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118334979] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:13,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399295898] [2022-04-06 20:40:13,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:13,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:13,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:13,532 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:13,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:40:13,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:13,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:13,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:40:13,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:40:13,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:40:13,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399295898] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:13,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:13,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11, 11] total 32 [2022-04-06 20:40:13,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:13,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425817905] [2022-04-06 20:40:13,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425817905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:13,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:13,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:40:13,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234204467] [2022-04-06 20:40:13,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:13,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:40:13,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:13,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:40:13,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=923, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:40:13,896 INFO L87 Difference]: Start difference. First operand 600 states and 790 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:17,312 INFO L93 Difference]: Finished difference Result 804 states and 1049 transitions. [2022-04-06 20:40:17,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:40:17,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:40:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:17,314 INFO L225 Difference]: With dead ends: 804 [2022-04-06 20:40:17,314 INFO L226 Difference]: Without dead ends: 786 [2022-04-06 20:40:17,314 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=383, Invalid=5623, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:40:17,314 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 102 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:17,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 147 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:40:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-04-06 20:40:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 601. [2022-04-06 20:40:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 596 states have (on average 1.320469798657718) internal successors, (787), 596 states have internal predecessors, (787), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 791 transitions. [2022-04-06 20:40:17,708 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 791 transitions. Word has length 44 [2022-04-06 20:40:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:17,708 INFO L478 AbstractCegarLoop]: Abstraction has 601 states and 791 transitions. [2022-04-06 20:40:17,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 791 transitions. [2022-04-06 20:40:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:40:17,709 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:17,709 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:17,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 20:40:17,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:17,910 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:17,910 INFO L85 PathProgramCache]: Analyzing trace with hash 251508882, now seen corresponding path program 43 times [2022-04-06 20:40:17,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:17,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1133174799] [2022-04-06 20:40:17,910 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:17,911 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash 251508882, now seen corresponding path program 44 times [2022-04-06 20:40:17,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:17,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059003645] [2022-04-06 20:40:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:18,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:40:18,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:18,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059003645] [2022-04-06 20:40:18,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059003645] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:18,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060918739] [2022-04-06 20:40:18,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:18,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:18,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:18,112 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:18,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:40:18,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:18,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:18,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:40:18,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:40:18,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:40:19,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060918739] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:19,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:19,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 26] total 52 [2022-04-06 20:40:19,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:19,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1133174799] [2022-04-06 20:40:19,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1133174799] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:19,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:19,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:40:19,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768996525] [2022-04-06 20:40:19,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:19,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:40:19,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:40:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2250, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:40:19,194 INFO L87 Difference]: Start difference. First operand 601 states and 791 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:22,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:22,192 INFO L93 Difference]: Finished difference Result 898 states and 1147 transitions. [2022-04-06 20:40:22,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:40:22,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:40:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:22,194 INFO L225 Difference]: With dead ends: 898 [2022-04-06 20:40:22,194 INFO L226 Difference]: Without dead ends: 876 [2022-04-06 20:40:22,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=862, Invalid=4540, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:40:22,195 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 114 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:22,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 140 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-04-06 20:40:22,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 601. [2022-04-06 20:40:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 596 states have (on average 1.3187919463087248) internal successors, (786), 596 states have internal predecessors, (786), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 790 transitions. [2022-04-06 20:40:22,588 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 790 transitions. Word has length 44 [2022-04-06 20:40:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:22,588 INFO L478 AbstractCegarLoop]: Abstraction has 601 states and 790 transitions. [2022-04-06 20:40:22,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 790 transitions. [2022-04-06 20:40:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:40:22,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:22,589 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:22,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:22,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:22,812 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash 837710210, now seen corresponding path program 45 times [2022-04-06 20:40:22,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:22,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1848546498] [2022-04-06 20:40:22,813 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:22,814 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:22,814 INFO L85 PathProgramCache]: Analyzing trace with hash 837710210, now seen corresponding path program 46 times [2022-04-06 20:40:22,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:22,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040413901] [2022-04-06 20:40:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:22,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:23,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:40:23,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040413901] [2022-04-06 20:40:23,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040413901] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852871504] [2022-04-06 20:40:23,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:23,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:23,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:23,014 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:23,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:40:23,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:23,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:23,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:40:23,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:40:23,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:40:23,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852871504] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:23,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:23,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:40:23,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:23,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1848546498] [2022-04-06 20:40:23,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1848546498] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:23,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:23,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:40:23,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403755834] [2022-04-06 20:40:23,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:23,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:40:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:40:23,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:40:23,555 INFO L87 Difference]: Start difference. First operand 601 states and 790 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:26,708 INFO L93 Difference]: Finished difference Result 937 states and 1191 transitions. [2022-04-06 20:40:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:40:26,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:40:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:26,716 INFO L225 Difference]: With dead ends: 937 [2022-04-06 20:40:26,716 INFO L226 Difference]: Without dead ends: 915 [2022-04-06 20:40:26,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=606, Invalid=2364, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:40:26,716 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 125 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:26,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 163 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:40:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-04-06 20:40:27,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 601. [2022-04-06 20:40:27,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 596 states have (on average 1.3171140939597314) internal successors, (785), 596 states have internal predecessors, (785), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 789 transitions. [2022-04-06 20:40:27,125 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 789 transitions. Word has length 44 [2022-04-06 20:40:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:27,126 INFO L478 AbstractCegarLoop]: Abstraction has 601 states and 789 transitions. [2022-04-06 20:40:27,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 789 transitions. [2022-04-06 20:40:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:40:27,127 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:27,127 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:27,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 20:40:27,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 20:40:27,327 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash 579525266, now seen corresponding path program 47 times [2022-04-06 20:40:27,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:27,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1780710578] [2022-04-06 20:40:27,329 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:27,329 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:27,329 INFO L85 PathProgramCache]: Analyzing trace with hash 579525266, now seen corresponding path program 48 times [2022-04-06 20:40:27,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:27,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615384103] [2022-04-06 20:40:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:27,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:27,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:40:27,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615384103] [2022-04-06 20:40:27,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615384103] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471756209] [2022-04-06 20:40:27,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:27,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:27,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:27,521 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:27,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:40:27,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:40:27,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:27,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:40:27,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-04-06 20:40:27,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-04-06 20:40:27,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471756209] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:27,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:27,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 25 [2022-04-06 20:40:27,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:27,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1780710578] [2022-04-06 20:40:27,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1780710578] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:27,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:27,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:40:27,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376071059] [2022-04-06 20:40:27,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:27,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:40:27,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:27,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:40:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:40:27,795 INFO L87 Difference]: Start difference. First operand 601 states and 789 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:31,091 INFO L93 Difference]: Finished difference Result 977 states and 1236 transitions. [2022-04-06 20:40:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:40:31,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:40:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:31,093 INFO L225 Difference]: With dead ends: 977 [2022-04-06 20:40:31,093 INFO L226 Difference]: Without dead ends: 955 [2022-04-06 20:40:31,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:40:31,093 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 140 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:31,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 166 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1979 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:40:31,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-04-06 20:40:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 601. [2022-04-06 20:40:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 596 states have (on average 1.3154362416107384) internal successors, (784), 596 states have internal predecessors, (784), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 788 transitions. [2022-04-06 20:40:31,478 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 788 transitions. Word has length 44 [2022-04-06 20:40:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:31,478 INFO L478 AbstractCegarLoop]: Abstraction has 601 states and 788 transitions. [2022-04-06 20:40:31,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 788 transitions. [2022-04-06 20:40:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:40:31,479 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:31,479 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:31,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:31,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:31,695 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash 787775426, now seen corresponding path program 55 times [2022-04-06 20:40:31,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:31,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [117826438] [2022-04-06 20:40:31,696 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:31,696 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash 787775426, now seen corresponding path program 56 times [2022-04-06 20:40:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:31,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738208585] [2022-04-06 20:40:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:31,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:32,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:32,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:32,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738208585] [2022-04-06 20:40:32,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738208585] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:32,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748125827] [2022-04-06 20:40:32,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:32,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:32,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:32,196 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:32,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:40:32,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:32,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:40:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:32,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:33,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748125827] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:33,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:33,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:40:33,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:33,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [117826438] [2022-04-06 20:40:33,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [117826438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:33,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:33,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:40:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042836474] [2022-04-06 20:40:33,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:33,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:40:33,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:40:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=3064, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:40:33,620 INFO L87 Difference]: Start difference. First operand 601 states and 788 transitions. Second operand has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:41,491 INFO L93 Difference]: Finished difference Result 1402 states and 2004 transitions. [2022-04-06 20:40:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:40:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:40:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:41,493 INFO L225 Difference]: With dead ends: 1402 [2022-04-06 20:40:41,493 INFO L226 Difference]: Without dead ends: 1357 [2022-04-06 20:40:41,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1960, Invalid=6782, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:40:41,494 INFO L913 BasicCegarLoop]: 193 mSDtfsCounter, 313 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 8818 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 8978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 8818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:41,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 345 Invalid, 8978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 8818 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:40:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-04-06 20:40:41,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 620. [2022-04-06 20:40:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 615 states have (on average 1.3203252032520325) internal successors, (812), 615 states have internal predecessors, (812), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 816 transitions. [2022-04-06 20:40:41,902 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 816 transitions. Word has length 44 [2022-04-06 20:40:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:41,902 INFO L478 AbstractCegarLoop]: Abstraction has 620 states and 816 transitions. [2022-04-06 20:40:41,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 816 transitions. [2022-04-06 20:40:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:40:41,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:41,903 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:41,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:42,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:42,103 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash 507163920, now seen corresponding path program 41 times [2022-04-06 20:40:42,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:42,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [662271425] [2022-04-06 20:40:42,104 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:42,104 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash 507163920, now seen corresponding path program 42 times [2022-04-06 20:40:42,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:42,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236358445] [2022-04-06 20:40:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:42,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:42,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:40:42,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:42,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236358445] [2022-04-06 20:40:42,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236358445] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:42,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563738994] [2022-04-06 20:40:42,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:42,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:42,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:42,387 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:42,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:40:42,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:40:42,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:40:42,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:42,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:42,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563738994] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:42,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:42,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12, 12] total 34 [2022-04-06 20:40:42,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:42,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [662271425] [2022-04-06 20:40:42,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [662271425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:42,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:42,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:40:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159930633] [2022-04-06 20:40:42,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:42,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:40:42,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:42,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:40:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1048, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:40:42,932 INFO L87 Difference]: Start difference. First operand 620 states and 816 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:46,512 INFO L93 Difference]: Finished difference Result 824 states and 1075 transitions. [2022-04-06 20:40:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:40:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:40:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:46,514 INFO L225 Difference]: With dead ends: 824 [2022-04-06 20:40:46,514 INFO L226 Difference]: Without dead ends: 806 [2022-04-06 20:40:46,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=428, Invalid=6712, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:40:46,514 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 97 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:46,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 162 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:40:46,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-04-06 20:40:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 621. [2022-04-06 20:40:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 616 states have (on average 1.3198051948051948) internal successors, (813), 616 states have internal predecessors, (813), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 817 transitions. [2022-04-06 20:40:46,913 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 817 transitions. Word has length 45 [2022-04-06 20:40:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:46,913 INFO L478 AbstractCegarLoop]: Abstraction has 621 states and 817 transitions. [2022-04-06 20:40:46,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 817 transitions. [2022-04-06 20:40:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:40:46,914 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:46,914 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:46,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:47,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:47,115 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:47,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1092292431, now seen corresponding path program 57 times [2022-04-06 20:40:47,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:47,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1284474140] [2022-04-06 20:40:47,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:47,116 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1092292431, now seen corresponding path program 58 times [2022-04-06 20:40:47,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:47,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099588665] [2022-04-06 20:40:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:47,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:47,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:47,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:47,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099588665] [2022-04-06 20:40:47,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099588665] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:47,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519628617] [2022-04-06 20:40:47,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:47,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:47,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:47,613 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:47,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:40:47,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:47,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:47,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:40:47,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:47,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:49,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519628617] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:49,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:49,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:40:49,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:49,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1284474140] [2022-04-06 20:40:49,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1284474140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:49,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:49,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:40:49,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418037710] [2022-04-06 20:40:49,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:49,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:40:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:40:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=3259, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:40:49,096 INFO L87 Difference]: Start difference. First operand 621 states and 817 transitions. Second operand has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:57,440 INFO L93 Difference]: Finished difference Result 1447 states and 2072 transitions. [2022-04-06 20:40:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:40:57,440 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:40:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:57,442 INFO L225 Difference]: With dead ends: 1447 [2022-04-06 20:40:57,442 INFO L226 Difference]: Without dead ends: 1402 [2022-04-06 20:40:57,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2087, Invalid=7225, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:40:57,443 INFO L913 BasicCegarLoop]: 200 mSDtfsCounter, 331 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 9451 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 9622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 9451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:57,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 357 Invalid, 9622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 9451 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 20:40:57,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2022-04-06 20:40:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 640. [2022-04-06 20:40:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 635 states have (on average 1.3244094488188976) internal successors, (841), 635 states have internal predecessors, (841), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 845 transitions. [2022-04-06 20:40:57,914 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 845 transitions. Word has length 45 [2022-04-06 20:40:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:57,914 INFO L478 AbstractCegarLoop]: Abstraction has 640 states and 845 transitions. [2022-04-06 20:40:57,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 33 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:57,914 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 845 transitions. [2022-04-06 20:40:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:40:57,915 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:57,915 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:57,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:58,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-04-06 20:40:58,115 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash 284721058, now seen corresponding path program 17 times [2022-04-06 20:40:58,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:58,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1705265334] [2022-04-06 20:40:58,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:58,117 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:58,117 INFO L85 PathProgramCache]: Analyzing trace with hash 284721058, now seen corresponding path program 18 times [2022-04-06 20:40:58,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:58,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781017538] [2022-04-06 20:40:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:58,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:58,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:40:58,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781017538] [2022-04-06 20:40:58,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781017538] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758474755] [2022-04-06 20:40:58,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:58,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:58,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:58,622 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:58,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:40:58,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:40:58,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:58,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:40:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:40:59,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:40:59,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758474755] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:59,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:59,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 33 [2022-04-06 20:40:59,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:59,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1705265334] [2022-04-06 20:40:59,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1705265334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:59,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:59,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:40:59,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784165706] [2022-04-06 20:40:59,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:59,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:40:59,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:40:59,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:40:59,574 INFO L87 Difference]: Start difference. First operand 640 states and 845 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:00,872 INFO L93 Difference]: Finished difference Result 653 states and 858 transitions. [2022-04-06 20:41:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:41:00,872 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:41:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:00,873 INFO L225 Difference]: With dead ends: 653 [2022-04-06 20:41:00,873 INFO L226 Difference]: Without dead ends: 641 [2022-04-06 20:41:00,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 75 SyntacticMatches, 17 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=199, Invalid=2057, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:41:00,874 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:00,874 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 71 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:41:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-04-06 20:41:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2022-04-06 20:41:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 636 states have (on average 1.3238993710691824) internal successors, (842), 636 states have internal predecessors, (842), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 846 transitions. [2022-04-06 20:41:01,284 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 846 transitions. Word has length 46 [2022-04-06 20:41:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:01,285 INFO L478 AbstractCegarLoop]: Abstraction has 641 states and 846 transitions. [2022-04-06 20:41:01,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 846 transitions. [2022-04-06 20:41:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:41:01,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:01,285 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:01,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-06 20:41:01,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:01,486 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1094361790, now seen corresponding path program 43 times [2022-04-06 20:41:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:01,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [652763156] [2022-04-06 20:41:01,487 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:01,487 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1094361790, now seen corresponding path program 44 times [2022-04-06 20:41:01,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:01,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334056005] [2022-04-06 20:41:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:01,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:01,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:01,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:01,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334056005] [2022-04-06 20:41:01,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334056005] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:01,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583853584] [2022-04-06 20:41:01,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:01,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:01,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:01,829 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:01,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:41:01,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:01,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:41:01,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:41:02,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:41:02,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583853584] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:02,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:02,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 37 [2022-04-06 20:41:02,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:02,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [652763156] [2022-04-06 20:41:02,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [652763156] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:02,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:02,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:41:02,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76862442] [2022-04-06 20:41:02,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:02,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:41:02,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:02,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:41:02,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:41:02,277 INFO L87 Difference]: Start difference. First operand 641 states and 846 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:10,274 INFO L93 Difference]: Finished difference Result 968 states and 1349 transitions. [2022-04-06 20:41:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-04-06 20:41:10,274 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:41:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:10,276 INFO L225 Difference]: With dead ends: 968 [2022-04-06 20:41:10,276 INFO L226 Difference]: Without dead ends: 949 [2022-04-06 20:41:10,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10038 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1019, Invalid=31201, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 20:41:10,278 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 186 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 7240 mSolverCounterSat, 639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 7879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 7240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:10,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 180 Invalid, 7879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 7240 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:41:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-04-06 20:41:10,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 654. [2022-04-06 20:41:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 649 states have (on average 1.3174114021571648) internal successors, (855), 649 states have internal predecessors, (855), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 859 transitions. [2022-04-06 20:41:10,773 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 859 transitions. Word has length 46 [2022-04-06 20:41:10,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:10,773 INFO L478 AbstractCegarLoop]: Abstraction has 654 states and 859 transitions. [2022-04-06 20:41:10,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:10,773 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 859 transitions. [2022-04-06 20:41:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:41:10,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:10,774 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:10,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 20:41:10,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:10,975 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1355774284, now seen corresponding path program 49 times [2022-04-06 20:41:10,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:10,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1150299148] [2022-04-06 20:41:10,976 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:10,976 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:10,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1355774284, now seen corresponding path program 50 times [2022-04-06 20:41:10,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:10,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320379263] [2022-04-06 20:41:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:10,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:11,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 20:41:11,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:11,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320379263] [2022-04-06 20:41:11,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320379263] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:11,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521412282] [2022-04-06 20:41:11,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:11,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:11,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:11,177 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:11,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:41:11,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:11,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:11,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:41:11,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:41:11,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:41:12,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521412282] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:12,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:12,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26, 26] total 52 [2022-04-06 20:41:12,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:12,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1150299148] [2022-04-06 20:41:12,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1150299148] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:12,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:12,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:41:12,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568867994] [2022-04-06 20:41:12,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:12,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:41:12,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:12,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:41:12,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2250, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:41:12,155 INFO L87 Difference]: Start difference. First operand 654 states and 859 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:15,733 INFO L93 Difference]: Finished difference Result 958 states and 1233 transitions. [2022-04-06 20:41:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:41:15,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:41:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:15,735 INFO L225 Difference]: With dead ends: 958 [2022-04-06 20:41:15,735 INFO L226 Difference]: Without dead ends: 935 [2022-04-06 20:41:15,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1009, Invalid=5153, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:41:15,736 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 117 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:15,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 157 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:41:15,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-04-06 20:41:16,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 654. [2022-04-06 20:41:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 649 states have (on average 1.3158705701078584) internal successors, (854), 649 states have internal predecessors, (854), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 858 transitions. [2022-04-06 20:41:16,182 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 858 transitions. Word has length 46 [2022-04-06 20:41:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:16,182 INFO L478 AbstractCegarLoop]: Abstraction has 654 states and 858 transitions. [2022-04-06 20:41:16,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 858 transitions. [2022-04-06 20:41:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:41:16,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:16,183 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:16,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-04-06 20:41:16,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:16,384 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:16,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1325805772, now seen corresponding path program 45 times [2022-04-06 20:41:16,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:16,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [131844443] [2022-04-06 20:41:16,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:16,385 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:16,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1325805772, now seen corresponding path program 46 times [2022-04-06 20:41:16,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:16,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688619272] [2022-04-06 20:41:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:16,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:16,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:41:16,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:16,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688619272] [2022-04-06 20:41:16,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688619272] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:16,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415445718] [2022-04-06 20:41:16,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:16,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:16,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:16,659 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:16,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:41:16,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:16,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:16,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:41:16,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 32 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:41:16,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 32 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:41:17,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415445718] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:17,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:17,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11, 11] total 33 [2022-04-06 20:41:17,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:17,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [131844443] [2022-04-06 20:41:17,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [131844443] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:17,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:17,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:41:17,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178024863] [2022-04-06 20:41:17,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:17,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:41:17,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:17,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:41:17,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=985, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:41:17,066 INFO L87 Difference]: Start difference. First operand 654 states and 858 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:21,073 INFO L93 Difference]: Finished difference Result 949 states and 1225 transitions. [2022-04-06 20:41:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:41:21,075 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:41:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:21,091 INFO L225 Difference]: With dead ends: 949 [2022-04-06 20:41:21,092 INFO L226 Difference]: Without dead ends: 881 [2022-04-06 20:41:21,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=419, Invalid=6553, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:41:21,093 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 114 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:21,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 143 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2137 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:41:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-04-06 20:41:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 655. [2022-04-06 20:41:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 650 states have (on average 1.3107692307692307) internal successors, (852), 650 states have internal predecessors, (852), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 856 transitions. [2022-04-06 20:41:21,599 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 856 transitions. Word has length 46 [2022-04-06 20:41:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:21,599 INFO L478 AbstractCegarLoop]: Abstraction has 655 states and 856 transitions. [2022-04-06 20:41:21,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 856 transitions. [2022-04-06 20:41:21,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:41:21,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:21,600 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:21,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-04-06 20:41:21,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:21,801 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash 455029666, now seen corresponding path program 51 times [2022-04-06 20:41:21,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:21,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [622000474] [2022-04-06 20:41:21,802 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:21,802 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:21,802 INFO L85 PathProgramCache]: Analyzing trace with hash 455029666, now seen corresponding path program 52 times [2022-04-06 20:41:21,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:21,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300431086] [2022-04-06 20:41:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:21,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:22,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:41:22,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300431086] [2022-04-06 20:41:22,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300431086] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804657117] [2022-04-06 20:41:22,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:22,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:22,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:22,024 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:22,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:41:22,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:22,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:22,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:41:22,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:41:22,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:41:22,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804657117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:22,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:22,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:41:22,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:22,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [622000474] [2022-04-06 20:41:22,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [622000474] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:22,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:22,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:41:22,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304096734] [2022-04-06 20:41:22,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:22,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:41:22,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:22,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:41:22,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:41:22,628 INFO L87 Difference]: Start difference. First operand 655 states and 856 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:26,291 INFO L93 Difference]: Finished difference Result 1000 states and 1278 transitions. [2022-04-06 20:41:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:41:26,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:41:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:26,292 INFO L225 Difference]: With dead ends: 1000 [2022-04-06 20:41:26,292 INFO L226 Difference]: Without dead ends: 977 [2022-04-06 20:41:26,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=721, Invalid=2939, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:41:26,293 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 130 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:26,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 152 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-04-06 20:41:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 655. [2022-04-06 20:41:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 650 states have (on average 1.3092307692307692) internal successors, (851), 650 states have internal predecessors, (851), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 855 transitions. [2022-04-06 20:41:26,782 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 855 transitions. Word has length 46 [2022-04-06 20:41:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:26,782 INFO L478 AbstractCegarLoop]: Abstraction has 655 states and 855 transitions. [2022-04-06 20:41:26,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 855 transitions. [2022-04-06 20:41:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:41:26,783 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:26,783 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:26,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-04-06 20:41:26,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-06 20:41:26,983 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash -179293964, now seen corresponding path program 53 times [2022-04-06 20:41:26,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:26,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [73309299] [2022-04-06 20:41:26,984 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:26,984 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash -179293964, now seen corresponding path program 54 times [2022-04-06 20:41:26,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:26,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895728172] [2022-04-06 20:41:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:26,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:27,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 20:41:27,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:27,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895728172] [2022-04-06 20:41:27,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895728172] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:27,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341757148] [2022-04-06 20:41:27,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:27,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:27,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:27,224 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:27,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:41:27,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:41:27,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:27,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:41:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 20:41:27,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 20:41:27,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341757148] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:27,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:27,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 29 [2022-04-06 20:41:27,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:27,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [73309299] [2022-04-06 20:41:27,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [73309299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:27,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:27,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:41:27,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992466457] [2022-04-06 20:41:27,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:27,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:41:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:27,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:41:27,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:41:27,881 INFO L87 Difference]: Start difference. First operand 655 states and 855 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:31,871 INFO L93 Difference]: Finished difference Result 1042 states and 1326 transitions. [2022-04-06 20:41:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:41:31,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:41:31,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:31,873 INFO L225 Difference]: With dead ends: 1042 [2022-04-06 20:41:31,873 INFO L226 Difference]: Without dead ends: 1019 [2022-04-06 20:41:31,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=2149, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:41:31,873 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 141 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:31,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 175 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:41:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-04-06 20:41:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 655. [2022-04-06 20:41:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 650 states have (on average 1.3076923076923077) internal successors, (850), 650 states have internal predecessors, (850), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 854 transitions. [2022-04-06 20:41:32,362 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 854 transitions. Word has length 46 [2022-04-06 20:41:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:32,362 INFO L478 AbstractCegarLoop]: Abstraction has 655 states and 854 transitions. [2022-04-06 20:41:32,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 854 transitions. [2022-04-06 20:41:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:41:32,363 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:32,363 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:32,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 20:41:32,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 20:41:32,565 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:32,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1723776670, now seen corresponding path program 55 times [2022-04-06 20:41:32,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:32,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [102014126] [2022-04-06 20:41:32,566 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:32,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:32,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1723776670, now seen corresponding path program 56 times [2022-04-06 20:41:32,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:32,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748581004] [2022-04-06 20:41:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:32,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:32,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:41:32,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:32,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748581004] [2022-04-06 20:41:32,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748581004] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:32,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352577557] [2022-04-06 20:41:32,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:32,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:32,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:32,766 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:32,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:41:32,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:32,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:41:32,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:33,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:41:34,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352577557] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:34,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:34,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32, 32] total 64 [2022-04-06 20:41:34,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:34,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [102014126] [2022-04-06 20:41:34,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [102014126] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:34,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:34,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:41:34,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328270797] [2022-04-06 20:41:34,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:34,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:41:34,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:34,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:41:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:41:34,199 INFO L87 Difference]: Start difference. First operand 655 states and 854 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:38,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:38,513 INFO L93 Difference]: Finished difference Result 1085 states and 1375 transitions. [2022-04-06 20:41:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:41:38,514 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:41:38,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:38,515 INFO L225 Difference]: With dead ends: 1085 [2022-04-06 20:41:38,515 INFO L226 Difference]: Without dead ends: 1062 [2022-04-06 20:41:38,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=958, Invalid=5684, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:41:38,516 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 156 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:38,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 178 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:41:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-04-06 20:41:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 655. [2022-04-06 20:41:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 650 states have (on average 1.3061538461538462) internal successors, (849), 650 states have internal predecessors, (849), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 853 transitions. [2022-04-06 20:41:38,993 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 853 transitions. Word has length 46 [2022-04-06 20:41:38,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:38,993 INFO L478 AbstractCegarLoop]: Abstraction has 655 states and 853 transitions. [2022-04-06 20:41:38,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 853 transitions. [2022-04-06 20:41:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:41:38,994 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:38,994 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:39,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 20:41:39,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-06 20:41:39,195 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1942384994, now seen corresponding path program 59 times [2022-04-06 20:41:39,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:39,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012394529] [2022-04-06 20:41:39,196 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:39,196 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:39,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1942384994, now seen corresponding path program 60 times [2022-04-06 20:41:39,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:39,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078708222] [2022-04-06 20:41:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:39,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:39,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078708222] [2022-04-06 20:41:39,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078708222] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:39,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578278673] [2022-04-06 20:41:39,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:39,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:39,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:39,769 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:39,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:41:42,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 20:41:42,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:42,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:41:42,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:42,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:43,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578278673] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:43,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:43,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:41:43,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:43,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012394529] [2022-04-06 20:41:43,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012394529] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:43,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:43,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:41:43,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840817994] [2022-04-06 20:41:43,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:43,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:41:43,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:43,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:41:43,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3460, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:41:43,683 INFO L87 Difference]: Start difference. First operand 655 states and 853 transitions. Second operand has 35 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:53,402 INFO L93 Difference]: Finished difference Result 1567 states and 2238 transitions. [2022-04-06 20:41:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:41:53,403 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:41:53,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:53,405 INFO L225 Difference]: With dead ends: 1567 [2022-04-06 20:41:53,405 INFO L226 Difference]: Without dead ends: 1522 [2022-04-06 20:41:53,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2218, Invalid=7682, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:41:53,405 INFO L913 BasicCegarLoop]: 207 mSDtfsCounter, 340 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 10107 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 10280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 10107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:53,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 369 Invalid, 10280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 10107 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:41:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-04-06 20:41:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 674. [2022-04-06 20:41:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 669 states have (on average 1.3109118086696563) internal successors, (877), 669 states have internal predecessors, (877), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 881 transitions. [2022-04-06 20:41:53,902 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 881 transitions. Word has length 46 [2022-04-06 20:41:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:53,902 INFO L478 AbstractCegarLoop]: Abstraction has 674 states and 881 transitions. [2022-04-06 20:41:53,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 881 transitions. [2022-04-06 20:41:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:41:53,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:53,903 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:53,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:54,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:54,103 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:54,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1993968048, now seen corresponding path program 19 times [2022-04-06 20:41:54,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:54,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350734953] [2022-04-06 20:41:54,104 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:54,104 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:54,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1993968048, now seen corresponding path program 20 times [2022-04-06 20:41:54,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:54,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107715331] [2022-04-06 20:41:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:54,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:54,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-04-06 20:41:54,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:54,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107715331] [2022-04-06 20:41:54,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107715331] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:54,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274695934] [2022-04-06 20:41:54,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:54,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:54,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:54,227 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:54,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:41:54,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:54,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:41:54,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-04-06 20:41:54,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-04-06 20:41:54,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274695934] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:54,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:54,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-04-06 20:41:54,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:54,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350734953] [2022-04-06 20:41:54,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350734953] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:54,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:54,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:41:54,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740402347] [2022-04-06 20:41:54,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:54,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:41:54,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:41:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:41:54,431 INFO L87 Difference]: Start difference. First operand 674 states and 881 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:55,621 INFO L93 Difference]: Finished difference Result 739 states and 957 transitions. [2022-04-06 20:41:55,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:41:55,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:41:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:55,623 INFO L225 Difference]: With dead ends: 739 [2022-04-06 20:41:55,623 INFO L226 Difference]: Without dead ends: 701 [2022-04-06 20:41:55,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:41:55,624 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 44 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:55,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 85 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:41:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-04-06 20:41:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 653. [2022-04-06 20:41:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 648 states have (on average 1.3179012345679013) internal successors, (854), 648 states have internal predecessors, (854), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 858 transitions. [2022-04-06 20:41:56,174 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 858 transitions. Word has length 47 [2022-04-06 20:41:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:56,174 INFO L478 AbstractCegarLoop]: Abstraction has 653 states and 858 transitions. [2022-04-06 20:41:56,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 858 transitions. [2022-04-06 20:41:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:41:56,175 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:56,175 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:56,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:56,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 20:41:56,375 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1100608928, now seen corresponding path program 47 times [2022-04-06 20:41:56,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:56,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [762984994] [2022-04-06 20:41:56,376 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:56,376 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1100608928, now seen corresponding path program 48 times [2022-04-06 20:41:56,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:56,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733160693] [2022-04-06 20:41:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:56,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:56,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:41:56,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:56,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733160693] [2022-04-06 20:41:56,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733160693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:56,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590446223] [2022-04-06 20:41:56,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:56,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:56,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:56,678 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:56,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:41:56,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:41:56,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:56,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 20:41:56,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:41:57,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 90 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:41:57,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590446223] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:57,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:57,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 22] total 55 [2022-04-06 20:41:57,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:57,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [762984994] [2022-04-06 20:41:57,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [762984994] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:57,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:57,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:41:57,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65536405] [2022-04-06 20:41:57,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:57,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:41:57,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:57,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:41:57,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=2618, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:41:57,840 INFO L87 Difference]: Start difference. First operand 653 states and 858 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:02,341 INFO L93 Difference]: Finished difference Result 894 states and 1166 transitions. [2022-04-06 20:42:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:42:02,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:42:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:02,343 INFO L225 Difference]: With dead ends: 894 [2022-04-06 20:42:02,343 INFO L226 Difference]: Without dead ends: 875 [2022-04-06 20:42:02,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1103, Invalid=10239, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:42:02,344 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 107 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2768 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:02,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 171 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2768 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:42:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-04-06 20:42:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 654. [2022-04-06 20:42:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 649 states have (on average 1.3174114021571648) internal successors, (855), 649 states have internal predecessors, (855), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 859 transitions. [2022-04-06 20:42:02,788 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 859 transitions. Word has length 47 [2022-04-06 20:42:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:02,788 INFO L478 AbstractCegarLoop]: Abstraction has 654 states and 859 transitions. [2022-04-06 20:42:02,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 859 transitions. [2022-04-06 20:42:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:42:02,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:02,789 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:02,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-06 20:42:02,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 20:42:02,990 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:02,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1769516625, now seen corresponding path program 61 times [2022-04-06 20:42:02,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:02,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [90614154] [2022-04-06 20:42:02,991 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:02,991 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1769516625, now seen corresponding path program 62 times [2022-04-06 20:42:02,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:02,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570950780] [2022-04-06 20:42:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:02,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:03,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:03,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:03,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570950780] [2022-04-06 20:42:03,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570950780] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:03,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513667249] [2022-04-06 20:42:03,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:03,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:03,540 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:03,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:42:03,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:03,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:03,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:42:03,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:03,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:05,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513667249] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:05,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:05,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:42:05,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:05,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [90614154] [2022-04-06 20:42:05,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [90614154] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:05,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:05,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:42:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591180773] [2022-04-06 20:42:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:05,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:42:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:42:05,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1163, Invalid=3667, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:42:05,183 INFO L87 Difference]: Start difference. First operand 654 states and 859 transitions. Second operand has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:15,553 INFO L93 Difference]: Finished difference Result 1571 states and 2239 transitions. [2022-04-06 20:42:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:42:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:42:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:15,554 INFO L225 Difference]: With dead ends: 1571 [2022-04-06 20:42:15,554 INFO L226 Difference]: Without dead ends: 1524 [2022-04-06 20:42:15,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2353, Invalid=8153, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:42:15,555 INFO L913 BasicCegarLoop]: 211 mSDtfsCounter, 342 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 10656 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 10835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 10656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:15,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 378 Invalid, 10835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 10656 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:42:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2022-04-06 20:42:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 673. [2022-04-06 20:42:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 668 states have (on average 1.3218562874251496) internal successors, (883), 668 states have internal predecessors, (883), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 887 transitions. [2022-04-06 20:42:16,089 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 887 transitions. Word has length 47 [2022-04-06 20:42:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:16,089 INFO L478 AbstractCegarLoop]: Abstraction has 673 states and 887 transitions. [2022-04-06 20:42:16,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 887 transitions. [2022-04-06 20:42:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:42:16,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:16,090 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:16,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-06 20:42:16,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:16,290 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:16,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1122323842, now seen corresponding path program 15 times [2022-04-06 20:42:16,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:16,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1897642266] [2022-04-06 20:42:16,292 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:16,292 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:16,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1122323842, now seen corresponding path program 16 times [2022-04-06 20:42:16,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:16,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948349734] [2022-04-06 20:42:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:16,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:16,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:42:16,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:16,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948349734] [2022-04-06 20:42:16,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948349734] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:16,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008087250] [2022-04-06 20:42:16,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:16,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:16,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:16,543 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:16,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:42:16,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:16,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:16,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:42:16,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:42:16,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:42:16,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008087250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:16,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:16,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 27 [2022-04-06 20:42:16,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:16,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1897642266] [2022-04-06 20:42:16,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1897642266] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:16,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:16,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:42:16,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746957380] [2022-04-06 20:42:16,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:16,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:42:16,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:16,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:42:16,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:42:16,876 INFO L87 Difference]: Start difference. First operand 673 states and 887 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:18,743 INFO L93 Difference]: Finished difference Result 844 states and 1146 transitions. [2022-04-06 20:42:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:42:18,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:42:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:18,745 INFO L225 Difference]: With dead ends: 844 [2022-04-06 20:42:18,745 INFO L226 Difference]: Without dead ends: 829 [2022-04-06 20:42:18,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:42:18,745 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 108 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:18,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 89 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:42:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-04-06 20:42:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 738. [2022-04-06 20:42:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 733 states have (on average 1.324693042291951) internal successors, (971), 733 states have internal predecessors, (971), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 975 transitions. [2022-04-06 20:42:19,307 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 975 transitions. Word has length 48 [2022-04-06 20:42:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:19,308 INFO L478 AbstractCegarLoop]: Abstraction has 738 states and 975 transitions. [2022-04-06 20:42:19,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 975 transitions. [2022-04-06 20:42:19,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:42:19,308 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:19,308 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:19,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-04-06 20:42:19,509 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:19,509 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash -989946700, now seen corresponding path program 49 times [2022-04-06 20:42:19,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:19,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668768963] [2022-04-06 20:42:19,510 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:19,510 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:19,510 INFO L85 PathProgramCache]: Analyzing trace with hash -989946700, now seen corresponding path program 50 times [2022-04-06 20:42:19,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:19,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635987180] [2022-04-06 20:42:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:19,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:42:19,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:19,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635987180] [2022-04-06 20:42:19,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635987180] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:19,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147508295] [2022-04-06 20:42:19,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:19,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:19,820 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:19,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:42:19,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:19,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:19,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:42:19,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 20 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:42:20,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 20 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:42:20,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147508295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:20,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:20,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 37 [2022-04-06 20:42:20,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:20,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668768963] [2022-04-06 20:42:20,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668768963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:20,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:20,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:42:20,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397704193] [2022-04-06 20:42:20,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:20,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:42:20,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:20,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:42:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:42:20,283 INFO L87 Difference]: Start difference. First operand 738 states and 975 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:24,985 INFO L93 Difference]: Finished difference Result 971 states and 1267 transitions. [2022-04-06 20:42:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:42:24,986 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:42:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:24,987 INFO L225 Difference]: With dead ends: 971 [2022-04-06 20:42:24,987 INFO L226 Difference]: Without dead ends: 952 [2022-04-06 20:42:24,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=479, Invalid=8263, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:42:24,987 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 102 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3014 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 3167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 3014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:24,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 176 Invalid, 3167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 3014 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:42:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-04-06 20:42:25,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 739. [2022-04-06 20:42:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 734 states have (on average 1.32425068119891) internal successors, (972), 734 states have internal predecessors, (972), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 976 transitions. [2022-04-06 20:42:25,558 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 976 transitions. Word has length 48 [2022-04-06 20:42:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:25,558 INFO L478 AbstractCegarLoop]: Abstraction has 739 states and 976 transitions. [2022-04-06 20:42:25,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 976 transitions. [2022-04-06 20:42:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:42:25,558 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:25,559 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:25,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:25,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-04-06 20:42:25,759 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:25,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1101889794, now seen corresponding path program 57 times [2022-04-06 20:42:25,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:25,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [72702434] [2022-04-06 20:42:25,760 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:25,760 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:25,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1101889794, now seen corresponding path program 58 times [2022-04-06 20:42:25,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:25,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063862759] [2022-04-06 20:42:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:25,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:25,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:42:25,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:25,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063862759] [2022-04-06 20:42:25,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063862759] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:25,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066610121] [2022-04-06 20:42:25,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:25,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:25,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:25,981 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:25,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 20:42:26,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:26,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:26,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:42:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:42:26,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:42:26,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066610121] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:26,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:26,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:42:26,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:26,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [72702434] [2022-04-06 20:42:26,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [72702434] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:26,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:26,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:42:26,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102700786] [2022-04-06 20:42:26,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:26,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:42:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:42:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:42:26,598 INFO L87 Difference]: Start difference. First operand 739 states and 976 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:30,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:30,732 INFO L93 Difference]: Finished difference Result 1075 states and 1375 transitions. [2022-04-06 20:42:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:42:30,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:42:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:30,733 INFO L225 Difference]: With dead ends: 1075 [2022-04-06 20:42:30,734 INFO L226 Difference]: Without dead ends: 1051 [2022-04-06 20:42:30,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=872, Invalid=3684, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:42:30,734 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 119 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:30,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 168 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:42:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-04-06 20:42:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 739. [2022-04-06 20:42:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 734 states have (on average 1.3228882833787465) internal successors, (971), 734 states have internal predecessors, (971), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 975 transitions. [2022-04-06 20:42:31,291 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 975 transitions. Word has length 48 [2022-04-06 20:42:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:31,292 INFO L478 AbstractCegarLoop]: Abstraction has 739 states and 975 transitions. [2022-04-06 20:42:31,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 975 transitions. [2022-04-06 20:42:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:42:31,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:31,292 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:31,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-04-06 20:42:31,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:31,493 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:31,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1780686382, now seen corresponding path program 59 times [2022-04-06 20:42:31,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:31,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1461663450] [2022-04-06 20:42:31,494 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:31,494 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1780686382, now seen corresponding path program 60 times [2022-04-06 20:42:31,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:31,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598696740] [2022-04-06 20:42:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:31,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:31,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:42:31,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598696740] [2022-04-06 20:42:31,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598696740] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567176915] [2022-04-06 20:42:31,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:31,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:31,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:31,757 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:31,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 20:42:32,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:42:32,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:32,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:42:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:42:32,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:42:32,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567176915] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:32,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:32,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:42:32,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:32,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1461663450] [2022-04-06 20:42:32,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1461663450] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:32,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:32,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:42:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462566596] [2022-04-06 20:42:32,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:32,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:42:32,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:42:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:42:32,933 INFO L87 Difference]: Start difference. First operand 739 states and 975 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:37,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:37,374 INFO L93 Difference]: Finished difference Result 1117 states and 1422 transitions. [2022-04-06 20:42:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:42:37,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:42:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:37,376 INFO L225 Difference]: With dead ends: 1117 [2022-04-06 20:42:37,376 INFO L226 Difference]: Without dead ends: 1093 [2022-04-06 20:42:37,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=793, Invalid=3239, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:42:37,376 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 129 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:37,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 166 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:42:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-04-06 20:42:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 739. [2022-04-06 20:42:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 734 states have (on average 1.3215258855585832) internal successors, (970), 734 states have internal predecessors, (970), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 974 transitions. [2022-04-06 20:42:38,013 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 974 transitions. Word has length 48 [2022-04-06 20:42:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:38,013 INFO L478 AbstractCegarLoop]: Abstraction has 739 states and 974 transitions. [2022-04-06 20:42:38,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 974 transitions. [2022-04-06 20:42:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:42:38,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:38,014 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:38,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 20:42:38,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:38,214 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1596578046, now seen corresponding path program 61 times [2022-04-06 20:42:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:38,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179581833] [2022-04-06 20:42:38,215 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:38,215 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1596578046, now seen corresponding path program 62 times [2022-04-06 20:42:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:38,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036055005] [2022-04-06 20:42:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:38,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:42:38,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036055005] [2022-04-06 20:42:38,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036055005] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193319032] [2022-04-06 20:42:38,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:38,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:38,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:38,455 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:38,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 20:42:38,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:38,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:42:38,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:38,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:39,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193319032] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:39,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:39,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 32, 32] total 64 [2022-04-06 20:42:39,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:39,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179581833] [2022-04-06 20:42:39,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179581833] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:39,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:39,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:42:39,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137302541] [2022-04-06 20:42:39,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:39,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:42:39,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:39,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:42:39,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:42:39,837 INFO L87 Difference]: Start difference. First operand 739 states and 974 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:44,516 INFO L93 Difference]: Finished difference Result 1160 states and 1470 transitions. [2022-04-06 20:42:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:42:44,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:42:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:44,517 INFO L225 Difference]: With dead ends: 1160 [2022-04-06 20:42:44,518 INFO L226 Difference]: Without dead ends: 1136 [2022-04-06 20:42:44,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1056, Invalid=6084, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:42:44,518 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 140 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:44,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 179 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:42:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-04-06 20:42:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 739. [2022-04-06 20:42:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 734 states have (on average 1.3201634877384196) internal successors, (969), 734 states have internal predecessors, (969), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 973 transitions. [2022-04-06 20:42:45,123 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 973 transitions. Word has length 48 [2022-04-06 20:42:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:45,123 INFO L478 AbstractCegarLoop]: Abstraction has 739 states and 973 transitions. [2022-04-06 20:42:45,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:45,123 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 973 transitions. [2022-04-06 20:42:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:42:45,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:45,124 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:45,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:45,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-04-06 20:42:45,325 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:45,325 INFO L85 PathProgramCache]: Analyzing trace with hash -66618414, now seen corresponding path program 63 times [2022-04-06 20:42:45,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:45,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [988689812] [2022-04-06 20:42:45,326 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:45,326 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:45,326 INFO L85 PathProgramCache]: Analyzing trace with hash -66618414, now seen corresponding path program 64 times [2022-04-06 20:42:45,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:45,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361038685] [2022-04-06 20:42:45,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:45,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:45,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:42:45,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:45,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361038685] [2022-04-06 20:42:45,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361038685] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:45,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131384347] [2022-04-06 20:42:45,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:45,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:45,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:45,553 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:45,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 20:42:45,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:45,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:45,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:42:45,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:42:45,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:42:46,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131384347] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:46,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:46,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:42:46,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:46,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [988689812] [2022-04-06 20:42:46,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [988689812] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:46,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:46,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:42:46,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648348406] [2022-04-06 20:42:46,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:46,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:42:46,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:42:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:42:46,185 INFO L87 Difference]: Start difference. First operand 739 states and 973 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:51,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:51,175 INFO L93 Difference]: Finished difference Result 1204 states and 1519 transitions. [2022-04-06 20:42:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:42:51,176 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:42:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:51,177 INFO L225 Difference]: With dead ends: 1204 [2022-04-06 20:42:51,177 INFO L226 Difference]: Without dead ends: 1180 [2022-04-06 20:42:51,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=731, Invalid=2691, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:42:51,177 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 156 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2699 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:51,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 192 Invalid, 2777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2699 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:42:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-04-06 20:42:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 739. [2022-04-06 20:42:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 734 states have (on average 1.318801089918256) internal successors, (968), 734 states have internal predecessors, (968), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 972 transitions. [2022-04-06 20:42:51,740 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 972 transitions. Word has length 48 [2022-04-06 20:42:51,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:51,741 INFO L478 AbstractCegarLoop]: Abstraction has 739 states and 972 transitions. [2022-04-06 20:42:51,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:51,741 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 972 transitions. [2022-04-06 20:42:51,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:42:51,741 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:51,741 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:51,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-04-06 20:42:51,942 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:51,942 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash -874349822, now seen corresponding path program 63 times [2022-04-06 20:42:51,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:51,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [238784178] [2022-04-06 20:42:51,943 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:51,943 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:51,943 INFO L85 PathProgramCache]: Analyzing trace with hash -874349822, now seen corresponding path program 64 times [2022-04-06 20:42:51,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:51,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107336388] [2022-04-06 20:42:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:51,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:52,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:52,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107336388] [2022-04-06 20:42:52,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107336388] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:52,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037737368] [2022-04-06 20:42:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:52,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:52,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:52,561 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:52,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 20:42:52,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:52,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:42:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:52,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:54,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037737368] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:54,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:54,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:42:54,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:54,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [238784178] [2022-04-06 20:42:54,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [238784178] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:54,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:54,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:42:54,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306038534] [2022-04-06 20:42:54,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:54,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:42:54,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:42:54,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=3880, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:42:54,286 INFO L87 Difference]: Start difference. First operand 739 states and 972 transitions. Second operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:05,379 INFO L93 Difference]: Finished difference Result 1719 states and 2456 transitions. [2022-04-06 20:43:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:43:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:43:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:05,381 INFO L225 Difference]: With dead ends: 1719 [2022-04-06 20:43:05,381 INFO L226 Difference]: Without dead ends: 1669 [2022-04-06 20:43:05,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2492, Invalid=8638, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:43:05,382 INFO L913 BasicCegarLoop]: 218 mSDtfsCounter, 351 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 11353 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 11534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 11353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:05,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 390 Invalid, 11534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 11353 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-06 20:43:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2022-04-06 20:43:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 760. [2022-04-06 20:43:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 755 states have (on average 1.32317880794702) internal successors, (999), 755 states have internal predecessors, (999), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1003 transitions. [2022-04-06 20:43:05,959 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1003 transitions. Word has length 48 [2022-04-06 20:43:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:05,960 INFO L478 AbstractCegarLoop]: Abstraction has 760 states and 1003 transitions. [2022-04-06 20:43:05,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1003 transitions. [2022-04-06 20:43:05,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:43:05,960 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:05,960 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:05,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:06,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-06 20:43:06,161 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:06,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1372661728, now seen corresponding path program 51 times [2022-04-06 20:43:06,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:06,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [98630512] [2022-04-06 20:43:06,162 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:06,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:06,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1372661728, now seen corresponding path program 52 times [2022-04-06 20:43:06,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:06,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749823335] [2022-04-06 20:43:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:06,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:06,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:06,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:06,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749823335] [2022-04-06 20:43:06,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749823335] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:06,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494140166] [2022-04-06 20:43:06,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:06,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:06,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:06,541 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:06,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 20:43:06,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:06,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:06,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:43:06,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:43:06,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:43:07,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494140166] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:07,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:07,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14, 14] total 40 [2022-04-06 20:43:07,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:07,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [98630512] [2022-04-06 20:43:07,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [98630512] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:07,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:07,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:43:07,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884683181] [2022-04-06 20:43:07,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:07,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:43:07,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:07,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:43:07,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:43:07,065 INFO L87 Difference]: Start difference. First operand 760 states and 1003 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:17,485 INFO L93 Difference]: Finished difference Result 1140 states and 1587 transitions. [2022-04-06 20:43:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-04-06 20:43:17,485 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:43:17,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:17,486 INFO L225 Difference]: With dead ends: 1140 [2022-04-06 20:43:17,486 INFO L226 Difference]: Without dead ends: 1120 [2022-04-06 20:43:17,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13890 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1195, Invalid=41861, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:43:17,488 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 197 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 8940 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 9674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 8940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:17,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 195 Invalid, 9674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 8940 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:43:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-04-06 20:43:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 774. [2022-04-06 20:43:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 769 states have (on average 1.317295188556567) internal successors, (1013), 769 states have internal predecessors, (1013), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1017 transitions. [2022-04-06 20:43:18,152 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1017 transitions. Word has length 49 [2022-04-06 20:43:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:18,152 INFO L478 AbstractCegarLoop]: Abstraction has 774 states and 1017 transitions. [2022-04-06 20:43:18,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1017 transitions. [2022-04-06 20:43:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:43:18,153 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:18,153 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:18,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:18,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:18,354 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash -580130864, now seen corresponding path program 53 times [2022-04-06 20:43:18,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:18,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676272601] [2022-04-06 20:43:18,355 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:18,355 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash -580130864, now seen corresponding path program 54 times [2022-04-06 20:43:18,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:18,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462983741] [2022-04-06 20:43:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:18,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:18,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:43:18,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462983741] [2022-04-06 20:43:18,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462983741] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361020804] [2022-04-06 20:43:18,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:18,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:18,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:18,681 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:18,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 20:43:18,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:43:18,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:18,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:43:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:43:19,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:43:19,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361020804] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:19,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:19,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 22] total 56 [2022-04-06 20:43:19,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:19,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676272601] [2022-04-06 20:43:19,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676272601] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:19,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:19,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:43:19,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119269151] [2022-04-06 20:43:19,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:19,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:43:19,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:19,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:43:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=2723, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:43:19,930 INFO L87 Difference]: Start difference. First operand 774 states and 1017 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:25,627 INFO L93 Difference]: Finished difference Result 1120 states and 1441 transitions. [2022-04-06 20:43:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:43:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:43:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:25,629 INFO L225 Difference]: With dead ends: 1120 [2022-04-06 20:43:25,629 INFO L226 Difference]: Without dead ends: 1033 [2022-04-06 20:43:25,630 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1192, Invalid=11690, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:43:25,630 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 120 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3199 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 3364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:25,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 182 Invalid, 3364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3199 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:43:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-04-06 20:43:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 775. [2022-04-06 20:43:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 770 states have (on average 1.3116883116883118) internal successors, (1010), 770 states have internal predecessors, (1010), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1014 transitions. [2022-04-06 20:43:26,257 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1014 transitions. Word has length 49 [2022-04-06 20:43:26,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:26,257 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1014 transitions. [2022-04-06 20:43:26,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:26,258 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1014 transitions. [2022-04-06 20:43:26,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:43:26,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:26,258 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:26,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:26,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-06 20:43:26,459 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:26,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1106017295, now seen corresponding path program 65 times [2022-04-06 20:43:26,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:26,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [726239430] [2022-04-06 20:43:26,460 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:26,460 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:26,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1106017295, now seen corresponding path program 66 times [2022-04-06 20:43:26,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:26,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001005968] [2022-04-06 20:43:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:26,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:27,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:27,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:27,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001005968] [2022-04-06 20:43:27,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001005968] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:27,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878261605] [2022-04-06 20:43:27,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:27,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:27,056 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:27,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 20:43:28,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-06 20:43:28,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:28,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 20:43:28,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:29,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:30,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878261605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:30,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:30,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 20:43:30,823 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:30,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [726239430] [2022-04-06 20:43:30,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [726239430] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:30,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:30,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:43:30,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813705960] [2022-04-06 20:43:30,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:30,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:43:30,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:30,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:43:30,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=4099, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:43:30,825 INFO L87 Difference]: Start difference. First operand 775 states and 1014 transitions. Second operand has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 37 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:43,833 INFO L93 Difference]: Finished difference Result 1850 states and 2642 transitions. [2022-04-06 20:43:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:43:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 37 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:43:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:43,835 INFO L225 Difference]: With dead ends: 1850 [2022-04-06 20:43:43,835 INFO L226 Difference]: Without dead ends: 1800 [2022-04-06 20:43:43,835 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2635, Invalid=9137, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:43:43,836 INFO L913 BasicCegarLoop]: 225 mSDtfsCounter, 368 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 12070 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 12261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 12070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:43,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 402 Invalid, 12261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 12070 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:43:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-04-06 20:43:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 796. [2022-04-06 20:43:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 791 states have (on average 1.316055625790139) internal successors, (1041), 791 states have internal predecessors, (1041), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1045 transitions. [2022-04-06 20:43:44,462 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1045 transitions. Word has length 49 [2022-04-06 20:43:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:44,462 INFO L478 AbstractCegarLoop]: Abstraction has 796 states and 1045 transitions. [2022-04-06 20:43:44,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 37 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1045 transitions. [2022-04-06 20:43:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:43:44,463 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:44,463 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:44,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-04-06 20:43:44,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 20:43:44,665 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:44,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1681374526, now seen corresponding path program 55 times [2022-04-06 20:43:44,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:44,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [494393836] [2022-04-06 20:43:44,666 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:44,666 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1681374526, now seen corresponding path program 56 times [2022-04-06 20:43:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:44,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643200758] [2022-04-06 20:43:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:44,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:45,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:43:45,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:45,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643200758] [2022-04-06 20:43:45,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643200758] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:45,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203021905] [2022-04-06 20:43:45,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:45,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:45,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:45,009 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:45,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 20:43:45,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:45,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:45,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:43:45,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 30 proven. 100 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:43:45,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 30 proven. 100 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:43:45,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203021905] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:45,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:45,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13, 13] total 38 [2022-04-06 20:43:45,481 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:45,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [494393836] [2022-04-06 20:43:45,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [494393836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:45,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:45,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:43:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697310162] [2022-04-06 20:43:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:45,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:43:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:43:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1323, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:43:45,482 INFO L87 Difference]: Start difference. First operand 796 states and 1045 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:51,265 INFO L93 Difference]: Finished difference Result 1075 states and 1402 transitions. [2022-04-06 20:43:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:43:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:43:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:51,267 INFO L225 Difference]: With dead ends: 1075 [2022-04-06 20:43:51,267 INFO L226 Difference]: Without dead ends: 1055 [2022-04-06 20:43:51,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=531, Invalid=9771, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:43:51,268 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 120 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2940 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:51,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 162 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2940 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:43:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-04-06 20:43:51,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 797. [2022-04-06 20:43:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 792 states have (on average 1.3156565656565657) internal successors, (1042), 792 states have internal predecessors, (1042), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1046 transitions. [2022-04-06 20:43:51,909 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1046 transitions. Word has length 50 [2022-04-06 20:43:51,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:51,909 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 1046 transitions. [2022-04-06 20:43:51,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1046 transitions. [2022-04-06 20:43:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:43:51,910 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:51,910 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:51,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-04-06 20:43:52,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-04-06 20:43:52,111 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:52,111 INFO L85 PathProgramCache]: Analyzing trace with hash 346736564, now seen corresponding path program 65 times [2022-04-06 20:43:52,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:52,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746738499] [2022-04-06 20:43:52,112 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:52,112 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash 346736564, now seen corresponding path program 66 times [2022-04-06 20:43:52,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:52,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739828250] [2022-04-06 20:43:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:52,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:52,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-04-06 20:43:52,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:52,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739828250] [2022-04-06 20:43:52,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739828250] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:52,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489592] [2022-04-06 20:43:52,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:52,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:52,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:52,349 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:52,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 20:43:52,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:43:52,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:43:52,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-04-06 20:43:53,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-04-06 20:43:53,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489592] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:53,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:53,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:43:53,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:53,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746738499] [2022-04-06 20:43:53,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746738499] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:53,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:53,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:43:53,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770373812] [2022-04-06 20:43:53,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:53,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:43:53,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:53,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:43:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:43:53,530 INFO L87 Difference]: Start difference. First operand 797 states and 1046 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:58,651 INFO L93 Difference]: Finished difference Result 1185 states and 1517 transitions. [2022-04-06 20:43:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:43:58,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:43:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:58,653 INFO L225 Difference]: With dead ends: 1185 [2022-04-06 20:43:58,653 INFO L226 Difference]: Without dead ends: 1160 [2022-04-06 20:43:58,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=4021, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:43:58,653 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 135 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:58,653 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 160 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:43:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-04-06 20:43:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 797. [2022-04-06 20:43:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 792 states have (on average 1.3143939393939394) internal successors, (1041), 792 states have internal predecessors, (1041), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1045 transitions. [2022-04-06 20:43:59,288 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1045 transitions. Word has length 50 [2022-04-06 20:43:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:59,288 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 1045 transitions. [2022-04-06 20:43:59,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1045 transitions. [2022-04-06 20:43:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:43:59,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:59,289 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:59,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-04-06 20:43:59,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-04-06 20:43:59,489 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:59,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2001735454, now seen corresponding path program 67 times [2022-04-06 20:43:59,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:59,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1334920664] [2022-04-06 20:43:59,490 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:59,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2001735454, now seen corresponding path program 68 times [2022-04-06 20:43:59,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:59,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614657205] [2022-04-06 20:43:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:59,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 20:43:59,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:59,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614657205] [2022-04-06 20:43:59,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614657205] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:59,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461486100] [2022-04-06 20:43:59,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:59,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:59,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:59,732 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:59,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 20:43:59,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:59,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:59,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:43:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:44:00,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:44:01,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461486100] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:01,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:01,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 32, 32] total 64 [2022-04-06 20:44:01,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:01,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1334920664] [2022-04-06 20:44:01,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1334920664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:01,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:01,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:44:01,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606614915] [2022-04-06 20:44:01,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:01,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:44:01,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:44:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:44:01,123 INFO L87 Difference]: Start difference. First operand 797 states and 1045 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:06,921 INFO L93 Difference]: Finished difference Result 1230 states and 1568 transitions. [2022-04-06 20:44:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:44:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:44:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:06,926 INFO L225 Difference]: With dead ends: 1230 [2022-04-06 20:44:06,927 INFO L226 Difference]: Without dead ends: 1205 [2022-04-06 20:44:06,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1192, Invalid=6640, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:44:06,927 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 145 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:06,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 178 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2427 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:44:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-04-06 20:44:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 797. [2022-04-06 20:44:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 792 states have (on average 1.3131313131313131) internal successors, (1040), 792 states have internal predecessors, (1040), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1044 transitions. [2022-04-06 20:44:07,640 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1044 transitions. Word has length 50 [2022-04-06 20:44:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:07,640 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 1044 transitions. [2022-04-06 20:44:07,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1044 transitions. [2022-04-06 20:44:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:44:07,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:07,641 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:07,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-04-06 20:44:07,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:07,843 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:07,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:07,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2078927348, now seen corresponding path program 69 times [2022-04-06 20:44:07,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:07,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1091950531] [2022-04-06 20:44:07,844 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:07,844 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:07,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2078927348, now seen corresponding path program 70 times [2022-04-06 20:44:07,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:07,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067767104] [2022-04-06 20:44:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:07,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:08,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 20:44:08,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:08,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067767104] [2022-04-06 20:44:08,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067767104] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:08,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860591352] [2022-04-06 20:44:08,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:08,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:08,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:08,087 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:08,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 20:44:08,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:08,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:08,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:44:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 20:44:08,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 20:44:08,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860591352] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:08,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:08,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:44:08,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:08,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1091950531] [2022-04-06 20:44:08,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1091950531] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:08,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:08,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:44:08,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746830165] [2022-04-06 20:44:08,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:08,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:44:08,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:44:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:44:08,914 INFO L87 Difference]: Start difference. First operand 797 states and 1044 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:14,705 INFO L93 Difference]: Finished difference Result 1276 states and 1620 transitions. [2022-04-06 20:44:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:44:14,706 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:44:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:14,707 INFO L225 Difference]: With dead ends: 1276 [2022-04-06 20:44:14,707 INFO L226 Difference]: Without dead ends: 1251 [2022-04-06 20:44:14,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=822, Invalid=3210, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:44:14,707 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 156 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2571 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:14,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 186 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2571 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:44:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-04-06 20:44:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 797. [2022-04-06 20:44:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 792 states have (on average 1.3118686868686869) internal successors, (1039), 792 states have internal predecessors, (1039), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1043 transitions. [2022-04-06 20:44:15,353 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1043 transitions. Word has length 50 [2022-04-06 20:44:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:15,353 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 1043 transitions. [2022-04-06 20:44:15,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1043 transitions. [2022-04-06 20:44:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:44:15,354 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:15,354 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:15,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-04-06 20:44:15,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:15,555 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:15,555 INFO L85 PathProgramCache]: Analyzing trace with hash 132351650, now seen corresponding path program 71 times [2022-04-06 20:44:15,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:15,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1774430678] [2022-04-06 20:44:15,556 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:15,556 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash 132351650, now seen corresponding path program 72 times [2022-04-06 20:44:15,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:15,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474369481] [2022-04-06 20:44:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:15,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:15,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-04-06 20:44:15,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:15,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474369481] [2022-04-06 20:44:15,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474369481] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:15,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652874369] [2022-04-06 20:44:15,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:15,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:15,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:15,807 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:15,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 20:44:15,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:44:15,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:15,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:44:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-04-06 20:44:16,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-04-06 20:44:16,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652874369] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:16,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:16,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 6, 6] total 28 [2022-04-06 20:44:16,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1774430678] [2022-04-06 20:44:16,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1774430678] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:16,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:16,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:44:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663470254] [2022-04-06 20:44:16,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:16,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:44:16,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:44:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:44:16,112 INFO L87 Difference]: Start difference. First operand 797 states and 1043 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:22,345 INFO L93 Difference]: Finished difference Result 1323 states and 1673 transitions. [2022-04-06 20:44:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:44:22,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:44:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:22,347 INFO L225 Difference]: With dead ends: 1323 [2022-04-06 20:44:22,347 INFO L226 Difference]: Without dead ends: 1298 [2022-04-06 20:44:22,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=2091, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:44:22,348 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 172 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:22,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 199 Invalid, 2979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2894 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:44:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-04-06 20:44:23,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 797. [2022-04-06 20:44:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 792 states have (on average 1.3106060606060606) internal successors, (1038), 792 states have internal predecessors, (1038), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1042 transitions. [2022-04-06 20:44:23,055 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1042 transitions. Word has length 50 [2022-04-06 20:44:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:23,055 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 1042 transitions. [2022-04-06 20:44:23,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1042 transitions. [2022-04-06 20:44:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:44:23,056 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:23,056 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:23,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-04-06 20:44:23,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:23,257 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1927111518, now seen corresponding path program 67 times [2022-04-06 20:44:23,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:23,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1618933962] [2022-04-06 20:44:23,258 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:23,258 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:23,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1927111518, now seen corresponding path program 68 times [2022-04-06 20:44:23,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:23,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933142781] [2022-04-06 20:44:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:23,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:23,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:23,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:23,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933142781] [2022-04-06 20:44:23,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933142781] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:23,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730123914] [2022-04-06 20:44:23,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:23,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:23,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:23,879 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:23,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 20:44:23,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:23,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:44:23,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:24,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:25,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730123914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:25,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:25,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:44:25,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:25,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1618933962] [2022-04-06 20:44:25,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1618933962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:25,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:25,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:44:25,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949528624] [2022-04-06 20:44:25,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:25,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:44:25,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:44:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4324, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:44:25,787 INFO L87 Difference]: Start difference. First operand 797 states and 1042 transitions. Second operand has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:39,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:39,839 INFO L93 Difference]: Finished difference Result 1901 states and 2715 transitions. [2022-04-06 20:44:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:44:39,840 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:44:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:39,841 INFO L225 Difference]: With dead ends: 1901 [2022-04-06 20:44:39,841 INFO L226 Difference]: Without dead ends: 1851 [2022-04-06 20:44:39,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2782, Invalid=9650, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:44:39,842 INFO L913 BasicCegarLoop]: 232 mSDtfsCounter, 378 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 12810 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 13004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 12810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:39,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 414 Invalid, 13004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 12810 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 20:44:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2022-04-06 20:44:40,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 818. [2022-04-06 20:44:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 813 states have (on average 1.3148831488314883) internal successors, (1069), 813 states have internal predecessors, (1069), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1073 transitions. [2022-04-06 20:44:40,521 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1073 transitions. Word has length 50 [2022-04-06 20:44:40,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:40,521 INFO L478 AbstractCegarLoop]: Abstraction has 818 states and 1073 transitions. [2022-04-06 20:44:40,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1073 transitions. [2022-04-06 20:44:40,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:44:40,522 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:40,522 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:40,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-04-06 20:44:40,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:40,722 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:40,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1540323473, now seen corresponding path program 21 times [2022-04-06 20:44:40,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:40,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1557509559] [2022-04-06 20:44:40,723 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:40,723 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1540323473, now seen corresponding path program 22 times [2022-04-06 20:44:40,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:40,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484325112] [2022-04-06 20:44:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:40,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:41,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:44:41,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:41,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484325112] [2022-04-06 20:44:41,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484325112] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:41,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155805216] [2022-04-06 20:44:41,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:41,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:41,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:41,339 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:41,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 20:44:41,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:41,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:44:41,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:44:41,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:44:42,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155805216] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:42,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:42,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 37 [2022-04-06 20:44:42,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1557509559] [2022-04-06 20:44:42,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1557509559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:42,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:42,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:44:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088570975] [2022-04-06 20:44:42,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:42,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:44:42,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:42,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:44:42,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:44:42,667 INFO L87 Difference]: Start difference. First operand 818 states and 1073 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:44,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 20:44:46,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 20:44:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:48,247 INFO L93 Difference]: Finished difference Result 832 states and 1087 transitions. [2022-04-06 20:44:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:44:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:44:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:48,249 INFO L225 Difference]: With dead ends: 832 [2022-04-06 20:44:48,249 INFO L226 Difference]: Without dead ends: 819 [2022-04-06 20:44:48,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 81 SyntacticMatches, 21 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=227, Invalid=2635, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:44:48,249 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:48,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 83 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 571 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 20:44:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-04-06 20:44:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 819. [2022-04-06 20:44:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 814 states have (on average 1.3144963144963144) internal successors, (1070), 814 states have internal predecessors, (1070), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1074 transitions. [2022-04-06 20:44:48,923 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1074 transitions. Word has length 51 [2022-04-06 20:44:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:48,923 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1074 transitions. [2022-04-06 20:44:48,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1074 transitions. [2022-04-06 20:44:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:44:48,924 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:48,924 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:48,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:49,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:49,126 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1460189680, now seen corresponding path program 57 times [2022-04-06 20:44:49,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:49,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1002972233] [2022-04-06 20:44:49,127 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:49,127 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1460189680, now seen corresponding path program 58 times [2022-04-06 20:44:49,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:49,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368624789] [2022-04-06 20:44:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:49,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:44:49,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:49,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368624789] [2022-04-06 20:44:49,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368624789] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:49,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840980308] [2022-04-06 20:44:49,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:49,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:49,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:49,487 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:49,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 20:44:49,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:49,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:49,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:44:49,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 121 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:44:49,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 121 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:44:49,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840980308] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:49,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:49,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14, 14] total 40 [2022-04-06 20:44:49,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:49,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1002972233] [2022-04-06 20:44:49,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1002972233] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:49,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:49,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:44:49,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977038106] [2022-04-06 20:44:49,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:49,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:44:49,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:44:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1472, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:44:49,997 INFO L87 Difference]: Start difference. First operand 819 states and 1074 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:56,405 INFO L93 Difference]: Finished difference Result 1097 states and 1429 transitions. [2022-04-06 20:44:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:44:56,406 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:44:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:56,407 INFO L225 Difference]: With dead ends: 1097 [2022-04-06 20:44:56,407 INFO L226 Difference]: Without dead ends: 1077 [2022-04-06 20:44:56,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=584, Invalid=11406, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:44:56,407 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 113 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3565 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:56,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 182 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3565 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:44:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-04-06 20:44:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 820. [2022-04-06 20:44:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 815 states have (on average 1.3141104294478527) internal successors, (1071), 815 states have internal predecessors, (1071), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1075 transitions. [2022-04-06 20:44:57,081 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1075 transitions. Word has length 51 [2022-04-06 20:44:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:57,081 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1075 transitions. [2022-04-06 20:44:57,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1075 transitions. [2022-04-06 20:44:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:44:57,082 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:57,082 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:57,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-04-06 20:44:57,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-04-06 20:44:57,282 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1633430624, now seen corresponding path program 59 times [2022-04-06 20:44:57,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:57,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1648608983] [2022-04-06 20:44:57,283 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:57,283 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1633430624, now seen corresponding path program 60 times [2022-04-06 20:44:57,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:57,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395516925] [2022-04-06 20:44:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:57,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:57,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:44:57,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:57,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395516925] [2022-04-06 20:44:57,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395516925] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:57,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785361381] [2022-04-06 20:44:57,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:57,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:57,626 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:57,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 20:44:58,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:44:58,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:58,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:44:58,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:44:58,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:44:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785361381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:58,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:58,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:44:58,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1648608983] [2022-04-06 20:44:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1648608983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:58,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:58,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:44:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680217438] [2022-04-06 20:44:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:58,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:44:58,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:58,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:44:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:44:58,862 INFO L87 Difference]: Start difference. First operand 820 states and 1075 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:05,106 INFO L93 Difference]: Finished difference Result 1191 states and 1530 transitions. [2022-04-06 20:45:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:45:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:45:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:05,107 INFO L225 Difference]: With dead ends: 1191 [2022-04-06 20:45:05,107 INFO L226 Difference]: Without dead ends: 1099 [2022-04-06 20:45:05,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2102, Invalid=11008, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:45:05,108 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 133 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3282 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 3282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:05,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 178 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 3282 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:45:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-04-06 20:45:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 821. [2022-04-06 20:45:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 816 states have (on average 1.3088235294117647) internal successors, (1068), 816 states have internal predecessors, (1068), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1072 transitions. [2022-04-06 20:45:05,783 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1072 transitions. Word has length 51 [2022-04-06 20:45:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:05,783 INFO L478 AbstractCegarLoop]: Abstraction has 821 states and 1072 transitions. [2022-04-06 20:45:05,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1072 transitions. [2022-04-06 20:45:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:45:05,784 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:05,784 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:05,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:05,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-06 20:45:05,984 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1464824209, now seen corresponding path program 69 times [2022-04-06 20:45:05,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:05,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1491802401] [2022-04-06 20:45:05,985 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:05,985 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1464824209, now seen corresponding path program 70 times [2022-04-06 20:45:05,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:05,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552833802] [2022-04-06 20:45:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:05,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:06,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:06,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:06,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552833802] [2022-04-06 20:45:06,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552833802] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:06,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171675290] [2022-04-06 20:45:06,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:06,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:06,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:06,667 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:06,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 20:45:06,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:06,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:45:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:06,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:08,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171675290] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:08,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:08,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 20:45:08,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:08,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1491802401] [2022-04-06 20:45:08,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1491802401] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:08,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:08,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:45:08,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526629930] [2022-04-06 20:45:08,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:08,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:45:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:45:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1451, Invalid=4555, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:45:08,730 INFO L87 Difference]: Start difference. First operand 821 states and 1072 transitions. Second operand has 40 states, 40 states have (on average 1.175) internal successors, (47), 39 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:23,777 INFO L93 Difference]: Finished difference Result 1953 states and 2788 transitions. [2022-04-06 20:45:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:45:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 39 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:45:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:23,779 INFO L225 Difference]: With dead ends: 1953 [2022-04-06 20:45:23,779 INFO L226 Difference]: Without dead ends: 1903 [2022-04-06 20:45:23,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2933, Invalid=10177, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:45:23,780 INFO L913 BasicCegarLoop]: 239 mSDtfsCounter, 395 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 13572 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 13776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 13572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:23,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 426 Invalid, 13776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 13572 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 20:45:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2022-04-06 20:45:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 842. [2022-04-06 20:45:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 837 states have (on average 1.3130227001194743) internal successors, (1099), 837 states have internal predecessors, (1099), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1103 transitions. [2022-04-06 20:45:24,459 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1103 transitions. Word has length 51 [2022-04-06 20:45:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:24,459 INFO L478 AbstractCegarLoop]: Abstraction has 842 states and 1103 transitions. [2022-04-06 20:45:24,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 39 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1103 transitions. [2022-04-06 20:45:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:45:24,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:24,460 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:24,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-04-06 20:45:24,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-04-06 20:45:24,661 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:24,661 INFO L85 PathProgramCache]: Analyzing trace with hash -951962941, now seen corresponding path program 23 times [2022-04-06 20:45:24,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:24,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467021097] [2022-04-06 20:45:24,662 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:24,662 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:24,662 INFO L85 PathProgramCache]: Analyzing trace with hash -951962941, now seen corresponding path program 24 times [2022-04-06 20:45:24,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:24,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821938564] [2022-04-06 20:45:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:24,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:24,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:45:24,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:24,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821938564] [2022-04-06 20:45:24,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821938564] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:24,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746536600] [2022-04-06 20:45:24,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:24,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:24,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:24,774 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:24,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 20:45:25,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:45:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:25,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:45:25,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:45:25,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:45:25,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746536600] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:25,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:25,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-04-06 20:45:25,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:25,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467021097] [2022-04-06 20:45:25,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467021097] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:25,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:25,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:45:25,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643832647] [2022-04-06 20:45:25,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:25,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:45:25,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:25,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:45:25,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:45:25,526 INFO L87 Difference]: Start difference. First operand 842 states and 1103 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:27,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:27,328 INFO L93 Difference]: Finished difference Result 915 states and 1188 transitions. [2022-04-06 20:45:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:45:27,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:45:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:27,329 INFO L225 Difference]: With dead ends: 915 [2022-04-06 20:45:27,330 INFO L226 Difference]: Without dead ends: 873 [2022-04-06 20:45:27,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:45:27,330 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 47 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:27,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 97 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:45:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-04-06 20:45:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 818. [2022-04-06 20:45:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 813 states have (on average 1.3198031980319804) internal successors, (1073), 813 states have internal predecessors, (1073), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1077 transitions. [2022-04-06 20:45:27,988 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1077 transitions. Word has length 52 [2022-04-06 20:45:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:27,988 INFO L478 AbstractCegarLoop]: Abstraction has 818 states and 1077 transitions. [2022-04-06 20:45:27,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1077 transitions. [2022-04-06 20:45:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:45:27,989 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:27,989 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:27,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:28,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-06 20:45:28,189 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1644607011, now seen corresponding path program 17 times [2022-04-06 20:45:28,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:28,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1577073004] [2022-04-06 20:45:28,190 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:28,190 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1644607011, now seen corresponding path program 18 times [2022-04-06 20:45:28,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:28,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322339903] [2022-04-06 20:45:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:28,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:28,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:45:28,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:28,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322339903] [2022-04-06 20:45:28,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322339903] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:28,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937538522] [2022-04-06 20:45:28,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:28,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:28,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:28,432 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:28,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 20:45:28,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:45:28,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:28,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:45:28,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:45:28,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:45:28,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937538522] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:28,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:28,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 30 [2022-04-06 20:45:28,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:28,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1577073004] [2022-04-06 20:45:28,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1577073004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:28,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:28,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:45:28,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783340350] [2022-04-06 20:45:28,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:28,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:45:28,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:28,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:45:28,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:45:28,978 INFO L87 Difference]: Start difference. First operand 818 states and 1077 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:32,258 INFO L93 Difference]: Finished difference Result 1008 states and 1365 transitions. [2022-04-06 20:45:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:45:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:45:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:32,259 INFO L225 Difference]: With dead ends: 1008 [2022-04-06 20:45:32,259 INFO L226 Difference]: Without dead ends: 992 [2022-04-06 20:45:32,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=491, Invalid=1765, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:45:32,259 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 149 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:32,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 94 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:45:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-04-06 20:45:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 890. [2022-04-06 20:45:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 885 states have (on average 1.3220338983050848) internal successors, (1170), 885 states have internal predecessors, (1170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1174 transitions. [2022-04-06 20:45:33,057 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1174 transitions. Word has length 52 [2022-04-06 20:45:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:33,057 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 1174 transitions. [2022-04-06 20:45:33,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1174 transitions. [2022-04-06 20:45:33,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:45:33,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:33,058 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:33,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-04-06 20:45:33,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:33,259 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1101573250, now seen corresponding path program 61 times [2022-04-06 20:45:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:33,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1757299052] [2022-04-06 20:45:33,260 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:33,260 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1101573250, now seen corresponding path program 62 times [2022-04-06 20:45:33,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:33,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399427077] [2022-04-06 20:45:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:33,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:33,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:33,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:33,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399427077] [2022-04-06 20:45:33,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399427077] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:33,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127728489] [2022-04-06 20:45:33,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:33,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:33,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:33,693 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:33,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 20:45:33,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:33,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:45:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:45:34,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:45:34,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127728489] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:34,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:34,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15, 15] total 43 [2022-04-06 20:45:34,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:34,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1757299052] [2022-04-06 20:45:34,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1757299052] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:34,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:34,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:45:34,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873608914] [2022-04-06 20:45:34,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:34,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:45:34,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:45:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:45:34,269 INFO L87 Difference]: Start difference. First operand 890 states and 1174 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:48,104 INFO L93 Difference]: Finished difference Result 1326 states and 1843 transitions. [2022-04-06 20:45:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-04-06 20:45:48,105 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:45:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:48,106 INFO L225 Difference]: With dead ends: 1326 [2022-04-06 20:45:48,106 INFO L226 Difference]: Without dead ends: 1305 [2022-04-06 20:45:48,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18751 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1385, Invalid=55021, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 20:45:48,109 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 202 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 11247 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 12053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 11247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:48,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 214 Invalid, 12053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 11247 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 20:45:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2022-04-06 20:45:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 905. [2022-04-06 20:45:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 900 states have (on average 1.3166666666666667) internal successors, (1185), 900 states have internal predecessors, (1185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1189 transitions. [2022-04-06 20:45:48,980 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1189 transitions. Word has length 52 [2022-04-06 20:45:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:48,980 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1189 transitions. [2022-04-06 20:45:48,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1189 transitions. [2022-04-06 20:45:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:45:48,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:48,981 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:48,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:49,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:49,182 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1456634444, now seen corresponding path program 63 times [2022-04-06 20:45:49,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:49,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [285857566] [2022-04-06 20:45:49,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:49,183 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1456634444, now seen corresponding path program 64 times [2022-04-06 20:45:49,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:49,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061572232] [2022-04-06 20:45:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:49,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:49,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:45:49,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:49,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061572232] [2022-04-06 20:45:49,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061572232] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:49,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062141357] [2022-04-06 20:45:49,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:49,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:49,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:49,552 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:49,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 20:45:49,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:49,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:49,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:45:49,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 100 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:45:49,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 100 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:45:50,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062141357] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:50,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:50,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13, 13] total 39 [2022-04-06 20:45:50,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [285857566] [2022-04-06 20:45:50,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [285857566] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:50,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:50,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:45:50,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485696866] [2022-04-06 20:45:50,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:50,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:45:50,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:45:50,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:45:50,043 INFO L87 Difference]: Start difference. First operand 905 states and 1189 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:57,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:57,409 INFO L93 Difference]: Finished difference Result 1218 states and 1585 transitions. [2022-04-06 20:45:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:45:57,410 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:45:57,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:57,411 INFO L225 Difference]: With dead ends: 1218 [2022-04-06 20:45:57,411 INFO L226 Difference]: Without dead ends: 1197 [2022-04-06 20:45:57,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=537, Invalid=10175, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:45:57,412 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 121 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 3455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:57,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 181 Invalid, 3635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:45:57,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2022-04-06 20:45:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 906. [2022-04-06 20:45:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 901 states have (on average 1.316315205327414) internal successors, (1186), 901 states have internal predecessors, (1186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1190 transitions. [2022-04-06 20:45:58,265 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1190 transitions. Word has length 52 [2022-04-06 20:45:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:58,265 INFO L478 AbstractCegarLoop]: Abstraction has 906 states and 1190 transitions. [2022-04-06 20:45:58,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1190 transitions. [2022-04-06 20:45:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:45:58,266 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:58,266 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:58,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:58,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-06 20:45:58,466 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:58,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1404010878, now seen corresponding path program 73 times [2022-04-06 20:45:58,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:58,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350799497] [2022-04-06 20:45:58,467 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:58,467 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1404010878, now seen corresponding path program 74 times [2022-04-06 20:45:58,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:58,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941838926] [2022-04-06 20:45:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:58,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:58,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:45:58,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:58,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941838926] [2022-04-06 20:45:58,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941838926] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:58,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038171531] [2022-04-06 20:45:58,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:58,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:58,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:58,729 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:58,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 20:45:58,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:58,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:58,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:45:58,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:45:59,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:46:00,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038171531] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:00,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:00,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32, 32] total 64 [2022-04-06 20:46:00,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:00,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350799497] [2022-04-06 20:46:00,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350799497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:00,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:00,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:46:00,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638134897] [2022-04-06 20:46:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:00,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:46:00,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:46:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:46:00,152 INFO L87 Difference]: Start difference. First operand 906 states and 1190 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:07,126 INFO L93 Difference]: Finished difference Result 1358 states and 1730 transitions. [2022-04-06 20:46:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:46:07,127 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:46:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:07,128 INFO L225 Difference]: With dead ends: 1358 [2022-04-06 20:46:07,128 INFO L226 Difference]: Without dead ends: 1332 [2022-04-06 20:46:07,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1366, Invalid=7376, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:46:07,129 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 134 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:07,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 169 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:46:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2022-04-06 20:46:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 906. [2022-04-06 20:46:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 901 states have (on average 1.3152053274139845) internal successors, (1185), 901 states have internal predecessors, (1185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1189 transitions. [2022-04-06 20:46:07,999 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1189 transitions. Word has length 52 [2022-04-06 20:46:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:08,000 INFO L478 AbstractCegarLoop]: Abstraction has 906 states and 1189 transitions. [2022-04-06 20:46:08,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1189 transitions. [2022-04-06 20:46:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:46:08,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:08,001 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:08,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-04-06 20:46:08,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-04-06 20:46:08,201 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:08,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:08,201 INFO L85 PathProgramCache]: Analyzing trace with hash -80155886, now seen corresponding path program 75 times [2022-04-06 20:46:08,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:08,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1246526718] [2022-04-06 20:46:08,202 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:08,202 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:08,202 INFO L85 PathProgramCache]: Analyzing trace with hash -80155886, now seen corresponding path program 76 times [2022-04-06 20:46:08,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:08,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210458130] [2022-04-06 20:46:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:08,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:08,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:46:08,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:08,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210458130] [2022-04-06 20:46:08,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210458130] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:08,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042918890] [2022-04-06 20:46:08,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:08,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:08,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:08,464 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:08,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 20:46:08,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:08,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:08,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:46:08,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:46:08,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:46:09,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042918890] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:09,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:09,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:46:09,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:09,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1246526718] [2022-04-06 20:46:09,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1246526718] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:09,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:09,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:46:09,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412520531] [2022-04-06 20:46:09,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:09,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:46:09,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:09,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:46:09,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:46:09,203 INFO L87 Difference]: Start difference. First operand 906 states and 1189 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:16,448 INFO L93 Difference]: Finished difference Result 1406 states and 1784 transitions. [2022-04-06 20:46:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:46:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:46:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:16,449 INFO L225 Difference]: With dead ends: 1406 [2022-04-06 20:46:16,449 INFO L226 Difference]: Without dead ends: 1380 [2022-04-06 20:46:16,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=949, Invalid=3881, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:46:16,450 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:16,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 182 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:46:16,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-04-06 20:46:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 906. [2022-04-06 20:46:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 901 states have (on average 1.314095449500555) internal successors, (1184), 901 states have internal predecessors, (1184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1188 transitions. [2022-04-06 20:46:17,309 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1188 transitions. Word has length 52 [2022-04-06 20:46:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:17,309 INFO L478 AbstractCegarLoop]: Abstraction has 906 states and 1188 transitions. [2022-04-06 20:46:17,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:17,309 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1188 transitions. [2022-04-06 20:46:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:46:17,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:17,310 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:17,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:17,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:17,511 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:17,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:17,511 INFO L85 PathProgramCache]: Analyzing trace with hash 239643778, now seen corresponding path program 77 times [2022-04-06 20:46:17,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:17,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1636731942] [2022-04-06 20:46:17,512 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:17,512 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:17,512 INFO L85 PathProgramCache]: Analyzing trace with hash 239643778, now seen corresponding path program 78 times [2022-04-06 20:46:17,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:17,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877373747] [2022-04-06 20:46:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:17,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:17,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 20:46:17,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:17,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877373747] [2022-04-06 20:46:17,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877373747] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:17,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527649864] [2022-04-06 20:46:17,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:17,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:17,781 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:17,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 20:46:18,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:46:18,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:18,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:46:18,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 20:46:18,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 43 proven. 5 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 20:46:18,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527649864] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:18,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:18,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8, 8] total 34 [2022-04-06 20:46:18,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:18,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1636731942] [2022-04-06 20:46:18,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1636731942] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:18,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:18,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:46:18,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202923561] [2022-04-06 20:46:18,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:18,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:46:18,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:46:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:46:18,831 INFO L87 Difference]: Start difference. First operand 906 states and 1188 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:26,660 INFO L93 Difference]: Finished difference Result 1455 states and 1839 transitions. [2022-04-06 20:46:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:46:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:46:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:26,662 INFO L225 Difference]: With dead ends: 1455 [2022-04-06 20:46:26,662 INFO L226 Difference]: Without dead ends: 1429 [2022-04-06 20:46:26,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=251, Invalid=2941, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:46:26,662 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 155 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3005 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 3087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:26,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 200 Invalid, 3087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3005 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:46:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2022-04-06 20:46:27,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 906. [2022-04-06 20:46:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 901 states have (on average 1.3129855715871255) internal successors, (1183), 901 states have internal predecessors, (1183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1187 transitions. [2022-04-06 20:46:27,541 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1187 transitions. Word has length 52 [2022-04-06 20:46:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:27,542 INFO L478 AbstractCegarLoop]: Abstraction has 906 states and 1187 transitions. [2022-04-06 20:46:27,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1187 transitions. [2022-04-06 20:46:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:46:27,543 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:27,543 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:27,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:27,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:27,743 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2105344750, now seen corresponding path program 79 times [2022-04-06 20:46:27,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:27,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2124788223] [2022-04-06 20:46:27,744 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:27,744 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2105344750, now seen corresponding path program 80 times [2022-04-06 20:46:27,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:27,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314341031] [2022-04-06 20:46:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:27,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:28,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 20:46:28,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:28,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314341031] [2022-04-06 20:46:28,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314341031] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:28,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072642219] [2022-04-06 20:46:28,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:28,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:28,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:28,003 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:28,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-06 20:46:28,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:28,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:28,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:46:28,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:28,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:46:29,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072642219] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:29,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:29,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 38, 38] total 76 [2022-04-06 20:46:29,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:29,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2124788223] [2022-04-06 20:46:29,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2124788223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:29,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:29,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:46:29,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47758571] [2022-04-06 20:46:29,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:29,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:46:29,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:29,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:46:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=816, Invalid=4884, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:46:29,914 INFO L87 Difference]: Start difference. First operand 906 states and 1187 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:38,241 INFO L93 Difference]: Finished difference Result 1505 states and 1895 transitions. [2022-04-06 20:46:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:46:38,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:46:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:38,243 INFO L225 Difference]: With dead ends: 1505 [2022-04-06 20:46:38,243 INFO L226 Difference]: Without dead ends: 1479 [2022-04-06 20:46:38,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1306, Invalid=8006, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:46:38,243 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 171 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3189 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 3274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:38,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 208 Invalid, 3274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3189 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:46:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2022-04-06 20:46:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 906. [2022-04-06 20:46:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 901 states have (on average 1.311875693673696) internal successors, (1182), 901 states have internal predecessors, (1182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1186 transitions. [2022-04-06 20:46:39,112 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1186 transitions. Word has length 52 [2022-04-06 20:46:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:39,112 INFO L478 AbstractCegarLoop]: Abstraction has 906 states and 1186 transitions. [2022-04-06 20:46:39,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1186 transitions. [2022-04-06 20:46:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:46:39,113 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:39,113 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:39,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-04-06 20:46:39,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:39,313 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash -18819518, now seen corresponding path program 71 times [2022-04-06 20:46:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:39,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1709383667] [2022-04-06 20:46:39,314 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:39,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash -18819518, now seen corresponding path program 72 times [2022-04-06 20:46:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:39,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280498875] [2022-04-06 20:46:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:39,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:40,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:40,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280498875] [2022-04-06 20:46:40,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280498875] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889401476] [2022-04-06 20:46:40,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:40,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:40,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:40,019 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:40,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-06 20:46:48,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 20:46:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:49,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:46:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:49,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:51,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889401476] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:51,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:51,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 20:46:51,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:51,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1709383667] [2022-04-06 20:46:51,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1709383667] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:51,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:51,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:46:51,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110673567] [2022-04-06 20:46:51,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:51,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:46:51,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:51,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:46:51,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1528, Invalid=4792, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:46:51,112 INFO L87 Difference]: Start difference. First operand 906 states and 1186 transitions. Second operand has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:09,133 INFO L93 Difference]: Finished difference Result 2156 states and 3074 transitions. [2022-04-06 20:47:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:47:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:47:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:09,136 INFO L225 Difference]: With dead ends: 2156 [2022-04-06 20:47:09,136 INFO L226 Difference]: Without dead ends: 2101 [2022-04-06 20:47:09,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3088, Invalid=10718, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:47:09,136 INFO L913 BasicCegarLoop]: 243 mSDtfsCounter, 389 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 14208 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 14410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 14208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:09,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 435 Invalid, 14410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 14208 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 20:47:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2022-04-06 20:47:10,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 929. [2022-04-06 20:47:10,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 924 states have (on average 1.316017316017316) internal successors, (1216), 924 states have internal predecessors, (1216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1220 transitions. [2022-04-06 20:47:10,044 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1220 transitions. Word has length 52 [2022-04-06 20:47:10,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:10,045 INFO L478 AbstractCegarLoop]: Abstraction has 929 states and 1220 transitions. [2022-04-06 20:47:10,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:10,045 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1220 transitions. [2022-04-06 20:47:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:47:10,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:10,046 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:10,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:10,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-04-06 20:47:10,246 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:10,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1535596256, now seen corresponding path program 65 times [2022-04-06 20:47:10,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:10,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [978815193] [2022-04-06 20:47:10,247 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:10,247 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1535596256, now seen corresponding path program 66 times [2022-04-06 20:47:10,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:10,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566301748] [2022-04-06 20:47:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:10,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:47:10,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:10,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566301748] [2022-04-06 20:47:10,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566301748] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:10,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472718396] [2022-04-06 20:47:10,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:10,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:10,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:10,659 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:10,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-06 20:47:11,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:47:11,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:11,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 20:47:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:47:11,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 24 proven. 132 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:47:12,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472718396] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:12,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:12,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 26] total 65 [2022-04-06 20:47:12,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:12,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [978815193] [2022-04-06 20:47:12,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [978815193] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:12,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:12,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:47:12,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186996628] [2022-04-06 20:47:12,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:12,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:47:12,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:12,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:47:12,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=3692, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:47:12,691 INFO L87 Difference]: Start difference. First operand 929 states and 1220 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:20,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:20,852 INFO L93 Difference]: Finished difference Result 1242 states and 1616 transitions. [2022-04-06 20:47:20,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:47:20,853 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:47:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:20,855 INFO L225 Difference]: With dead ends: 1242 [2022-04-06 20:47:20,855 INFO L226 Difference]: Without dead ends: 1221 [2022-04-06 20:47:20,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4044 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1632, Invalid=16728, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:47:20,856 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 124 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4114 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 4114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:20,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 201 Invalid, 4307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 4114 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:47:20,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-04-06 20:47:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 930. [2022-04-06 20:47:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 925 states have (on average 1.3156756756756758) internal successors, (1217), 925 states have internal predecessors, (1217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1221 transitions. [2022-04-06 20:47:21,798 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1221 transitions. Word has length 53 [2022-04-06 20:47:21,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:21,798 INFO L478 AbstractCegarLoop]: Abstraction has 930 states and 1221 transitions. [2022-04-06 20:47:21,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:21,798 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1221 transitions. [2022-04-06 20:47:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:47:21,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:21,799 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:21,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:21,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-06 20:47:21,999 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:22,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1857652943, now seen corresponding path program 73 times [2022-04-06 20:47:22,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:22,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1724353407] [2022-04-06 20:47:22,001 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:22,001 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1857652943, now seen corresponding path program 74 times [2022-04-06 20:47:22,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:22,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79121963] [2022-04-06 20:47:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:22,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:22,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:22,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:22,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79121963] [2022-04-06 20:47:22,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79121963] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:22,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104915427] [2022-04-06 20:47:22,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:22,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:22,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:22,727 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:22,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-06 20:47:22,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:22,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:22,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:47:22,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:22,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:25,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104915427] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:25,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:25,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 20:47:25,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:25,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1724353407] [2022-04-06 20:47:25,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1724353407] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:25,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:25,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:47:25,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16875831] [2022-04-06 20:47:25,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:25,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:47:25,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:25,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:47:25,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1607, Invalid=5035, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:47:25,043 INFO L87 Difference]: Start difference. First operand 930 states and 1221 transitions. Second operand has 42 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 41 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:43,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:43,978 INFO L93 Difference]: Finished difference Result 2211 states and 3157 transitions. [2022-04-06 20:47:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:47:43,979 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 41 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:47:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:43,981 INFO L225 Difference]: With dead ends: 2211 [2022-04-06 20:47:43,981 INFO L226 Difference]: Without dead ends: 2156 [2022-04-06 20:47:43,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3247, Invalid=11273, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:47:43,982 INFO L913 BasicCegarLoop]: 250 mSDtfsCounter, 407 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 15009 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 15222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 15009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:43,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 447 Invalid, 15222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 15009 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 20:47:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2022-04-06 20:47:44,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 953. [2022-04-06 20:47:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 948 states have (on average 1.3196202531645569) internal successors, (1251), 948 states have internal predecessors, (1251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1255 transitions. [2022-04-06 20:47:44,880 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1255 transitions. Word has length 53 [2022-04-06 20:47:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:44,880 INFO L478 AbstractCegarLoop]: Abstraction has 953 states and 1255 transitions. [2022-04-06 20:47:44,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 41 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1255 transitions. [2022-04-06 20:47:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:47:44,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:44,881 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:44,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-04-06 20:47:45,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-06 20:47:45,081 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:45,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:45,082 INFO L85 PathProgramCache]: Analyzing trace with hash -194532556, now seen corresponding path program 67 times [2022-04-06 20:47:45,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:45,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796510958] [2022-04-06 20:47:45,082 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:45,082 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:45,082 INFO L85 PathProgramCache]: Analyzing trace with hash -194532556, now seen corresponding path program 68 times [2022-04-06 20:47:45,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:45,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060624749] [2022-04-06 20:47:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:45,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:45,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:47:45,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:45,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060624749] [2022-04-06 20:47:45,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060624749] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:45,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933816085] [2022-04-06 20:47:45,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:45,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:45,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:45,503 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:45,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-06 20:47:45,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:45,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:45,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:47:45,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 24 proven. 144 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:47:46,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 24 proven. 144 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:47:46,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933816085] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:46,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:46,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15, 15] total 43 [2022-04-06 20:47:46,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:46,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796510958] [2022-04-06 20:47:46,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796510958] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:46,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:46,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:47:46,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875482798] [2022-04-06 20:47:46,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:46,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:47:46,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:47:46,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1711, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:47:46,093 INFO L87 Difference]: Start difference. First operand 953 states and 1255 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:54,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:54,571 INFO L93 Difference]: Finished difference Result 1266 states and 1651 transitions. [2022-04-06 20:47:54,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:47:54,571 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:47:54,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:54,572 INFO L225 Difference]: With dead ends: 1266 [2022-04-06 20:47:54,572 INFO L226 Difference]: Without dead ends: 1245 [2022-04-06 20:47:54,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=643, Invalid=13637, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:47:54,573 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 119 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 4670 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 4874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 4670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:54,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 216 Invalid, 4874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 4670 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:47:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-04-06 20:47:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 954. [2022-04-06 20:47:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 949 states have (on average 1.3192834562697577) internal successors, (1252), 949 states have internal predecessors, (1252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:55,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1256 transitions. [2022-04-06 20:47:55,486 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1256 transitions. Word has length 54 [2022-04-06 20:47:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:55,486 INFO L478 AbstractCegarLoop]: Abstraction has 954 states and 1256 transitions. [2022-04-06 20:47:55,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1256 transitions. [2022-04-06 20:47:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:47:55,488 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:55,488 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:55,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:55,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-06 20:47:55,691 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash 19521634, now seen corresponding path program 81 times [2022-04-06 20:47:55,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684277436] [2022-04-06 20:47:55,692 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:55,692 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash 19521634, now seen corresponding path program 82 times [2022-04-06 20:47:55,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250614346] [2022-04-06 20:47:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:55,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:55,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:47:55,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:55,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250614346] [2022-04-06 20:47:55,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250614346] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:55,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131111472] [2022-04-06 20:47:55,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:55,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:55,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:55,980 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:55,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-06 20:47:56,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:56,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:56,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:47:56,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:47:56,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:47:56,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131111472] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:56,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:56,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:47:56,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:56,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684277436] [2022-04-06 20:47:56,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684277436] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:56,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:56,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:47:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486064370] [2022-04-06 20:47:56,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:56,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:47:56,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:47:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:47:56,757 INFO L87 Difference]: Start difference. First operand 954 states and 1256 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:04,457 INFO L93 Difference]: Finished difference Result 1386 states and 1776 transitions. [2022-04-06 20:48:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:48:04,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:48:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:04,459 INFO L225 Difference]: With dead ends: 1386 [2022-04-06 20:48:04,459 INFO L226 Difference]: Without dead ends: 1359 [2022-04-06 20:48:04,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1232, Invalid=5410, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:48:04,460 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 140 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3000 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:04,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 191 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3000 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:48:04,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2022-04-06 20:48:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 954. [2022-04-06 20:48:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 949 states have (on average 1.3182297154899896) internal successors, (1251), 949 states have internal predecessors, (1251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1255 transitions. [2022-04-06 20:48:05,397 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1255 transitions. Word has length 54 [2022-04-06 20:48:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:05,397 INFO L478 AbstractCegarLoop]: Abstraction has 954 states and 1255 transitions. [2022-04-06 20:48:05,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1255 transitions. [2022-04-06 20:48:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:48:05,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:05,398 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:05,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:05,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:05,599 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:05,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:05,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2105407554, now seen corresponding path program 69 times [2022-04-06 20:48:05,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:05,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [378016358] [2022-04-06 20:48:05,599 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:05,600 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:05,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2105407554, now seen corresponding path program 70 times [2022-04-06 20:48:05,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:05,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300550279] [2022-04-06 20:48:05,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:05,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:05,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:48:05,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:05,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300550279] [2022-04-06 20:48:05,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300550279] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:05,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079927214] [2022-04-06 20:48:05,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:05,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:05,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:06,000 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:06,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-06 20:48:06,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:06,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:48:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:48:06,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:48:06,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079927214] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:06,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:06,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13, 13] total 40 [2022-04-06 20:48:06,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:06,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [378016358] [2022-04-06 20:48:06,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [378016358] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:06,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:06,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:48:06,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822643681] [2022-04-06 20:48:06,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:06,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:48:06,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:48:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:48:06,535 INFO L87 Difference]: Start difference. First operand 954 states and 1255 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:15,225 INFO L93 Difference]: Finished difference Result 1367 states and 1758 transitions. [2022-04-06 20:48:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:48:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:48:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:15,227 INFO L225 Difference]: With dead ends: 1367 [2022-04-06 20:48:15,227 INFO L226 Difference]: Without dead ends: 1268 [2022-04-06 20:48:15,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=581, Invalid=11629, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:48:15,228 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 137 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:15,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 197 Invalid, 4252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:48:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-04-06 20:48:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 955. [2022-04-06 20:48:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 950 states have (on average 1.3136842105263158) internal successors, (1248), 950 states have internal predecessors, (1248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1252 transitions. [2022-04-06 20:48:16,184 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1252 transitions. Word has length 54 [2022-04-06 20:48:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:16,184 INFO L478 AbstractCegarLoop]: Abstraction has 955 states and 1252 transitions. [2022-04-06 20:48:16,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1252 transitions. [2022-04-06 20:48:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:48:16,185 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:16,185 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:16,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-04-06 20:48:16,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-04-06 20:48:16,385 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:16,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1047460020, now seen corresponding path program 83 times [2022-04-06 20:48:16,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:16,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [603847340] [2022-04-06 20:48:16,386 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:16,386 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:16,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1047460020, now seen corresponding path program 84 times [2022-04-06 20:48:16,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:16,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317499685] [2022-04-06 20:48:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:16,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:16,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:48:16,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:16,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317499685] [2022-04-06 20:48:16,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317499685] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:16,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049631458] [2022-04-06 20:48:16,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:16,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:16,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:16,670 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:16,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-06 20:48:17,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:48:17,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:17,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:48:17,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:48:17,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:48:18,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049631458] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:18,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:18,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:48:18,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [603847340] [2022-04-06 20:48:18,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [603847340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:18,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:18,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:48:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340651580] [2022-04-06 20:48:18,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:18,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:48:18,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:18,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:48:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:48:18,525 INFO L87 Difference]: Start difference. First operand 955 states and 1252 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:26,567 INFO L93 Difference]: Finished difference Result 1435 states and 1827 transitions. [2022-04-06 20:48:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:48:26,568 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:48:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:26,569 INFO L225 Difference]: With dead ends: 1435 [2022-04-06 20:48:26,569 INFO L226 Difference]: Without dead ends: 1408 [2022-04-06 20:48:26,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1115, Invalid=4737, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:48:26,570 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 150 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2627 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:26,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 181 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2627 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:48:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-04-06 20:48:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 955. [2022-04-06 20:48:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 950 states have (on average 1.3126315789473684) internal successors, (1247), 950 states have internal predecessors, (1247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1251 transitions. [2022-04-06 20:48:27,552 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1251 transitions. Word has length 54 [2022-04-06 20:48:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:27,553 INFO L478 AbstractCegarLoop]: Abstraction has 955 states and 1251 transitions. [2022-04-06 20:48:27,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1251 transitions. [2022-04-06 20:48:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:48:27,553 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:27,553 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:27,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:27,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:27,754 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash 249335330, now seen corresponding path program 85 times [2022-04-06 20:48:27,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:27,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [400997622] [2022-04-06 20:48:27,755 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:27,755 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:27,755 INFO L85 PathProgramCache]: Analyzing trace with hash 249335330, now seen corresponding path program 86 times [2022-04-06 20:48:27,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:27,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761464906] [2022-04-06 20:48:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:27,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 20:48:28,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761464906] [2022-04-06 20:48:28,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761464906] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989017381] [2022-04-06 20:48:28,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:28,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:28,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:28,079 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:28,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-04-06 20:48:28,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:28,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:28,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:48:28,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:48:28,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:48:29,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989017381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:29,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:29,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 36, 36] total 72 [2022-04-06 20:48:29,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:29,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [400997622] [2022-04-06 20:48:29,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [400997622] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:29,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:29,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:48:29,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071377177] [2022-04-06 20:48:29,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:29,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:48:29,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:29,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:48:29,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=4375, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:48:29,839 INFO L87 Difference]: Start difference. First operand 955 states and 1251 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:38,588 INFO L93 Difference]: Finished difference Result 1484 states and 1882 transitions. [2022-04-06 20:48:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:48:38,588 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:48:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:38,590 INFO L225 Difference]: With dead ends: 1484 [2022-04-06 20:48:38,590 INFO L226 Difference]: Without dead ends: 1457 [2022-04-06 20:48:38,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1442, Invalid=8260, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:48:38,590 INFO L913 BasicCegarLoop]: 102 mSDtfsCounter, 160 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3206 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 3301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:38,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 204 Invalid, 3301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:48:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-04-06 20:48:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 955. [2022-04-06 20:48:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 950 states have (on average 1.311578947368421) internal successors, (1246), 950 states have internal predecessors, (1246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1250 transitions. [2022-04-06 20:48:39,521 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1250 transitions. Word has length 54 [2022-04-06 20:48:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:39,521 INFO L478 AbstractCegarLoop]: Abstraction has 955 states and 1250 transitions. [2022-04-06 20:48:39,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1250 transitions. [2022-04-06 20:48:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:48:39,522 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:39,522 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:39,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-04-06 20:48:39,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:39,723 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash -53505292, now seen corresponding path program 87 times [2022-04-06 20:48:39,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:39,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1169587484] [2022-04-06 20:48:39,723 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:39,723 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash -53505292, now seen corresponding path program 88 times [2022-04-06 20:48:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:39,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292418301] [2022-04-06 20:48:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:39,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:39,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:48:40,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:40,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292418301] [2022-04-06 20:48:40,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292418301] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:40,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272659372] [2022-04-06 20:48:40,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:40,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:40,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:40,002 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:40,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-04-06 20:48:40,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:40,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:40,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:48:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:48:40,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:48:40,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272659372] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:40,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:40,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:48:40,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:40,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1169587484] [2022-04-06 20:48:40,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1169587484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:40,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:40,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:48:40,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157453284] [2022-04-06 20:48:40,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:40,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:48:40,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:40,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:48:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:48:40,809 INFO L87 Difference]: Start difference. First operand 955 states and 1250 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:49,754 INFO L93 Difference]: Finished difference Result 1534 states and 1938 transitions. [2022-04-06 20:48:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:48:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:48:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:49,756 INFO L225 Difference]: With dead ends: 1534 [2022-04-06 20:48:49,756 INFO L226 Difference]: Without dead ends: 1507 [2022-04-06 20:48:49,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=986, Invalid=3844, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:48:49,756 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 171 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3381 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:49,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 212 Invalid, 3469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3381 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:48:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-04-06 20:48:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 955. [2022-04-06 20:48:50,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 950 states have (on average 1.3105263157894738) internal successors, (1245), 950 states have internal predecessors, (1245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1249 transitions. [2022-04-06 20:48:50,725 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1249 transitions. Word has length 54 [2022-04-06 20:48:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:50,726 INFO L478 AbstractCegarLoop]: Abstraction has 955 states and 1249 transitions. [2022-04-06 20:48:50,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1249 transitions. [2022-04-06 20:48:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:48:50,726 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:50,727 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:50,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:50,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:50,927 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1864389662, now seen corresponding path program 89 times [2022-04-06 20:48:50,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:50,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [935814463] [2022-04-06 20:48:50,928 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:50,928 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1864389662, now seen corresponding path program 90 times [2022-04-06 20:48:50,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:50,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216609361] [2022-04-06 20:48:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:50,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:51,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 20:48:51,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216609361] [2022-04-06 20:48:51,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216609361] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589528732] [2022-04-06 20:48:51,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:51,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:51,228 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:51,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-04-06 20:48:51,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:48:51,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:51,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:48:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-04-06 20:48:51,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-04-06 20:48:51,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589528732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:51,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:51,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 30 [2022-04-06 20:48:51,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:51,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [935814463] [2022-04-06 20:48:51,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [935814463] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:51,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:51,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:48:51,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470435161] [2022-04-06 20:48:51,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:51,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:48:51,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:51,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:48:51,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:48:51,601 INFO L87 Difference]: Start difference. First operand 955 states and 1249 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:01,033 INFO L93 Difference]: Finished difference Result 1585 states and 1995 transitions. [2022-04-06 20:49:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:49:01,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:49:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:01,035 INFO L225 Difference]: With dead ends: 1585 [2022-04-06 20:49:01,035 INFO L226 Difference]: Without dead ends: 1558 [2022-04-06 20:49:01,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=2475, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:49:01,036 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 187 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 3847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:01,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 225 Invalid, 3847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:49:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-04-06 20:49:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 955. [2022-04-06 20:49:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 950 states have (on average 1.3094736842105263) internal successors, (1244), 950 states have internal predecessors, (1244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1248 transitions. [2022-04-06 20:49:02,103 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1248 transitions. Word has length 54 [2022-04-06 20:49:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:02,103 INFO L478 AbstractCegarLoop]: Abstraction has 955 states and 1248 transitions. [2022-04-06 20:49:02,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1248 transitions. [2022-04-06 20:49:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:49:02,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:02,104 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:02,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-04-06 20:49:02,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:02,305 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:02,305 INFO L85 PathProgramCache]: Analyzing trace with hash -101242910, now seen corresponding path program 75 times [2022-04-06 20:49:02,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:02,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [203318573] [2022-04-06 20:49:02,306 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:02,306 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:02,306 INFO L85 PathProgramCache]: Analyzing trace with hash -101242910, now seen corresponding path program 76 times [2022-04-06 20:49:02,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:02,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110626694] [2022-04-06 20:49:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:02,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:03,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:03,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:03,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110626694] [2022-04-06 20:49:03,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110626694] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:03,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455770626] [2022-04-06 20:49:03,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:03,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:03,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:03,071 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:03,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-04-06 20:49:03,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:03,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:03,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:49:03,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:03,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:05,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455770626] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:05,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:05,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 20:49:05,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:05,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [203318573] [2022-04-06 20:49:05,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [203318573] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:05,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:05,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:49:05,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337651031] [2022-04-06 20:49:05,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:05,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:49:05,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:05,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:49:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1688, Invalid=5284, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:49:05,465 INFO L87 Difference]: Start difference. First operand 955 states and 1248 transitions. Second operand has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:26,315 INFO L93 Difference]: Finished difference Result 2267 states and 3232 transitions. [2022-04-06 20:49:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:49:26,316 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:49:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:26,318 INFO L225 Difference]: With dead ends: 2267 [2022-04-06 20:49:26,318 INFO L226 Difference]: Without dead ends: 2212 [2022-04-06 20:49:26,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3410, Invalid=11842, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:49:26,320 INFO L913 BasicCegarLoop]: 257 mSDtfsCounter, 415 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 15834 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 16048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 15834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:26,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 459 Invalid, 16048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 15834 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-04-06 20:49:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2022-04-06 20:49:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 978. [2022-04-06 20:49:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 973 states have (on average 1.313463514902364) internal successors, (1278), 973 states have internal predecessors, (1278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1282 transitions. [2022-04-06 20:49:27,405 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1282 transitions. Word has length 54 [2022-04-06 20:49:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:27,405 INFO L478 AbstractCegarLoop]: Abstraction has 978 states and 1282 transitions. [2022-04-06 20:49:27,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1282 transitions. [2022-04-06 20:49:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:49:27,406 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:27,406 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:27,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:27,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-04-06 20:49:27,607 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:27,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2006049120, now seen corresponding path program 71 times [2022-04-06 20:49:27,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [418320897] [2022-04-06 20:49:27,608 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:27,608 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2006049120, now seen corresponding path program 72 times [2022-04-06 20:49:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891376880] [2022-04-06 20:49:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:27,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:28,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:28,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891376880] [2022-04-06 20:49:28,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891376880] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264110304] [2022-04-06 20:49:28,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:28,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:28,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:28,084 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:28,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-04-06 20:49:28,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:49:28,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:49:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 20:49:29,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 20:49:30,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264110304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:30,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:30,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16, 16] total 60 [2022-04-06 20:49:30,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:30,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [418320897] [2022-04-06 20:49:30,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [418320897] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:30,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:30,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:49:30,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364404208] [2022-04-06 20:49:30,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:30,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:49:30,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:30,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:49:30,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3227, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:49:30,067 INFO L87 Difference]: Start difference. First operand 978 states and 1282 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)