/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/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:51:07,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:51:07,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:51:07,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:51:07,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:51:07,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:51:07,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:51:07,254 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 20:51:07,261 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:51:07,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:51:07,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:51:07,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:51:07,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:51:07,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:51:07,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:51:07,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:51:07,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:51:07,263 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:51:07,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:51:07,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:51:07,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:51:07,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:51:07,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:51:07,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:51:07,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:51:07,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:51:07,264 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:51:07,265 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:51:07,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:51:07,265 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:51:07,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:51:07,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:51:07,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:51:07,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:51:07,470 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:51:07,471 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:51:07,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-04-06 20:51:07,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63e5d4ea/b888b67b66794c92b730f3875ccac722/FLAG803f56c83 [2022-04-06 20:51:07,862 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:51:07,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-04-06 20:51:07,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63e5d4ea/b888b67b66794c92b730f3875ccac722/FLAG803f56c83 [2022-04-06 20:51:07,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63e5d4ea/b888b67b66794c92b730f3875ccac722 [2022-04-06 20:51:07,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:51:07,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:51:07,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:51:07,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:51:07,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:51:07,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:51:07" (1/1) ... [2022-04-06 20:51:07,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c54038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:07, skipping insertion in model container [2022-04-06 20:51:07,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:51:07" (1/1) ... [2022-04-06 20:51:07,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:51:07,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:51:08,101 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/nested_delay_nd.c[465,478] [2022-04-06 20:51:08,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:51:08,151 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:51:08,166 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/nested_delay_nd.c[465,478] [2022-04-06 20:51:08,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:51:08,189 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:51:08,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:08 WrapperNode [2022-04-06 20:51:08,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:51:08,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:51:08,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:51:08,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:51:08,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:08" (1/1) ... [2022-04-06 20:51:08,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:08" (1/1) ... [2022-04-06 20:51:08,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:08" (1/1) ... [2022-04-06 20:51:08,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:08" (1/1) ... [2022-04-06 20:51:08,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:08" (1/1) ... [2022-04-06 20:51:08,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:08" (1/1) ... [2022-04-06 20:51:08,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:08" (1/1) ... [2022-04-06 20:51:08,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:51:08,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:51:08,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:51:08,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:51:08,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:08" (1/1) ... [2022-04-06 20:51:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:51:08,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:08,252 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 20:51:08,274 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 20:51:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:51:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:51:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:51:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 20:51:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:51:08,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:51:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:51:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:51:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:51:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:51:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 20:51:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 20:51:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:51:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:51:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:51:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:51:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:51:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:51:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:51:08,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:51:08,347 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:51:08,348 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:51:08,479 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:51:08,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:51:08,488 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 20:51:08,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:51:08 BoogieIcfgContainer [2022-04-06 20:51:08,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:51:08,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:51:08,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:51:08,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:51:08,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:51:07" (1/3) ... [2022-04-06 20:51:08,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf8ba87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:51:08, skipping insertion in model container [2022-04-06 20:51:08,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:51:08" (2/3) ... [2022-04-06 20:51:08,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf8ba87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:51:08, skipping insertion in model container [2022-04-06 20:51:08,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:51:08" (3/3) ... [2022-04-06 20:51:08,497 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2022-04-06 20:51:08,500 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:51:08,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:51:08,539 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:51:08,544 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 20:51:08,545 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:51:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:51:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:51:08,562 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:08,563 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 20:51:08,563 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1039138334, now seen corresponding path program 1 times [2022-04-06 20:51:08,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:08,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [492689888] [2022-04-06 20:51:08,585 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:51:08,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1039138334, now seen corresponding path program 2 times [2022-04-06 20:51:08,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:08,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659443779] [2022-04-06 20:51:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:08,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:08,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:08,755 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 20:51:08,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:08,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659443779] [2022-04-06 20:51:08,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659443779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:08,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:08,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:51:08,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [492689888] [2022-04-06 20:51:08,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [492689888] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:08,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:08,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:51:08,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629676924] [2022-04-06 20:51:08,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:08,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:51:08,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:51:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:51:08,797 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:08,894 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2022-04-06 20:51:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:51:08,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-04-06 20:51:08,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:08,901 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:51:08,902 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 20:51:08,904 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 20:51:08,907 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:08,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 20:51:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 20:51:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-04-06 20:51:08,951 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2022-04-06 20:51:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:08,951 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-04-06 20:51:08,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-06 20:51:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:51:08,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:08,953 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 20:51:08,953 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:51:08,954 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:08,955 INFO L85 PathProgramCache]: Analyzing trace with hash 677978447, now seen corresponding path program 1 times [2022-04-06 20:51:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:08,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [276335996] [2022-04-06 20:51:08,960 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:51:08,960 INFO L85 PathProgramCache]: Analyzing trace with hash 677978447, now seen corresponding path program 2 times [2022-04-06 20:51:08,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:08,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815276701] [2022-04-06 20:51:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:08,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,138 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 20:51:09,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815276701] [2022-04-06 20:51:09,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815276701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:09,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:09,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:51:09,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:09,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [276335996] [2022-04-06 20:51:09,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [276335996] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:09,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:09,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:51:09,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791555161] [2022-04-06 20:51:09,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:09,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:51:09,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:51:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:51:09,142 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:09,254 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-04-06 20:51:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:51:09,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-04-06 20:51:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:09,259 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:51:09,259 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 20:51:09,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:51:09,263 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:09,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 20:51:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-04-06 20:51:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-04-06 20:51:09,273 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 21 [2022-04-06 20:51:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:09,274 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-04-06 20:51:09,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-06 20:51:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:51:09,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:09,276 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, 1, 1, 1] [2022-04-06 20:51:09,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:51:09,276 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:09,277 INFO L85 PathProgramCache]: Analyzing trace with hash -673447056, now seen corresponding path program 1 times [2022-04-06 20:51:09,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:09,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1319805273] [2022-04-06 20:51:09,294 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:09,294 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash -673447056, now seen corresponding path program 2 times [2022-04-06 20:51:09,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:09,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924386522] [2022-04-06 20:51:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:09,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924386522] [2022-04-06 20:51:09,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924386522] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:09,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:09,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:51:09,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:09,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1319805273] [2022-04-06 20:51:09,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1319805273] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:09,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:09,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:51:09,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416887094] [2022-04-06 20:51:09,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:09,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:51:09,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:09,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:51:09,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:51:09,374 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:09,458 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-04-06 20:51:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:51:09,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-04-06 20:51:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:09,460 INFO L225 Difference]: With dead ends: 49 [2022-04-06 20:51:09,460 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 20:51:09,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:51:09,462 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:09,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 43 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 20:51:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-04-06 20:51:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-04-06 20:51:09,475 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-04-06 20:51:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:09,475 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-04-06 20:51:09,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-06 20:51:09,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:51:09,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:09,476 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, 1, 1, 1] [2022-04-06 20:51:09,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:51:09,477 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1101560306, now seen corresponding path program 1 times [2022-04-06 20:51:09,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:09,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1422281186] [2022-04-06 20:51:09,482 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:09,482 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:09,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1101560306, now seen corresponding path program 2 times [2022-04-06 20:51:09,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:09,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900253162] [2022-04-06 20:51:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:51:09,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:09,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900253162] [2022-04-06 20:51:09,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900253162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:09,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:09,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:51:09,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:09,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1422281186] [2022-04-06 20:51:09,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1422281186] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:09,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:09,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:51:09,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081388329] [2022-04-06 20:51:09,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:09,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:51:09,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:09,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:51:09,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:51:09,570 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:09,650 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2022-04-06 20:51:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:51:09,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-06 20:51:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:09,653 INFO L225 Difference]: With dead ends: 57 [2022-04-06 20:51:09,653 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:51:09,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:51:09,654 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:09,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 36 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:51:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:51:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 20:51:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:51:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-04-06 20:51:09,664 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-04-06 20:51:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:09,664 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-04-06 20:51:09,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-04-06 20:51:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:51:09,665 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:09,666 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, 1, 1, 1] [2022-04-06 20:51:09,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:51:09,666 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:09,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:09,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1103407348, now seen corresponding path program 1 times [2022-04-06 20:51:09,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:09,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232147378] [2022-04-06 20:51:09,670 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:09,670 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:09,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1103407348, now seen corresponding path program 2 times [2022-04-06 20:51:09,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:09,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615936810] [2022-04-06 20:51:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:09,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:09,769 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 20:51:09,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:09,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615936810] [2022-04-06 20:51:09,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615936810] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:09,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285156729] [2022-04-06 20:51:09,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:09,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:09,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:09,780 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 20:51:09,803 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 20:51:09,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:09,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:09,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:51:09,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:10,009 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 20:51:10,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:10,120 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 20:51:10,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285156729] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:10,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:10,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-04-06 20:51:10,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:10,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232147378] [2022-04-06 20:51:10,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232147378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:10,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:10,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:51:10,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679301852] [2022-04-06 20:51:10,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:10,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:51:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:51:10,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:51:10,125 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:10,249 INFO L93 Difference]: Finished difference Result 79 states and 109 transitions. [2022-04-06 20:51:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:51:10,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-06 20:51:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:10,250 INFO L225 Difference]: With dead ends: 79 [2022-04-06 20:51:10,250 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 20:51:10,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:51:10,251 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:10,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 27 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 20:51:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-04-06 20:51:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 38 states have internal predecessors, (51), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:51:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-04-06 20:51:10,260 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 24 [2022-04-06 20:51:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:10,261 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-04-06 20:51:10,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-04-06 20:51:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:51:10,262 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:10,262 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:10,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:10,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:10,482 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:10,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1809680179, now seen corresponding path program 3 times [2022-04-06 20:51:10,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:10,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1016311815] [2022-04-06 20:51:10,485 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:10,485 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:10,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1809680179, now seen corresponding path program 4 times [2022-04-06 20:51:10,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:10,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562829611] [2022-04-06 20:51:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:10,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:10,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:10,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:10,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:10,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562829611] [2022-04-06 20:51:10,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562829611] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:10,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175577938] [2022-04-06 20:51:10,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:10,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:10,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:10,559 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 20:51:10,560 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 20:51:10,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:10,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:10,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:51:10,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:10,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:51:10,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175577938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:10,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:51:10,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-04-06 20:51:10,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:10,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1016311815] [2022-04-06 20:51:10,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1016311815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:10,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:10,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:51:10,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496510843] [2022-04-06 20:51:10,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:10,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:51:10,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:51:10,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:51:10,669 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:10,773 INFO L93 Difference]: Finished difference Result 128 states and 185 transitions. [2022-04-06 20:51:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:51:10,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-04-06 20:51:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:10,779 INFO L225 Difference]: With dead ends: 128 [2022-04-06 20:51:10,779 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 20:51:10,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:51:10,780 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:10,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 86 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:10,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 20:51:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2022-04-06 20:51:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 56 states have internal predecessors, (75), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:51:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2022-04-06 20:51:10,804 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 27 [2022-04-06 20:51:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:10,805 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2022-04-06 20:51:10,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2022-04-06 20:51:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:51:10,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:10,806 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:10,833 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 20:51:11,027 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,SelfDestructingSolverStorable5 [2022-04-06 20:51:11,028 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash 829847155, now seen corresponding path program 1 times [2022-04-06 20:51:11,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:11,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67173678] [2022-04-06 20:51:11,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:11,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:11,030 INFO L85 PathProgramCache]: Analyzing trace with hash 829847155, now seen corresponding path program 2 times [2022-04-06 20:51:11,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:11,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586363910] [2022-04-06 20:51:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:11,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 20:51:11,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:11,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586363910] [2022-04-06 20:51:11,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586363910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:11,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:11,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:51:11,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:11,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67173678] [2022-04-06 20:51:11,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67173678] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:11,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:11,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:51:11,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736549628] [2022-04-06 20:51:11,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:11,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:51:11,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:11,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:51:11,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:51:11,080 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:11,136 INFO L93 Difference]: Finished difference Result 124 states and 169 transitions. [2022-04-06 20:51:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:51:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-04-06 20:51:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:11,139 INFO L225 Difference]: With dead ends: 124 [2022-04-06 20:51:11,139 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:51:11,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:51:11,140 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:11,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 50 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:51:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:51:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2022-04-06 20:51:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:51:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-04-06 20:51:11,153 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 27 [2022-04-06 20:51:11,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:11,153 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-04-06 20:51:11,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-04-06 20:51:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:51:11,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:11,154 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:11,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 20:51:11,154 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1786010684, now seen corresponding path program 1 times [2022-04-06 20:51:11,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:11,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1970026425] [2022-04-06 20:51:11,156 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:11,156 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:11,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1786010684, now seen corresponding path program 2 times [2022-04-06 20:51:11,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:11,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722624130] [2022-04-06 20:51:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:11,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:51:11,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:11,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722624130] [2022-04-06 20:51:11,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722624130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:11,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:11,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:51:11,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:11,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1970026425] [2022-04-06 20:51:11,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1970026425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:11,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:11,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:51:11,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207548470] [2022-04-06 20:51:11,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:11,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:51:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:11,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:51:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:51:11,187 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:11,232 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2022-04-06 20:51:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:51:11,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-04-06 20:51:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:11,234 INFO L225 Difference]: With dead ends: 99 [2022-04-06 20:51:11,234 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:51:11,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:51:11,235 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:11,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 47 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:51:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:51:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-04-06 20:51:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.280701754385965) internal successors, (73), 58 states have internal predecessors, (73), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:51:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-04-06 20:51:11,249 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 28 [2022-04-06 20:51:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:11,249 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-04-06 20:51:11,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-04-06 20:51:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:51:11,250 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:11,250 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:11,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 20:51:11,250 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:11,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1845116028, now seen corresponding path program 1 times [2022-04-06 20:51:11,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:11,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [990829358] [2022-04-06 20:51:11,252 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:11,252 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1845116028, now seen corresponding path program 2 times [2022-04-06 20:51:11,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:11,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975858863] [2022-04-06 20:51:11,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:11,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:11,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:11,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975858863] [2022-04-06 20:51:11,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975858863] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:11,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472577200] [2022-04-06 20:51:11,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:11,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:11,310 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 20:51:11,339 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 20:51:11,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:11,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:51:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:11,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:11,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472577200] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:11,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:11,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-04-06 20:51:11,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [990829358] [2022-04-06 20:51:11,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [990829358] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:11,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:11,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:51:11,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499090489] [2022-04-06 20:51:11,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:11,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:51:11,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:51:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:51:11,542 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:11,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:11,658 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2022-04-06 20:51:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:51:11,658 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-04-06 20:51:11,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:11,659 INFO L225 Difference]: With dead ends: 147 [2022-04-06 20:51:11,659 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 20:51:11,659 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:51:11,660 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:11,660 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 29 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 20:51:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2022-04-06 20:51:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:51:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2022-04-06 20:51:11,685 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 28 [2022-04-06 20:51:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:11,685 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2022-04-06 20:51:11,685 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2022-04-06 20:51:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:51:11,687 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:11,687 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:11,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:11,908 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:11,909 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:11,909 INFO L85 PathProgramCache]: Analyzing trace with hash 132899643, now seen corresponding path program 3 times [2022-04-06 20:51:11,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:11,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1003349675] [2022-04-06 20:51:11,910 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:11,910 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:11,910 INFO L85 PathProgramCache]: Analyzing trace with hash 132899643, now seen corresponding path program 4 times [2022-04-06 20:51:11,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:11,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880983625] [2022-04-06 20:51:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:11,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:11,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:11,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880983625] [2022-04-06 20:51:11,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880983625] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:11,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559172892] [2022-04-06 20:51:11,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:11,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:11,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:11,975 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 20:51:11,976 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 20:51:12,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:12,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:12,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:51:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:51:12,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:51:12,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559172892] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:12,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:51:12,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-04-06 20:51:12,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:12,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1003349675] [2022-04-06 20:51:12,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1003349675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:12,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:12,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:51:12,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222353619] [2022-04-06 20:51:12,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:12,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:51:12,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:12,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:51:12,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:51:12,108 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:12,153 INFO L93 Difference]: Finished difference Result 139 states and 175 transitions. [2022-04-06 20:51:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:51:12,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-04-06 20:51:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:12,154 INFO L225 Difference]: With dead ends: 139 [2022-04-06 20:51:12,154 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 20:51:12,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:51:12,156 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:12,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 71 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:51:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 20:51:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-04-06 20:51:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.253968253968254) internal successors, (79), 64 states have internal predecessors, (79), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:51:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-04-06 20:51:12,168 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 31 [2022-04-06 20:51:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:12,168 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-04-06 20:51:12,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-04-06 20:51:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:51:12,169 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:12,169 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:12,196 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 20:51:12,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:12,383 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1455448259, now seen corresponding path program 1 times [2022-04-06 20:51:12,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:12,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [171098732] [2022-04-06 20:51:12,386 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:12,386 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:12,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1455448259, now seen corresponding path program 2 times [2022-04-06 20:51:12,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:12,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145306628] [2022-04-06 20:51:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:12,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:12,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:12,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:12,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145306628] [2022-04-06 20:51:12,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145306628] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96874114] [2022-04-06 20:51:12,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:12,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:12,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:12,450 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 20:51:12,479 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 20:51:12,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:12,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:12,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:51:12,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:12,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:12,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96874114] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:12,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:12,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-04-06 20:51:12,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:12,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [171098732] [2022-04-06 20:51:12,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [171098732] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:12,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:12,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:51:12,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782476659] [2022-04-06 20:51:12,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:12,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:51:12,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:12,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:51:12,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:51:12,727 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:12,869 INFO L93 Difference]: Finished difference Result 159 states and 201 transitions. [2022-04-06 20:51:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:51:12,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-04-06 20:51:12,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:12,870 INFO L225 Difference]: With dead ends: 159 [2022-04-06 20:51:12,870 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 20:51:12,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:51:12,871 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:12,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 29 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 20:51:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2022-04-06 20:51:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 75 states have (on average 1.24) internal successors, (93), 76 states have internal predecessors, (93), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:51:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-04-06 20:51:12,885 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 31 [2022-04-06 20:51:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:12,885 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-04-06 20:51:12,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:12,885 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-04-06 20:51:12,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:51:12,886 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:12,886 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:12,914 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 20:51:13,107 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,SelfDestructingSolverStorable10 [2022-04-06 20:51:13,108 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:13,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2003500250, now seen corresponding path program 3 times [2022-04-06 20:51:13,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:13,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1742907052] [2022-04-06 20:51:13,110 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:13,110 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:13,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2003500250, now seen corresponding path program 4 times [2022-04-06 20:51:13,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:13,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816122084] [2022-04-06 20:51:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:13,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:13,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:13,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:13,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:13,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816122084] [2022-04-06 20:51:13,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816122084] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:13,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102745356] [2022-04-06 20:51:13,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:13,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:13,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:13,191 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 20:51:13,194 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 20:51:13,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:13,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:13,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:51:13,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:51:13,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:51:13,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102745356] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:13,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:51:13,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-04-06 20:51:13,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:13,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1742907052] [2022-04-06 20:51:13,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1742907052] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:13,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:13,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:51:13,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738924898] [2022-04-06 20:51:13,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:13,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:51:13,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:13,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:51:13,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:51:13,454 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:13,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:13,541 INFO L93 Difference]: Finished difference Result 127 states and 155 transitions. [2022-04-06 20:51:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:51:13,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-04-06 20:51:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:13,543 INFO L225 Difference]: With dead ends: 127 [2022-04-06 20:51:13,543 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 20:51:13,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:51:13,544 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:13,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 93 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:51:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 20:51:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-04-06 20:51:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 113 states have internal predecessors, (138), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 20:51:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2022-04-06 20:51:13,577 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 34 [2022-04-06 20:51:13,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:13,577 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2022-04-06 20:51:13,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2022-04-06 20:51:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:51:13,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:13,578 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:13,603 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 20:51:13,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:13,796 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:13,796 INFO L85 PathProgramCache]: Analyzing trace with hash 213381724, now seen corresponding path program 1 times [2022-04-06 20:51:13,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:13,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [548726215] [2022-04-06 20:51:13,798 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:13,798 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 213381724, now seen corresponding path program 2 times [2022-04-06 20:51:13,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:13,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636573611] [2022-04-06 20:51:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:13,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:13,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:13,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:13,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636573611] [2022-04-06 20:51:13,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636573611] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:13,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768584250] [2022-04-06 20:51:13,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:13,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:13,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:13,877 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 20:51:13,878 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 20:51:13,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:13,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:51:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:14,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:14,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768584250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:14,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:14,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-04-06 20:51:14,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:14,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [548726215] [2022-04-06 20:51:14,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [548726215] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:14,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:14,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:51:14,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149163237] [2022-04-06 20:51:14,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:14,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:51:14,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:14,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:51:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:51:14,227 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:14,393 INFO L93 Difference]: Finished difference Result 249 states and 314 transitions. [2022-04-06 20:51:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:51:14,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-04-06 20:51:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:14,396 INFO L225 Difference]: With dead ends: 249 [2022-04-06 20:51:14,396 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 20:51:14,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:51:14,397 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:14,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 28 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 20:51:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 141. [2022-04-06 20:51:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 129 states have (on average 1.2325581395348837) internal successors, (159), 131 states have internal predecessors, (159), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 20:51:14,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2022-04-06 20:51:14,420 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 34 [2022-04-06 20:51:14,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:14,420 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2022-04-06 20:51:14,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:14,421 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2022-04-06 20:51:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:51:14,421 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:14,421 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:14,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 20:51:14,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:14,644 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash 75399261, now seen corresponding path program 3 times [2022-04-06 20:51:14,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:14,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1714668465] [2022-04-06 20:51:14,646 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:14,646 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:14,646 INFO L85 PathProgramCache]: Analyzing trace with hash 75399261, now seen corresponding path program 4 times [2022-04-06 20:51:14,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:14,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941025772] [2022-04-06 20:51:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:14,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:14,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:14,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941025772] [2022-04-06 20:51:14,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941025772] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:14,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104735961] [2022-04-06 20:51:14,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:14,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:14,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:14,731 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 20:51:14,732 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 20:51:14,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:14,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:51:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:51:15,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:51:15,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104735961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:15,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:51:15,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-04-06 20:51:15,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:15,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1714668465] [2022-04-06 20:51:15,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1714668465] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:15,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:15,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:51:15,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411647912] [2022-04-06 20:51:15,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:15,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:51:15,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:15,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:51:15,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:51:15,028 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:15,112 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2022-04-06 20:51:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:51:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-04-06 20:51:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:15,113 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:51:15,113 INFO L226 Difference]: Without dead ends: 150 [2022-04-06 20:51:15,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:51:15,114 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:15,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 158 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-04-06 20:51:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-04-06 20:51:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 135 states have (on average 1.2222222222222223) internal successors, (165), 138 states have internal predecessors, (165), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 20:51:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 180 transitions. [2022-04-06 20:51:15,134 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 180 transitions. Word has length 37 [2022-04-06 20:51:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:15,134 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 180 transitions. [2022-04-06 20:51:15,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 20:51:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 180 transitions. [2022-04-06 20:51:15,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:51:15,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:15,135 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:15,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:15,339 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,SelfDestructingSolverStorable13 [2022-04-06 20:51:15,340 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:15,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:15,340 INFO L85 PathProgramCache]: Analyzing trace with hash -91988131, now seen corresponding path program 1 times [2022-04-06 20:51:15,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:15,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730747489] [2022-04-06 20:51:15,341 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:15,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:15,341 INFO L85 PathProgramCache]: Analyzing trace with hash -91988131, now seen corresponding path program 2 times [2022-04-06 20:51:15,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:15,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756354652] [2022-04-06 20:51:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:15,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 20:51:15,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:15,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756354652] [2022-04-06 20:51:15,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756354652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:15,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:15,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:51:15,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730747489] [2022-04-06 20:51:15,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730747489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:15,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:15,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:51:15,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437201486] [2022-04-06 20:51:15,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:15,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:51:15,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:15,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:51:15,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:51:15,390 INFO L87 Difference]: Start difference. First operand 149 states and 180 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:15,486 INFO L93 Difference]: Finished difference Result 233 states and 285 transitions. [2022-04-06 20:51:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:51:15,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-04-06 20:51:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:15,488 INFO L225 Difference]: With dead ends: 233 [2022-04-06 20:51:15,488 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 20:51:15,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:51:15,490 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:15,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 42 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 20:51:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-04-06 20:51:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 173 states have (on average 1.2196531791907514) internal successors, (211), 176 states have internal predecessors, (211), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2022-04-06 20:51:15,515 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 37 [2022-04-06 20:51:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:15,516 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2022-04-06 20:51:15,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2022-04-06 20:51:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:51:15,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:15,517 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:15,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-06 20:51:15,517 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash 694240631, now seen corresponding path program 1 times [2022-04-06 20:51:15,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:15,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [794297341] [2022-04-06 20:51:15,524 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:15,524 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:15,525 INFO L85 PathProgramCache]: Analyzing trace with hash 694240631, now seen corresponding path program 2 times [2022-04-06 20:51:15,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:15,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751058905] [2022-04-06 20:51:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:15,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 20:51:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 89 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:51:15,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751058905] [2022-04-06 20:51:15,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751058905] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82194515] [2022-04-06 20:51:15,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:15,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:15,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:15,623 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 20:51:15,625 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 20:51:15,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:15,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:51:15,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 87 proven. 35 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:51:15,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 89 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:51:16,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82194515] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:16,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:16,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-04-06 20:51:16,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:16,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [794297341] [2022-04-06 20:51:16,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [794297341] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:16,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:16,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:51:16,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194018577] [2022-04-06 20:51:16,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:16,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:51:16,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:16,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:51:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:51:16,049 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:16,223 INFO L93 Difference]: Finished difference Result 386 states and 479 transitions. [2022-04-06 20:51:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:51:16,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2022-04-06 20:51:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:16,226 INFO L225 Difference]: With dead ends: 386 [2022-04-06 20:51:16,226 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 20:51:16,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=506, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:51:16,231 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:16,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 27 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 20:51:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2022-04-06 20:51:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 197 states have (on average 1.2131979695431472) internal successors, (239), 200 states have internal predecessors, (239), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 256 transitions. [2022-04-06 20:51:16,266 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 256 transitions. Word has length 63 [2022-04-06 20:51:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:16,267 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 256 transitions. [2022-04-06 20:51:16,267 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:16,267 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 256 transitions. [2022-04-06 20:51:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:51:16,268 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:16,268 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:16,287 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 20:51:16,482 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,SelfDestructingSolverStorable15 [2022-04-06 20:51:16,483 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:16,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:16,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1869547939, now seen corresponding path program 3 times [2022-04-06 20:51:16,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:16,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1464160953] [2022-04-06 20:51:16,488 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:16,488 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:16,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1869547939, now seen corresponding path program 4 times [2022-04-06 20:51:16,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:16,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598706667] [2022-04-06 20:51:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:16,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:16,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:16,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:16,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 20:51:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 124 proven. 51 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:51:16,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:16,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598706667] [2022-04-06 20:51:16,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598706667] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:16,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723585405] [2022-04-06 20:51:16,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:16,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:16,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:16,615 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 20:51:16,624 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 20:51:16,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:16,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:16,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:51:16,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 35 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:17,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 37 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:18,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723585405] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:18,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:18,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 23, 20] total 48 [2022-04-06 20:51:18,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:18,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1464160953] [2022-04-06 20:51:18,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1464160953] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:18,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:18,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:51:18,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605961162] [2022-04-06 20:51:18,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:18,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:51:18,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:18,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:51:18,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:51:18,336 INFO L87 Difference]: Start difference. First operand 212 states and 256 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:18,568 INFO L93 Difference]: Finished difference Result 428 states and 528 transitions. [2022-04-06 20:51:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:51:18,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2022-04-06 20:51:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:18,572 INFO L225 Difference]: With dead ends: 428 [2022-04-06 20:51:18,572 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 20:51:18,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:51:18,574 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:18,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 31 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 20:51:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 236. [2022-04-06 20:51:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 221 states have (on average 1.2081447963800904) internal successors, (267), 224 states have internal predecessors, (267), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 284 transitions. [2022-04-06 20:51:18,607 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 284 transitions. Word has length 69 [2022-04-06 20:51:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:18,607 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 284 transitions. [2022-04-06 20:51:18,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:18,607 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 284 transitions. [2022-04-06 20:51:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 20:51:18,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:18,608 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:18,629 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 20:51:18,822 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,SelfDestructingSolverStorable16 [2022-04-06 20:51:18,823 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1429436489, now seen corresponding path program 5 times [2022-04-06 20:51:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:18,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [94996661] [2022-04-06 20:51:18,829 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:18,829 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1429436489, now seen corresponding path program 6 times [2022-04-06 20:51:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:18,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966721077] [2022-04-06 20:51:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:18,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:18,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:18,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 20:51:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 165 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 20:51:18,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:18,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966721077] [2022-04-06 20:51:18,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966721077] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:18,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828319213] [2022-04-06 20:51:18,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:18,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:18,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:18,943 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 20:51:18,972 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 20:51:18,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:51:18,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:18,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:51:18,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 21 proven. 168 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:51:19,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 7 proven. 41 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-04-06 20:51:19,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828319213] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:19,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:19,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 24 [2022-04-06 20:51:19,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:19,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [94996661] [2022-04-06 20:51:19,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [94996661] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:19,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:19,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:51:19,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406468707] [2022-04-06 20:51:19,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:19,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:51:19,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:51:19,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:51:19,627 INFO L87 Difference]: Start difference. First operand 236 states and 284 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:19,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:19,829 INFO L93 Difference]: Finished difference Result 470 states and 577 transitions. [2022-04-06 20:51:19,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:51:19,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2022-04-06 20:51:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:19,830 INFO L225 Difference]: With dead ends: 470 [2022-04-06 20:51:19,830 INFO L226 Difference]: Without dead ends: 288 [2022-04-06 20:51:19,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:51:19,831 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:19,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 33 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-04-06 20:51:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 260. [2022-04-06 20:51:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 245 states have (on average 1.2040816326530612) internal successors, (295), 248 states have internal predecessors, (295), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 312 transitions. [2022-04-06 20:51:19,871 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 312 transitions. Word has length 75 [2022-04-06 20:51:19,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:19,871 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 312 transitions. [2022-04-06 20:51:19,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 312 transitions. [2022-04-06 20:51:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 20:51:19,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:19,872 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:19,889 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 20:51:20,075 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,SelfDestructingSolverStorable17 [2022-04-06 20:51:20,075 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1802186013, now seen corresponding path program 7 times [2022-04-06 20:51:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:20,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [961499513] [2022-04-06 20:51:20,080 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:20,080 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1802186013, now seen corresponding path program 8 times [2022-04-06 20:51:20,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:20,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772945762] [2022-04-06 20:51:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:20,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:20,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 20:51:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:51:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:20,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772945762] [2022-04-06 20:51:20,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772945762] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:20,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781039192] [2022-04-06 20:51:20,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:20,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:20,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:20,184 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 20:51:20,185 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 20:51:20,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:20,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:51:20,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-04-06 20:51:20,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:51:20,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781039192] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:20,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:20,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-04-06 20:51:20,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:20,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [961499513] [2022-04-06 20:51:20,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [961499513] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:20,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:20,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:51:20,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652624754] [2022-04-06 20:51:20,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:20,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:51:20,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:20,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:51:20,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=587, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:51:20,718 INFO L87 Difference]: Start difference. First operand 260 states and 312 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:20,975 INFO L93 Difference]: Finished difference Result 512 states and 626 transitions. [2022-04-06 20:51:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:51:20,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 81 [2022-04-06 20:51:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:20,979 INFO L225 Difference]: With dead ends: 512 [2022-04-06 20:51:20,979 INFO L226 Difference]: Without dead ends: 312 [2022-04-06 20:51:20,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:51:20,980 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:20,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 29 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-04-06 20:51:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2022-04-06 20:51:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 269 states have (on average 1.2007434944237918) internal successors, (323), 272 states have internal predecessors, (323), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 340 transitions. [2022-04-06 20:51:21,022 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 340 transitions. Word has length 81 [2022-04-06 20:51:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:21,022 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 340 transitions. [2022-04-06 20:51:21,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 340 transitions. [2022-04-06 20:51:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 20:51:21,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:21,023 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:21,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:21,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:21,228 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:21,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1644049929, now seen corresponding path program 9 times [2022-04-06 20:51:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:21,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068337063] [2022-04-06 20:51:21,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:21,233 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1644049929, now seen corresponding path program 10 times [2022-04-06 20:51:21,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:21,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612752412] [2022-04-06 20:51:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:21,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:21,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:21,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:21,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 20:51:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 265 proven. 117 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-04-06 20:51:21,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:21,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612752412] [2022-04-06 20:51:21,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612752412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:21,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464866744] [2022-04-06 20:51:21,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:21,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:21,383 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 20:51:21,384 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 20:51:21,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:21,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:21,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:51:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 92 proven. 412 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:22,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 94 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:23,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464866744] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:23,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:23,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 29, 26] total 63 [2022-04-06 20:51:23,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:23,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068337063] [2022-04-06 20:51:23,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068337063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:23,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:23,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:51:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445941787] [2022-04-06 20:51:23,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:23,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:51:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:51:23,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=3272, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:51:23,482 INFO L87 Difference]: Start difference. First operand 284 states and 340 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:23,746 INFO L93 Difference]: Finished difference Result 554 states and 675 transitions. [2022-04-06 20:51:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:51:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 87 [2022-04-06 20:51:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:23,748 INFO L225 Difference]: With dead ends: 554 [2022-04-06 20:51:23,748 INFO L226 Difference]: Without dead ends: 336 [2022-04-06 20:51:23,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=865, Invalid=4391, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:51:23,750 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 102 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:23,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 27 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:23,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-04-06 20:51:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 308. [2022-04-06 20:51:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 293 states have (on average 1.1979522184300342) internal successors, (351), 296 states have internal predecessors, (351), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 368 transitions. [2022-04-06 20:51:23,808 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 368 transitions. Word has length 87 [2022-04-06 20:51:23,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:23,808 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 368 transitions. [2022-04-06 20:51:23,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:23,808 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 368 transitions. [2022-04-06 20:51:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 20:51:23,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:23,809 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:23,833 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 20:51:24,023 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,SelfDestructingSolverStorable19 [2022-04-06 20:51:24,023 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash -218145757, now seen corresponding path program 11 times [2022-04-06 20:51:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:24,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907068705] [2022-04-06 20:51:24,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:24,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:24,029 INFO L85 PathProgramCache]: Analyzing trace with hash -218145757, now seen corresponding path program 12 times [2022-04-06 20:51:24,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:24,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680753324] [2022-04-06 20:51:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:24,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:24,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:24,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:24,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 20:51:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 324 proven. 145 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-04-06 20:51:24,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:24,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680753324] [2022-04-06 20:51:24,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680753324] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:24,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350853380] [2022-04-06 20:51:24,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:24,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:24,163 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 20:51:24,193 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 20:51:24,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:51:24,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:24,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:51:24,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 30 proven. 327 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-04-06 20:51:24,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 7 proven. 59 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2022-04-06 20:51:24,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350853380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:24,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:24,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 27 [2022-04-06 20:51:24,892 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:24,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907068705] [2022-04-06 20:51:24,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907068705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:24,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:24,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:51:24,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515625058] [2022-04-06 20:51:24,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:24,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:51:24,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:24,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:51:24,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:51:24,894 INFO L87 Difference]: Start difference. First operand 308 states and 368 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:25,198 INFO L93 Difference]: Finished difference Result 596 states and 724 transitions. [2022-04-06 20:51:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:51:25,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 93 [2022-04-06 20:51:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:25,201 INFO L225 Difference]: With dead ends: 596 [2022-04-06 20:51:25,201 INFO L226 Difference]: Without dead ends: 360 [2022-04-06 20:51:25,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=1092, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:51:25,204 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:25,205 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 31 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-04-06 20:51:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 332. [2022-04-06 20:51:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 317 states have (on average 1.195583596214511) internal successors, (379), 320 states have internal predecessors, (379), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 396 transitions. [2022-04-06 20:51:25,256 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 396 transitions. Word has length 93 [2022-04-06 20:51:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:25,256 INFO L478 AbstractCegarLoop]: Abstraction has 332 states and 396 transitions. [2022-04-06 20:51:25,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 396 transitions. [2022-04-06 20:51:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 20:51:25,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:25,264 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:25,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:25,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:25,467 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash -369554377, now seen corresponding path program 13 times [2022-04-06 20:51:25,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:25,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267095189] [2022-04-06 20:51:25,474 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:25,474 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash -369554377, now seen corresponding path program 14 times [2022-04-06 20:51:25,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:25,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912506584] [2022-04-06 20:51:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:25,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:25,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:25,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:25,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 20:51:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 389 proven. 176 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 20:51:25,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:25,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912506584] [2022-04-06 20:51:25,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912506584] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:25,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166055476] [2022-04-06 20:51:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:25,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:25,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:25,631 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 20:51:25,633 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 20:51:25,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:25,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:25,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:51:25,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-04-06 20:51:26,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 389 proven. 176 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 20:51:26,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166055476] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:26,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:26,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2022-04-06 20:51:26,383 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:26,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267095189] [2022-04-06 20:51:26,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267095189] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:26,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:26,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:51:26,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867394046] [2022-04-06 20:51:26,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:26,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:51:26,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:51:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=959, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:51:26,385 INFO L87 Difference]: Start difference. First operand 332 states and 396 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:26,723 INFO L93 Difference]: Finished difference Result 638 states and 773 transitions. [2022-04-06 20:51:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:51:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 99 [2022-04-06 20:51:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:26,727 INFO L225 Difference]: With dead ends: 638 [2022-04-06 20:51:26,727 INFO L226 Difference]: Without dead ends: 384 [2022-04-06 20:51:26,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1071, Invalid=1685, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:51:26,729 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 115 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:26,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 31 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-04-06 20:51:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 356. [2022-04-06 20:51:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 341 states have (on average 1.1935483870967742) internal successors, (407), 344 states have internal predecessors, (407), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 424 transitions. [2022-04-06 20:51:26,812 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 424 transitions. Word has length 99 [2022-04-06 20:51:26,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:26,812 INFO L478 AbstractCegarLoop]: Abstraction has 356 states and 424 transitions. [2022-04-06 20:51:26,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 424 transitions. [2022-04-06 20:51:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 20:51:26,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:26,815 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:26,841 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 20:51:27,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:27,036 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1620485475, now seen corresponding path program 15 times [2022-04-06 20:51:27,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:27,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [782408269] [2022-04-06 20:51:27,042 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:27,043 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:27,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1620485475, now seen corresponding path program 16 times [2022-04-06 20:51:27,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:27,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683427824] [2022-04-06 20:51:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:27,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:27,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:27,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:27,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 20:51:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 460 proven. 210 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-04-06 20:51:27,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:27,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683427824] [2022-04-06 20:51:27,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683427824] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:27,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488057451] [2022-04-06 20:51:27,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:27,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:27,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:27,203 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 20:51:27,204 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 20:51:27,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:27,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:27,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:51:27,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 176 proven. 709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:28,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 178 proven. 707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:29,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488057451] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:29,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:29,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 35, 32] total 78 [2022-04-06 20:51:29,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:29,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [782408269] [2022-04-06 20:51:29,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [782408269] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:29,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:29,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:51:29,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038479064] [2022-04-06 20:51:29,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:29,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:51:29,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:29,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:51:29,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=985, Invalid=5021, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:51:29,944 INFO L87 Difference]: Start difference. First operand 356 states and 424 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:30,323 INFO L93 Difference]: Finished difference Result 680 states and 822 transitions. [2022-04-06 20:51:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:51:30,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 105 [2022-04-06 20:51:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:30,325 INFO L225 Difference]: With dead ends: 680 [2022-04-06 20:51:30,325 INFO L226 Difference]: Without dead ends: 408 [2022-04-06 20:51:30,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3288 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1363, Invalid=6827, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:51:30,328 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 129 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:30,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 27 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-04-06 20:51:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 380. [2022-04-06 20:51:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 365 states have (on average 1.1917808219178083) internal successors, (435), 368 states have internal predecessors, (435), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 452 transitions. [2022-04-06 20:51:30,420 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 452 transitions. Word has length 105 [2022-04-06 20:51:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:30,420 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 452 transitions. [2022-04-06 20:51:30,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 452 transitions. [2022-04-06 20:51:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 20:51:30,421 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:30,421 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:30,448 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 20:51:30,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 20:51:30,647 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1739214455, now seen corresponding path program 17 times [2022-04-06 20:51:30,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:30,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1608220170] [2022-04-06 20:51:30,654 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:30,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:30,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1739214455, now seen corresponding path program 18 times [2022-04-06 20:51:30,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:30,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749016396] [2022-04-06 20:51:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:30,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:30,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:30,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:30,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 20:51:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 537 proven. 247 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-04-06 20:51:30,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:30,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749016396] [2022-04-06 20:51:30,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749016396] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:30,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520510055] [2022-04-06 20:51:30,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:30,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:30,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:30,822 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 20:51:30,826 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 20:51:30,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:51:30,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:30,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:51:30,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 39 proven. 540 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2022-04-06 20:51:31,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 7 proven. 77 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2022-04-06 20:51:31,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520510055] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:31,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:31,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 8] total 30 [2022-04-06 20:51:31,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:31,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1608220170] [2022-04-06 20:51:31,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1608220170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:31,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:31,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:51:31,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584244866] [2022-04-06 20:51:31,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:31,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:51:31,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:51:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:51:31,685 INFO L87 Difference]: Start difference. First operand 380 states and 452 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:32,000 INFO L93 Difference]: Finished difference Result 722 states and 871 transitions. [2022-04-06 20:51:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:51:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 111 [2022-04-06 20:51:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:32,003 INFO L225 Difference]: With dead ends: 722 [2022-04-06 20:51:32,003 INFO L226 Difference]: Without dead ends: 432 [2022-04-06 20:51:32,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 213 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:51:32,004 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:32,005 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 25 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-04-06 20:51:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 404. [2022-04-06 20:51:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 389 states have (on average 1.1902313624678664) internal successors, (463), 392 states have internal predecessors, (463), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 480 transitions. [2022-04-06 20:51:32,085 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 480 transitions. Word has length 111 [2022-04-06 20:51:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:32,085 INFO L478 AbstractCegarLoop]: Abstraction has 404 states and 480 transitions. [2022-04-06 20:51:32,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 480 transitions. [2022-04-06 20:51:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 20:51:32,087 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:32,087 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:32,109 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 20:51:32,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:32,308 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1321029981, now seen corresponding path program 19 times [2022-04-06 20:51:32,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:32,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1904285828] [2022-04-06 20:51:32,317 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:32,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1321029981, now seen corresponding path program 20 times [2022-04-06 20:51:32,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:32,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922035570] [2022-04-06 20:51:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:32,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:32,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:32,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:32,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 20:51:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 620 proven. 287 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-04-06 20:51:32,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:32,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922035570] [2022-04-06 20:51:32,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922035570] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:32,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812189288] [2022-04-06 20:51:32,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:32,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:32,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:32,524 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 20:51:32,526 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 20:51:32,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:32,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:32,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:51:32,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 618 proven. 287 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-04-06 20:51:32,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 620 proven. 287 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-04-06 20:51:33,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812189288] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:33,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:33,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 50 [2022-04-06 20:51:33,394 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:33,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1904285828] [2022-04-06 20:51:33,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1904285828] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:33,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:33,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:51:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033657884] [2022-04-06 20:51:33,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:33,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:51:33,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:51:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=1421, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:51:33,396 INFO L87 Difference]: Start difference. First operand 404 states and 480 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:33,823 INFO L93 Difference]: Finished difference Result 764 states and 920 transitions. [2022-04-06 20:51:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:51:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 117 [2022-04-06 20:51:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:33,825 INFO L225 Difference]: With dead ends: 764 [2022-04-06 20:51:33,825 INFO L226 Difference]: Without dead ends: 456 [2022-04-06 20:51:33,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1629, Invalid=2531, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:51:33,827 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 139 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:33,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 29 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-04-06 20:51:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 428. [2022-04-06 20:51:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 413 states have (on average 1.188861985472155) internal successors, (491), 416 states have internal predecessors, (491), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 508 transitions. [2022-04-06 20:51:33,921 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 508 transitions. Word has length 117 [2022-04-06 20:51:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:33,922 INFO L478 AbstractCegarLoop]: Abstraction has 428 states and 508 transitions. [2022-04-06 20:51:33,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 508 transitions. [2022-04-06 20:51:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 20:51:33,923 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:33,923 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 28, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:33,950 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 20:51:34,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:34,147 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:34,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1645056183, now seen corresponding path program 21 times [2022-04-06 20:51:34,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:34,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1571771665] [2022-04-06 20:51:34,156 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:34,156 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:34,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1645056183, now seen corresponding path program 22 times [2022-04-06 20:51:34,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:34,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116224822] [2022-04-06 20:51:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:34,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:34,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:34,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:34,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 20:51:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 709 proven. 330 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-04-06 20:51:34,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:34,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116224822] [2022-04-06 20:51:34,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116224822] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:34,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183349628] [2022-04-06 20:51:34,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:34,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:34,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:34,363 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 20:51:34,375 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 20:51:34,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:34,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:51:34,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 287 proven. 1087 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:35,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 289 proven. 1085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:37,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183349628] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:37,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:37,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 41, 38] total 93 [2022-04-06 20:51:37,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:37,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1571771665] [2022-04-06 20:51:37,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1571771665] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:37,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:37,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:51:37,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397916465] [2022-04-06 20:51:37,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:37,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:51:37,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:37,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:51:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1417, Invalid=7139, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:51:37,746 INFO L87 Difference]: Start difference. First operand 428 states and 508 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:38,228 INFO L93 Difference]: Finished difference Result 806 states and 969 transitions. [2022-04-06 20:51:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:51:38,230 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 123 [2022-04-06 20:51:38,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:38,232 INFO L225 Difference]: With dead ends: 806 [2022-04-06 20:51:38,232 INFO L226 Difference]: Without dead ends: 480 [2022-04-06 20:51:38,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4764 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1978, Invalid=9794, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:51:38,234 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 158 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:38,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 27 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-04-06 20:51:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 452. [2022-04-06 20:51:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 437 states have (on average 1.1876430205949657) internal successors, (519), 440 states have internal predecessors, (519), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 536 transitions. [2022-04-06 20:51:38,337 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 536 transitions. Word has length 123 [2022-04-06 20:51:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:38,337 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 536 transitions. [2022-04-06 20:51:38,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 536 transitions. [2022-04-06 20:51:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 20:51:38,339 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:38,339 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 30, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:38,365 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 20:51:38,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:38,562 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:38,562 INFO L85 PathProgramCache]: Analyzing trace with hash 921401315, now seen corresponding path program 23 times [2022-04-06 20:51:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:38,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1037162634] [2022-04-06 20:51:38,570 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:38,570 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:38,570 INFO L85 PathProgramCache]: Analyzing trace with hash 921401315, now seen corresponding path program 24 times [2022-04-06 20:51:38,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:38,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995384515] [2022-04-06 20:51:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:38,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:38,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:38,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:38,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 20:51:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 804 proven. 376 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2022-04-06 20:51:38,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:38,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995384515] [2022-04-06 20:51:38,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995384515] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:38,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588144312] [2022-04-06 20:51:38,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:38,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:38,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:38,807 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 20:51:38,809 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 20:51:38,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:51:38,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:51:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 48 proven. 807 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2022-04-06 20:51:39,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 7 proven. 95 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2022-04-06 20:51:39,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588144312] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:39,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:39,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 8] total 33 [2022-04-06 20:51:39,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:39,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1037162634] [2022-04-06 20:51:39,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1037162634] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:39,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:39,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:51:39,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159028356] [2022-04-06 20:51:39,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:39,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:51:39,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:39,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:51:39,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:51:39,708 INFO L87 Difference]: Start difference. First operand 452 states and 536 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:40,109 INFO L93 Difference]: Finished difference Result 848 states and 1018 transitions. [2022-04-06 20:51:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:51:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 129 [2022-04-06 20:51:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:40,111 INFO L225 Difference]: With dead ends: 848 [2022-04-06 20:51:40,111 INFO L226 Difference]: Without dead ends: 504 [2022-04-06 20:51:40,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 249 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=611, Invalid=1839, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:51:40,112 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:40,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 29 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-04-06 20:51:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 476. [2022-04-06 20:51:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 461 states have (on average 1.1865509761388287) internal successors, (547), 464 states have internal predecessors, (547), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 564 transitions. [2022-04-06 20:51:40,206 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 564 transitions. Word has length 129 [2022-04-06 20:51:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:40,206 INFO L478 AbstractCegarLoop]: Abstraction has 476 states and 564 transitions. [2022-04-06 20:51:40,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 564 transitions. [2022-04-06 20:51:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 20:51:40,207 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:40,208 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 32, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:40,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:40,422 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,SelfDestructingSolverStorable26 [2022-04-06 20:51:40,422 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash 370856695, now seen corresponding path program 25 times [2022-04-06 20:51:40,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:40,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1985291455] [2022-04-06 20:51:40,431 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:40,431 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:40,431 INFO L85 PathProgramCache]: Analyzing trace with hash 370856695, now seen corresponding path program 26 times [2022-04-06 20:51:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:40,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250382738] [2022-04-06 20:51:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:40,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:40,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:40,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:40,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 20:51:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 905 proven. 425 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2022-04-06 20:51:40,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:40,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250382738] [2022-04-06 20:51:40,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250382738] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:40,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669188918] [2022-04-06 20:51:40,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:40,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:40,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:40,641 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 20:51:40,642 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 20:51:40,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:40,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:40,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:51:40,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 903 proven. 425 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-04-06 20:51:41,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 905 proven. 425 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2022-04-06 20:51:41,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669188918] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:41,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:41,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 59 [2022-04-06 20:51:41,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:41,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1985291455] [2022-04-06 20:51:41,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1985291455] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:41,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:41,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:51:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397704193] [2022-04-06 20:51:41,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:41,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:51:41,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:51:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1449, Invalid=1973, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:51:41,746 INFO L87 Difference]: Start difference. First operand 476 states and 564 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:42,327 INFO L93 Difference]: Finished difference Result 890 states and 1067 transitions. [2022-04-06 20:51:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:51:42,327 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 135 [2022-04-06 20:51:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:42,329 INFO L225 Difference]: With dead ends: 890 [2022-04-06 20:51:42,329 INFO L226 Difference]: Without dead ends: 528 [2022-04-06 20:51:42,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2304, Invalid=3548, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:51:42,330 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:42,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 35 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:51:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-04-06 20:51:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 500. [2022-04-06 20:51:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 485 states have (on average 1.1855670103092784) internal successors, (575), 488 states have internal predecessors, (575), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 592 transitions. [2022-04-06 20:51:42,421 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 592 transitions. Word has length 135 [2022-04-06 20:51:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:42,421 INFO L478 AbstractCegarLoop]: Abstraction has 500 states and 592 transitions. [2022-04-06 20:51:42,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:42,421 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 592 transitions. [2022-04-06 20:51:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 20:51:42,423 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:42,423 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 34, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:42,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 20:51:42,626 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,SelfDestructingSolverStorable27 [2022-04-06 20:51:42,627 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:42,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:42,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1098449187, now seen corresponding path program 27 times [2022-04-06 20:51:42,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:42,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [657566721] [2022-04-06 20:51:42,634 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:42,634 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:42,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1098449187, now seen corresponding path program 28 times [2022-04-06 20:51:42,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:42,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255326731] [2022-04-06 20:51:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:42,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:42,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:42,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:42,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 20:51:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1971 backedges. 1012 proven. 477 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2022-04-06 20:51:42,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:42,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255326731] [2022-04-06 20:51:42,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255326731] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:42,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459174001] [2022-04-06 20:51:42,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:42,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:42,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:42,883 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 20:51:42,912 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 20:51:42,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:42,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:42,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:51:42,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1971 backedges. 425 proven. 1546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:44,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1971 backedges. 427 proven. 1544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:47,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459174001] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:47,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:47,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 47, 44] total 108 [2022-04-06 20:51:47,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:47,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [657566721] [2022-04-06 20:51:47,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [657566721] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:47,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:47,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:51:47,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206911923] [2022-04-06 20:51:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:47,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:51:47,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:51:47,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1930, Invalid=9626, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:51:47,244 INFO L87 Difference]: Start difference. First operand 500 states and 592 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:47,837 INFO L93 Difference]: Finished difference Result 932 states and 1116 transitions. [2022-04-06 20:51:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:51:47,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 141 [2022-04-06 20:51:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:47,841 INFO L225 Difference]: With dead ends: 932 [2022-04-06 20:51:47,841 INFO L226 Difference]: Without dead ends: 552 [2022-04-06 20:51:47,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6510 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2710, Invalid=13292, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:51:47,843 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:47,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 31 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-04-06 20:51:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 524. [2022-04-06 20:51:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 509 states have (on average 1.1846758349705304) internal successors, (603), 512 states have internal predecessors, (603), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 620 transitions. [2022-04-06 20:51:47,948 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 620 transitions. Word has length 141 [2022-04-06 20:51:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:47,948 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 620 transitions. [2022-04-06 20:51:47,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 620 transitions. [2022-04-06 20:51:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 20:51:47,950 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:47,950 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 36, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:47,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 20:51:48,161 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,SelfDestructingSolverStorable28 [2022-04-06 20:51:48,161 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:48,162 INFO L85 PathProgramCache]: Analyzing trace with hash 852104503, now seen corresponding path program 29 times [2022-04-06 20:51:48,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:48,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1774772553] [2022-04-06 20:51:48,171 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:48,171 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:48,171 INFO L85 PathProgramCache]: Analyzing trace with hash 852104503, now seen corresponding path program 30 times [2022-04-06 20:51:48,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:48,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062053254] [2022-04-06 20:51:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:48,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:48,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:48,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:48,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 20:51:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 1125 proven. 532 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-04-06 20:51:48,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:48,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062053254] [2022-04-06 20:51:48,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062053254] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:48,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203366106] [2022-04-06 20:51:48,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:48,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:48,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:48,459 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 20:51:48,490 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 20:51:48,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:51:48,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:48,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:51:48,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 57 proven. 1128 refuted. 0 times theorem prover too weak. 1009 trivial. 0 not checked. [2022-04-06 20:51:49,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 7 proven. 113 refuted. 0 times theorem prover too weak. 2074 trivial. 0 not checked. [2022-04-06 20:51:49,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203366106] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:49,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:49,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10, 8] total 36 [2022-04-06 20:51:49,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:49,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1774772553] [2022-04-06 20:51:49,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1774772553] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:49,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:49,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:51:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771922027] [2022-04-06 20:51:49,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:49,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:51:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:51:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=939, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:51:49,508 INFO L87 Difference]: Start difference. First operand 524 states and 620 transitions. Second operand has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 23 states have internal predecessors, (82), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:49,995 INFO L93 Difference]: Finished difference Result 974 states and 1165 transitions. [2022-04-06 20:51:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:51:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 23 states have internal predecessors, (82), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 147 [2022-04-06 20:51:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:49,999 INFO L225 Difference]: With dead ends: 974 [2022-04-06 20:51:49,999 INFO L226 Difference]: Without dead ends: 576 [2022-04-06 20:51:50,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 285 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=800, Invalid=2280, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:51:50,001 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 197 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:50,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 29 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-04-06 20:51:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 548. [2022-04-06 20:51:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 533 states have (on average 1.1838649155722327) internal successors, (631), 536 states have internal predecessors, (631), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 648 transitions. [2022-04-06 20:51:50,152 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 648 transitions. Word has length 147 [2022-04-06 20:51:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:50,153 INFO L478 AbstractCegarLoop]: Abstraction has 548 states and 648 transitions. [2022-04-06 20:51:50,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 23 states have internal predecessors, (82), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 648 transitions. [2022-04-06 20:51:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 20:51:50,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:50,155 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 38, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:50,177 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 20:51:50,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:50,367 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1630320029, now seen corresponding path program 31 times [2022-04-06 20:51:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [159878215] [2022-04-06 20:51:50,378 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:50,379 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:50,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1630320029, now seen corresponding path program 32 times [2022-04-06 20:51:50,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:50,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825503878] [2022-04-06 20:51:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:50,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:50,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:50,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:50,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 20:51:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2429 backedges. 1244 proven. 590 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-04-06 20:51:50,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:50,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825503878] [2022-04-06 20:51:50,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825503878] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:50,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313317867] [2022-04-06 20:51:50,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:50,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:50,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:50,655 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 20:51:50,671 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 20:51:50,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:50,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:50,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:51:50,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2429 backedges. 1242 proven. 590 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2022-04-06 20:51:51,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2429 backedges. 1244 proven. 590 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-04-06 20:51:51,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313317867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:51,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:51,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 68 [2022-04-06 20:51:51,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:51,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [159878215] [2022-04-06 20:51:51,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [159878215] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:51,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:51,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:51:51,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865459818] [2022-04-06 20:51:51,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:51,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:51:51,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:51:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1941, Invalid=2615, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:51:51,997 INFO L87 Difference]: Start difference. First operand 548 states and 648 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:52,640 INFO L93 Difference]: Finished difference Result 1016 states and 1214 transitions. [2022-04-06 20:51:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:51:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 153 [2022-04-06 20:51:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:52,642 INFO L225 Difference]: With dead ends: 1016 [2022-04-06 20:51:52,642 INFO L226 Difference]: Without dead ends: 600 [2022-04-06 20:51:52,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3096, Invalid=4736, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:51:52,643 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 213 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:52,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 27 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-04-06 20:51:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 572. [2022-04-06 20:51:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 557 states have (on average 1.1831238779174147) internal successors, (659), 560 states have internal predecessors, (659), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 676 transitions. [2022-04-06 20:51:52,778 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 676 transitions. Word has length 153 [2022-04-06 20:51:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:52,778 INFO L478 AbstractCegarLoop]: Abstraction has 572 states and 676 transitions. [2022-04-06 20:51:52,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 676 transitions. [2022-04-06 20:51:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 20:51:52,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:52,781 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 40, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:52,803 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 20:51:53,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:53,004 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:53,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1494439799, now seen corresponding path program 33 times [2022-04-06 20:51:53,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:53,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [402708134] [2022-04-06 20:51:53,015 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:53,015 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1494439799, now seen corresponding path program 34 times [2022-04-06 20:51:53,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:53,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893125082] [2022-04-06 20:51:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:53,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:53,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:53,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:53,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 20:51:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1369 proven. 651 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-04-06 20:51:53,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:53,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893125082] [2022-04-06 20:51:53,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893125082] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:53,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944532340] [2022-04-06 20:51:53,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:53,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:53,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:53,306 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 20:51:53,307 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 20:51:53,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:53,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:53,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:51:53,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 590 proven. 2086 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:55,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 592 proven. 2084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:58,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944532340] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:58,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 53, 50] total 123 [2022-04-06 20:51:58,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [402708134] [2022-04-06 20:51:58,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [402708134] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:58,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:51:58,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370764485] [2022-04-06 20:51:58,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:58,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:51:58,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:51:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2524, Invalid=12482, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 20:51:58,212 INFO L87 Difference]: Start difference. First operand 572 states and 676 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:58,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:58,941 INFO L93 Difference]: Finished difference Result 1058 states and 1263 transitions. [2022-04-06 20:51:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:51:58,941 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 159 [2022-04-06 20:51:58,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:58,943 INFO L225 Difference]: With dead ends: 1058 [2022-04-06 20:51:58,943 INFO L226 Difference]: Without dead ends: 624 [2022-04-06 20:51:58,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8526 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3559, Invalid=17321, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 20:51:58,945 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 193 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:58,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 33 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-04-06 20:51:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 596. [2022-04-06 20:51:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 581 states have (on average 1.1824440619621341) internal successors, (687), 584 states have internal predecessors, (687), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:51:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 704 transitions. [2022-04-06 20:51:59,121 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 704 transitions. Word has length 159 [2022-04-06 20:51:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:59,122 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 704 transitions. [2022-04-06 20:51:59,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 704 transitions. [2022-04-06 20:51:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 20:51:59,123 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:59,123 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 42, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:59,147 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 20:51:59,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 20:51:59,343 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:59,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:59,344 INFO L85 PathProgramCache]: Analyzing trace with hash 451040163, now seen corresponding path program 35 times [2022-04-06 20:51:59,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:59,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1125974091] [2022-04-06 20:51:59,355 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:59,355 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash 451040163, now seen corresponding path program 36 times [2022-04-06 20:51:59,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:59,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852439092] [2022-04-06 20:51:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:59,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:59,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:59,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:51:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:59,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 20:51:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2935 backedges. 1500 proven. 715 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2022-04-06 20:51:59,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:59,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852439092] [2022-04-06 20:51:59,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852439092] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:59,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103915720] [2022-04-06 20:51:59,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:59,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:59,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:59,663 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 20:51:59,664 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 20:51:59,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:51:59,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:51:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2935 backedges. 66 proven. 1503 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2022-04-06 20:52:00,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2935 backedges. 7 proven. 131 refuted. 0 times theorem prover too weak. 2797 trivial. 0 not checked. [2022-04-06 20:52:00,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103915720] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:00,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:00,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10, 8] total 39 [2022-04-06 20:52:00,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:00,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1125974091] [2022-04-06 20:52:00,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1125974091] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:00,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:00,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:52:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116954373] [2022-04-06 20:52:00,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:00,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:52:00,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:00,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:52:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:52:00,759 INFO L87 Difference]: Start difference. First operand 596 states and 704 transitions. Second operand has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 26 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:01,362 INFO L93 Difference]: Finished difference Result 1100 states and 1312 transitions. [2022-04-06 20:52:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:52:01,362 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 26 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 165 [2022-04-06 20:52:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:01,364 INFO L225 Difference]: With dead ends: 1100 [2022-04-06 20:52:01,365 INFO L226 Difference]: Without dead ends: 648 [2022-04-06 20:52:01,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1016, Invalid=2766, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:52:01,366 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 206 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:01,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 29 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-04-06 20:52:01,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 620. [2022-04-06 20:52:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 605 states have (on average 1.1818181818181819) internal successors, (715), 608 states have internal predecessors, (715), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 732 transitions. [2022-04-06 20:52:01,511 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 732 transitions. Word has length 165 [2022-04-06 20:52:01,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:01,512 INFO L478 AbstractCegarLoop]: Abstraction has 620 states and 732 transitions. [2022-04-06 20:52:01,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 26 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:01,512 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 732 transitions. [2022-04-06 20:52:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 20:52:01,513 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:01,513 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 44, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:01,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:01,736 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,SelfDestructingSolverStorable32 [2022-04-06 20:52:01,736 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1678861897, now seen corresponding path program 37 times [2022-04-06 20:52:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:01,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1851770713] [2022-04-06 20:52:01,749 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:01,749 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:01,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1678861897, now seen corresponding path program 38 times [2022-04-06 20:52:01,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:01,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223825383] [2022-04-06 20:52:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:01,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 20:52:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3206 backedges. 1637 proven. 782 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2022-04-06 20:52:02,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:02,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223825383] [2022-04-06 20:52:02,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223825383] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:02,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313592916] [2022-04-06 20:52:02,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:02,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:02,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:02,116 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 20:52:02,118 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 20:52:02,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:02,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:52:02,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3206 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-04-06 20:52:02,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3206 backedges. 1637 proven. 782 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2022-04-06 20:52:03,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313592916] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:03,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:03,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 77 [2022-04-06 20:52:03,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:03,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1851770713] [2022-04-06 20:52:03,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1851770713] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:03,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:03,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:52:03,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070879262] [2022-04-06 20:52:03,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:03,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:52:03,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:52:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2505, Invalid=3347, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:52:03,768 INFO L87 Difference]: Start difference. First operand 620 states and 732 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:04,521 INFO L93 Difference]: Finished difference Result 1142 states and 1361 transitions. [2022-04-06 20:52:04,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:52:04,521 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 171 [2022-04-06 20:52:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:04,523 INFO L225 Difference]: With dead ends: 1142 [2022-04-06 20:52:04,523 INFO L226 Difference]: Without dead ends: 672 [2022-04-06 20:52:04,524 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3018 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4005, Invalid=6095, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:52:04,524 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 222 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:04,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 29 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-04-06 20:52:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 644. [2022-04-06 20:52:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 629 states have (on average 1.1812400635930047) internal successors, (743), 632 states have internal predecessors, (743), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 760 transitions. [2022-04-06 20:52:04,659 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 760 transitions. Word has length 171 [2022-04-06 20:52:04,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:04,659 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 760 transitions. [2022-04-06 20:52:04,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 760 transitions. [2022-04-06 20:52:04,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 20:52:04,661 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:04,661 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 46, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:04,679 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 20:52:04,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:04,868 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:04,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:04,868 INFO L85 PathProgramCache]: Analyzing trace with hash -7463709, now seen corresponding path program 39 times [2022-04-06 20:52:04,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:04,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1904579391] [2022-04-06 20:52:04,878 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:04,878 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash -7463709, now seen corresponding path program 40 times [2022-04-06 20:52:04,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:04,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223797561] [2022-04-06 20:52:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:04,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:05,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:05,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:05,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 20:52:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 1780 proven. 852 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2022-04-06 20:52:05,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:05,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223797561] [2022-04-06 20:52:05,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223797561] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:05,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097592808] [2022-04-06 20:52:05,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:05,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:05,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:05,236 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 20:52:05,237 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 20:52:05,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:05,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:05,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:52:05,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 782 proven. 2707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:07,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 784 proven. 2705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:11,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097592808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:11,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:11,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 59, 56] total 138 [2022-04-06 20:52:11,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:11,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1904579391] [2022-04-06 20:52:11,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1904579391] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:11,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:11,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:52:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261219735] [2022-04-06 20:52:11,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:11,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:52:11,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:11,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:52:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3199, Invalid=15707, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:52:11,121 INFO L87 Difference]: Start difference. First operand 644 states and 760 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:12,024 INFO L93 Difference]: Finished difference Result 1184 states and 1410 transitions. [2022-04-06 20:52:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:52:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 177 [2022-04-06 20:52:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:12,026 INFO L225 Difference]: With dead ends: 1184 [2022-04-06 20:52:12,026 INFO L226 Difference]: Without dead ends: 696 [2022-04-06 20:52:12,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 248 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10812 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4525, Invalid=21881, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 20:52:12,028 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 224 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:12,028 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 29 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-04-06 20:52:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 668. [2022-04-06 20:52:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 653 states have (on average 1.1807044410413476) internal successors, (771), 656 states have internal predecessors, (771), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 788 transitions. [2022-04-06 20:52:12,167 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 788 transitions. Word has length 177 [2022-04-06 20:52:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:12,167 INFO L478 AbstractCegarLoop]: Abstraction has 668 states and 788 transitions. [2022-04-06 20:52:12,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 28 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 788 transitions. [2022-04-06 20:52:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 20:52:12,168 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:12,169 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 48, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:12,189 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 20:52:12,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:12,383 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:12,383 INFO L85 PathProgramCache]: Analyzing trace with hash 5495799, now seen corresponding path program 41 times [2022-04-06 20:52:12,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:12,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [312440698] [2022-04-06 20:52:12,400 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:12,400 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash 5495799, now seen corresponding path program 42 times [2022-04-06 20:52:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95626579] [2022-04-06 20:52:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:12,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:12,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:12,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 20:52:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1929 proven. 925 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-04-06 20:52:12,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:12,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95626579] [2022-04-06 20:52:12,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95626579] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:12,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712487271] [2022-04-06 20:52:12,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:12,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:12,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:12,779 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 20:52:12,786 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 20:52:12,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:52:12,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:12,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:52:12,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 75 proven. 1932 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2022-04-06 20:52:13,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 7 proven. 149 refuted. 0 times theorem prover too weak. 3628 trivial. 0 not checked. [2022-04-06 20:52:14,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712487271] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:14,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:14,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10, 8] total 42 [2022-04-06 20:52:14,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [312440698] [2022-04-06 20:52:14,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [312440698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:14,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:14,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:52:14,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072115697] [2022-04-06 20:52:14,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:14,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:52:14,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:14,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:52:14,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=1242, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:52:14,017 INFO L87 Difference]: Start difference. First operand 668 states and 788 transitions. Second operand has 30 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 29 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:14,706 INFO L93 Difference]: Finished difference Result 1226 states and 1459 transitions. [2022-04-06 20:52:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:52:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 29 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 183 [2022-04-06 20:52:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:14,708 INFO L225 Difference]: With dead ends: 1226 [2022-04-06 20:52:14,708 INFO L226 Difference]: Without dead ends: 720 [2022-04-06 20:52:14,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 357 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1259, Invalid=3297, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:52:14,709 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 231 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:14,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 31 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-04-06 20:52:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 692. [2022-04-06 20:52:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 677 states have (on average 1.1802067946824224) internal successors, (799), 680 states have internal predecessors, (799), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 816 transitions. [2022-04-06 20:52:14,876 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 816 transitions. Word has length 183 [2022-04-06 20:52:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:14,876 INFO L478 AbstractCegarLoop]: Abstraction has 692 states and 816 transitions. [2022-04-06 20:52:14,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3333333333333335) internal successors, (100), 29 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 816 transitions. [2022-04-06 20:52:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 20:52:14,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:14,878 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 50, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:14,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:15,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:15,091 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1799444957, now seen corresponding path program 43 times [2022-04-06 20:52:15,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:15,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1401826662] [2022-04-06 20:52:15,118 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:15,118 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1799444957, now seen corresponding path program 44 times [2022-04-06 20:52:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:15,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872491877] [2022-04-06 20:52:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:15,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:15,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 20:52:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4091 backedges. 2084 proven. 1001 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2022-04-06 20:52:15,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:15,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872491877] [2022-04-06 20:52:15,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872491877] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:15,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093388273] [2022-04-06 20:52:15,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:15,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:15,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:15,559 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 20:52:15,588 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 20:52:15,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:15,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:15,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:52:15,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4091 backedges. 2082 proven. 1001 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2022-04-06 20:52:16,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4091 backedges. 2084 proven. 1001 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2022-04-06 20:52:17,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093388273] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:17,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:17,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 86 [2022-04-06 20:52:17,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:17,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1401826662] [2022-04-06 20:52:17,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1401826662] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:17,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:17,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:52:17,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867140612] [2022-04-06 20:52:17,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:17,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:52:17,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:17,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:52:17,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3141, Invalid=4169, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:52:17,429 INFO L87 Difference]: Start difference. First operand 692 states and 816 transitions. Second operand has 31 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 30 states have internal predecessors, (103), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:18,387 INFO L93 Difference]: Finished difference Result 1268 states and 1508 transitions. [2022-04-06 20:52:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:52:18,387 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 30 states have internal predecessors, (103), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 189 [2022-04-06 20:52:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:18,390 INFO L225 Difference]: With dead ends: 1268 [2022-04-06 20:52:18,390 INFO L226 Difference]: Without dead ends: 744 [2022-04-06 20:52:18,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3801 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5031, Invalid=7625, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:52:18,392 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 269 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:18,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 29 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-04-06 20:52:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 716. [2022-04-06 20:52:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 701 states have (on average 1.1797432239657633) internal successors, (827), 704 states have internal predecessors, (827), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 844 transitions. [2022-04-06 20:52:18,564 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 844 transitions. Word has length 189 [2022-04-06 20:52:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:18,564 INFO L478 AbstractCegarLoop]: Abstraction has 716 states and 844 transitions. [2022-04-06 20:52:18,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 30 states have internal predecessors, (103), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 844 transitions. [2022-04-06 20:52:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 20:52:18,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:18,566 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 52, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:18,584 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 20:52:18,772 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,SelfDestructingSolverStorable36 [2022-04-06 20:52:18,772 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash -46457289, now seen corresponding path program 45 times [2022-04-06 20:52:18,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:18,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2031447505] [2022-04-06 20:52:18,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:18,788 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:18,788 INFO L85 PathProgramCache]: Analyzing trace with hash -46457289, now seen corresponding path program 46 times [2022-04-06 20:52:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:18,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755074952] [2022-04-06 20:52:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:18,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:19,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:19,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:19,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 20:52:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 2245 proven. 1080 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2022-04-06 20:52:19,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:19,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755074952] [2022-04-06 20:52:19,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755074952] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:19,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128675328] [2022-04-06 20:52:19,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:19,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:19,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:19,215 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 20:52:19,215 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 20:52:19,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:19,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:19,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:52:19,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 1001 proven. 3409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:22,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 1003 proven. 3407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:26,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128675328] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:26,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:26,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 65, 62] total 153 [2022-04-06 20:52:26,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2031447505] [2022-04-06 20:52:26,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2031447505] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:26,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:26,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:52:26,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847097836] [2022-04-06 20:52:26,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:26,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:52:26,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:26,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:52:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3955, Invalid=19301, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 20:52:26,185 INFO L87 Difference]: Start difference. First operand 716 states and 844 transitions. Second operand has 32 states, 32 states have (on average 3.3125) internal successors, (106), 31 states have internal predecessors, (106), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:27,212 INFO L93 Difference]: Finished difference Result 1310 states and 1557 transitions. [2022-04-06 20:52:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:52:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.3125) internal successors, (106), 31 states have internal predecessors, (106), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 195 [2022-04-06 20:52:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:27,214 INFO L225 Difference]: With dead ends: 1310 [2022-04-06 20:52:27,214 INFO L226 Difference]: Without dead ends: 768 [2022-04-06 20:52:27,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13368 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5608, Invalid=26972, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 20:52:27,217 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 260 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:27,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 29 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:27,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-04-06 20:52:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 740. [2022-04-06 20:52:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 725 states have (on average 1.1793103448275861) internal successors, (855), 728 states have internal predecessors, (855), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 872 transitions. [2022-04-06 20:52:27,398 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 872 transitions. Word has length 195 [2022-04-06 20:52:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:27,398 INFO L478 AbstractCegarLoop]: Abstraction has 740 states and 872 transitions. [2022-04-06 20:52:27,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.3125) internal successors, (106), 31 states have internal predecessors, (106), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 872 transitions. [2022-04-06 20:52:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-04-06 20:52:27,400 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:27,400 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 54, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:27,418 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 20:52:27,607 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,SelfDestructingSolverStorable37 [2022-04-06 20:52:27,607 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1604587677, now seen corresponding path program 47 times [2022-04-06 20:52:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [492807715] [2022-04-06 20:52:27,638 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:27,638 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:27,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1604587677, now seen corresponding path program 48 times [2022-04-06 20:52:27,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:27,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208524911] [2022-04-06 20:52:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:27,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:28,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:28,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:28,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 20:52:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4741 backedges. 2412 proven. 1162 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2022-04-06 20:52:28,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:28,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208524911] [2022-04-06 20:52:28,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208524911] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:28,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263764738] [2022-04-06 20:52:28,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:28,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:28,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:28,120 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 20:52:28,121 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 20:52:28,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:52:28,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:28,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:52:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4741 backedges. 84 proven. 2415 refuted. 0 times theorem prover too weak. 2242 trivial. 0 not checked. [2022-04-06 20:52:28,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4741 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 4567 trivial. 0 not checked. [2022-04-06 20:52:29,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263764738] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:29,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:29,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 10, 8] total 45 [2022-04-06 20:52:29,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:29,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [492807715] [2022-04-06 20:52:29,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [492807715] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:29,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:29,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:52:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908376873] [2022-04-06 20:52:29,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:29,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:52:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:29,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:52:29,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=1407, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:52:29,450 INFO L87 Difference]: Start difference. First operand 740 states and 872 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 32 states have internal predecessors, (109), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:30,233 INFO L93 Difference]: Finished difference Result 1352 states and 1606 transitions. [2022-04-06 20:52:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:52:30,233 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 32 states have internal predecessors, (109), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 201 [2022-04-06 20:52:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:30,236 INFO L225 Difference]: With dead ends: 1352 [2022-04-06 20:52:30,236 INFO L226 Difference]: Without dead ends: 792 [2022-04-06 20:52:30,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 393 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1529, Invalid=3873, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:52:30,237 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 261 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:30,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 27 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-04-06 20:52:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 764. [2022-04-06 20:52:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 749 states have (on average 1.17890520694259) internal successors, (883), 752 states have internal predecessors, (883), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 900 transitions. [2022-04-06 20:52:30,418 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 900 transitions. Word has length 201 [2022-04-06 20:52:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:30,419 INFO L478 AbstractCegarLoop]: Abstraction has 764 states and 900 transitions. [2022-04-06 20:52:30,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 32 states have internal predecessors, (109), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 900 transitions. [2022-04-06 20:52:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-06 20:52:30,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:30,421 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 56, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:30,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:30,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:52:30,643 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:30,643 INFO L85 PathProgramCache]: Analyzing trace with hash -73637769, now seen corresponding path program 49 times [2022-04-06 20:52:30,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:30,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [331252903] [2022-04-06 20:52:30,676 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:30,676 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -73637769, now seen corresponding path program 50 times [2022-04-06 20:52:30,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:30,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384470462] [2022-04-06 20:52:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:30,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:31,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:31,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:31,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 20:52:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 2585 proven. 1247 refuted. 0 times theorem prover too weak. 1252 trivial. 0 not checked. [2022-04-06 20:52:31,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:31,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384470462] [2022-04-06 20:52:31,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384470462] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:31,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458463935] [2022-04-06 20:52:31,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:31,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:31,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:31,151 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 20:52:31,154 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 20:52:31,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:31,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:31,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:52:31,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 2583 proven. 1247 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2022-04-06 20:52:32,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 2585 proven. 1247 refuted. 0 times theorem prover too weak. 1252 trivial. 0 not checked. [2022-04-06 20:52:33,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458463935] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:33,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 95 [2022-04-06 20:52:33,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:33,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [331252903] [2022-04-06 20:52:33,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [331252903] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:33,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:52:33,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873217415] [2022-04-06 20:52:33,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:33,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:52:33,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:33,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:52:33,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3849, Invalid=5081, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:52:33,332 INFO L87 Difference]: Start difference. First operand 764 states and 900 transitions. Second operand has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 33 states have internal predecessors, (112), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:34,490 INFO L93 Difference]: Finished difference Result 1394 states and 1655 transitions. [2022-04-06 20:52:34,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:52:34,490 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 33 states have internal predecessors, (112), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 207 [2022-04-06 20:52:34,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:34,493 INFO L225 Difference]: With dead ends: 1394 [2022-04-06 20:52:34,493 INFO L226 Difference]: Without dead ends: 816 [2022-04-06 20:52:34,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4674 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6174, Invalid=9326, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:52:34,495 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 263 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:34,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 29 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:52:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-04-06 20:52:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 788. [2022-04-06 20:52:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 773 states have (on average 1.1785252263906856) internal successors, (911), 776 states have internal predecessors, (911), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 928 transitions. [2022-04-06 20:52:34,691 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 928 transitions. Word has length 207 [2022-04-06 20:52:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:34,691 INFO L478 AbstractCegarLoop]: Abstraction has 788 states and 928 transitions. [2022-04-06 20:52:34,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 33 states have internal predecessors, (112), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 928 transitions. [2022-04-06 20:52:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 20:52:34,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:34,693 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 58, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:34,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:34,915 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,SelfDestructingSolverStorable39 [2022-04-06 20:52:34,915 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash -431097693, now seen corresponding path program 51 times [2022-04-06 20:52:34,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:34,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1957544641] [2022-04-06 20:52:34,936 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:34,936 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -431097693, now seen corresponding path program 52 times [2022-04-06 20:52:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:34,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560529397] [2022-04-06 20:52:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:35,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:35,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:35,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-06 20:52:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 2764 proven. 1335 refuted. 0 times theorem prover too weak. 1340 trivial. 0 not checked. [2022-04-06 20:52:35,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:35,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560529397] [2022-04-06 20:52:35,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560529397] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:35,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573402072] [2022-04-06 20:52:35,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:35,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:35,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:35,390 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 20:52:35,390 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 20:52:35,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:35,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:35,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 20:52:35,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 1247 proven. 4192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:38,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 1249 proven. 4190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:43,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573402072] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:43,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:43,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 71, 68] total 168 [2022-04-06 20:52:43,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:43,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1957544641] [2022-04-06 20:52:43,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1957544641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:43,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:43,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:52:43,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682071449] [2022-04-06 20:52:43,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:43,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:52:43,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:43,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:52:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4792, Invalid=23264, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 20:52:43,320 INFO L87 Difference]: Start difference. First operand 788 states and 928 transitions. Second operand has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 34 states have internal predecessors, (115), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:44,529 INFO L93 Difference]: Finished difference Result 1436 states and 1704 transitions. [2022-04-06 20:52:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:52:44,529 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 34 states have internal predecessors, (115), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 213 [2022-04-06 20:52:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:44,531 INFO L225 Difference]: With dead ends: 1436 [2022-04-06 20:52:44,531 INFO L226 Difference]: Without dead ends: 840 [2022-04-06 20:52:44,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 296 SyntacticMatches, 3 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16194 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6808, Invalid=32594, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:52:44,534 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 275 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:44,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 29 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-04-06 20:52:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 812. [2022-04-06 20:52:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 797 states have (on average 1.178168130489335) internal successors, (939), 800 states have internal predecessors, (939), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 956 transitions. [2022-04-06 20:52:44,745 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 956 transitions. Word has length 213 [2022-04-06 20:52:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:44,745 INFO L478 AbstractCegarLoop]: Abstraction has 812 states and 956 transitions. [2022-04-06 20:52:44,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 34 states have internal predecessors, (115), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 956 transitions. [2022-04-06 20:52:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-04-06 20:52:44,747 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:44,747 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 60, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:44,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:44,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:44,963 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash -697326921, now seen corresponding path program 53 times [2022-04-06 20:52:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:44,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [279687574] [2022-04-06 20:52:44,993 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:44,993 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:44,993 INFO L85 PathProgramCache]: Analyzing trace with hash -697326921, now seen corresponding path program 54 times [2022-04-06 20:52:44,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:44,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174726821] [2022-04-06 20:52:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:44,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:45,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:45,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:45,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 20:52:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5806 backedges. 2949 proven. 1426 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2022-04-06 20:52:45,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:45,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174726821] [2022-04-06 20:52:45,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174726821] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:45,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810284232] [2022-04-06 20:52:45,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:45,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:45,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:45,504 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 20:52:45,512 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 20:52:45,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:52:45,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:45,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:52:45,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5806 backedges. 93 proven. 2952 refuted. 0 times theorem prover too weak. 2761 trivial. 0 not checked. [2022-04-06 20:52:46,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5806 backedges. 7 proven. 185 refuted. 0 times theorem prover too weak. 5614 trivial. 0 not checked. [2022-04-06 20:52:46,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810284232] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:46,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:46,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 10, 8] total 48 [2022-04-06 20:52:46,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [279687574] [2022-04-06 20:52:46,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [279687574] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:46,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:46,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:52:46,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566169937] [2022-04-06 20:52:46,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:46,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:52:46,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:46,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:52:46,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1581, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:52:46,989 INFO L87 Difference]: Start difference. First operand 812 states and 956 transitions. Second operand has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 35 states have internal predecessors, (118), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:47,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:47,911 INFO L93 Difference]: Finished difference Result 1478 states and 1753 transitions. [2022-04-06 20:52:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:52:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 35 states have internal predecessors, (118), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 219 [2022-04-06 20:52:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:47,913 INFO L225 Difference]: With dead ends: 1478 [2022-04-06 20:52:47,913 INFO L226 Difference]: Without dead ends: 864 [2022-04-06 20:52:47,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 429 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1826, Invalid=4494, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:52:47,915 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 268 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:47,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 33 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:52:47,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-04-06 20:52:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 836. [2022-04-06 20:52:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 821 states have (on average 1.1778319123020706) internal successors, (967), 824 states have internal predecessors, (967), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 984 transitions. [2022-04-06 20:52:48,227 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 984 transitions. Word has length 219 [2022-04-06 20:52:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:48,228 INFO L478 AbstractCegarLoop]: Abstraction has 836 states and 984 transitions. [2022-04-06 20:52:48,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 35 states have internal predecessors, (118), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 984 transitions. [2022-04-06 20:52:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-04-06 20:52:48,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:48,229 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 62, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:48,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:48,443 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,SelfDestructingSolverStorable41 [2022-04-06 20:52:48,443 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1468218909, now seen corresponding path program 55 times [2022-04-06 20:52:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:48,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082514809] [2022-04-06 20:52:48,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:48,464 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:48,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1468218909, now seen corresponding path program 56 times [2022-04-06 20:52:48,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:48,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443154650] [2022-04-06 20:52:48,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:48,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:48,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:48,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:48,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 20:52:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6185 backedges. 3140 proven. 1520 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2022-04-06 20:52:49,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:49,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443154650] [2022-04-06 20:52:49,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443154650] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:49,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908701924] [2022-04-06 20:52:49,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:49,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:49,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:49,012 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 20:52:49,029 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 20:52:49,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:49,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:52:49,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6185 backedges. 3138 proven. 1520 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2022-04-06 20:52:50,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6185 backedges. 3140 proven. 1520 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2022-04-06 20:52:51,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908701924] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:51,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:51,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 104 [2022-04-06 20:52:51,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:51,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2082514809] [2022-04-06 20:52:51,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2082514809] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:51,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:51,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:52:51,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415720878] [2022-04-06 20:52:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:51,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:52:51,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:52:51,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4629, Invalid=6083, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:52:51,516 INFO L87 Difference]: Start difference. First operand 836 states and 984 transitions. Second operand has 37 states, 37 states have (on average 3.27027027027027) internal successors, (121), 36 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:52,801 INFO L93 Difference]: Finished difference Result 1520 states and 1802 transitions. [2022-04-06 20:52:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:52:52,801 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.27027027027027) internal successors, (121), 36 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 225 [2022-04-06 20:52:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:52,803 INFO L225 Difference]: With dead ends: 1520 [2022-04-06 20:52:52,803 INFO L226 Difference]: Without dead ends: 888 [2022-04-06 20:52:52,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5637 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7434, Invalid=11198, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:52:52,806 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 276 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:52,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 35 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:52:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-04-06 20:52:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 860. [2022-04-06 20:52:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 845 states have (on average 1.1775147928994083) internal successors, (995), 848 states have internal predecessors, (995), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:52:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1012 transitions. [2022-04-06 20:52:53,124 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1012 transitions. Word has length 225 [2022-04-06 20:52:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:53,124 INFO L478 AbstractCegarLoop]: Abstraction has 860 states and 1012 transitions. [2022-04-06 20:52:53,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.27027027027027) internal successors, (121), 36 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1012 transitions. [2022-04-06 20:52:53,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-04-06 20:52:53,126 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:53,126 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 64, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:53,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 20:52:53,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:53,326 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1521280247, now seen corresponding path program 57 times [2022-04-06 20:52:53,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:53,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1538136087] [2022-04-06 20:52:53,351 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:53,351 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:53,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1521280247, now seen corresponding path program 58 times [2022-04-06 20:52:53,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:53,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177914702] [2022-04-06 20:52:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:53,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:53,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:53,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:52:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:53,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-04-06 20:52:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6576 backedges. 3337 proven. 1617 refuted. 0 times theorem prover too weak. 1622 trivial. 0 not checked. [2022-04-06 20:52:53,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:53,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177914702] [2022-04-06 20:52:53,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177914702] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:53,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626081143] [2022-04-06 20:52:53,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:53,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:53,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:53,903 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 20:52:53,904 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 20:52:53,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:53,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:53,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 20:52:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6576 backedges. 1520 proven. 5056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:57,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6576 backedges. 1522 proven. 5054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:03,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626081143] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:03,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:03,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 77, 74] total 183 [2022-04-06 20:53:03,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:03,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1538136087] [2022-04-06 20:53:03,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1538136087] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:03,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:03,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:53:03,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164202276] [2022-04-06 20:53:03,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:03,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:53:03,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:03,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:53:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5710, Invalid=27596, Unknown=0, NotChecked=0, Total=33306 [2022-04-06 20:53:03,136 INFO L87 Difference]: Start difference. First operand 860 states and 1012 transitions. Second operand has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:04,579 INFO L93 Difference]: Finished difference Result 1562 states and 1851 transitions. [2022-04-06 20:53:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:53:04,580 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 231 [2022-04-06 20:53:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:04,582 INFO L225 Difference]: With dead ends: 1562 [2022-04-06 20:53:04,582 INFO L226 Difference]: Without dead ends: 912 [2022-04-06 20:53:04,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19290 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=8125, Invalid=38747, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 20:53:04,585 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 328 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:04,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 33 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-04-06 20:53:04,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 884. [2022-04-06 20:53:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 869 states have (on average 1.1772151898734178) internal successors, (1023), 872 states have internal predecessors, (1023), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:53:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1040 transitions. [2022-04-06 20:53:04,912 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1040 transitions. Word has length 231 [2022-04-06 20:53:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:04,912 INFO L478 AbstractCegarLoop]: Abstraction has 884 states and 1040 transitions. [2022-04-06 20:53:04,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1040 transitions. [2022-04-06 20:53:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-04-06 20:53:04,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:04,913 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 66, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:04,930 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 20:53:05,114 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:05,114 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash 651184931, now seen corresponding path program 59 times [2022-04-06 20:53:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:05,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1581006622] [2022-04-06 20:53:05,130 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:05,131 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash 651184931, now seen corresponding path program 60 times [2022-04-06 20:53:05,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:05,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743592614] [2022-04-06 20:53:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:05,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:05,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:05,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:53:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:05,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 20:53:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6979 backedges. 3540 proven. 1717 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-04-06 20:53:05,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:05,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743592614] [2022-04-06 20:53:05,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743592614] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:05,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268794665] [2022-04-06 20:53:05,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:05,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:05,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:05,754 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 20:53:05,754 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 20:53:05,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:53:05,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:05,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:53:05,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6979 backedges. 102 proven. 3543 refuted. 0 times theorem prover too weak. 3334 trivial. 0 not checked. [2022-04-06 20:53:06,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6979 backedges. 7 proven. 203 refuted. 0 times theorem prover too weak. 6769 trivial. 0 not checked. [2022-04-06 20:53:07,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268794665] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:07,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:07,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 10, 8] total 51 [2022-04-06 20:53:07,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:07,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1581006622] [2022-04-06 20:53:07,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1581006622] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:07,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:07,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:53:07,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572801070] [2022-04-06 20:53:07,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:07,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:53:07,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:07,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:53:07,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1764, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:53:07,247 INFO L87 Difference]: Start difference. First operand 884 states and 1040 transitions. Second operand has 39 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 38 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:08,306 INFO L93 Difference]: Finished difference Result 1604 states and 1900 transitions. [2022-04-06 20:53:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:53:08,306 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 38 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 237 [2022-04-06 20:53:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:08,309 INFO L225 Difference]: With dead ends: 1604 [2022-04-06 20:53:08,309 INFO L226 Difference]: Without dead ends: 936 [2022-04-06 20:53:08,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 465 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2150, Invalid=5160, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:53:08,310 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 322 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:08,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 33 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-04-06 20:53:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 908. [2022-04-06 20:53:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 893 states have (on average 1.1769316909294514) internal successors, (1051), 896 states have internal predecessors, (1051), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:53:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1068 transitions. [2022-04-06 20:53:08,567 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1068 transitions. Word has length 237 [2022-04-06 20:53:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:08,567 INFO L478 AbstractCegarLoop]: Abstraction has 908 states and 1068 transitions. [2022-04-06 20:53:08,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 38 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1068 transitions. [2022-04-06 20:53:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-04-06 20:53:08,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:08,569 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 68, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:08,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:08,791 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,SelfDestructingSolverStorable44 [2022-04-06 20:53:08,792 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash -951310537, now seen corresponding path program 61 times [2022-04-06 20:53:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:08,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [820990999] [2022-04-06 20:53:08,821 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:08,821 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash -951310537, now seen corresponding path program 62 times [2022-04-06 20:53:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:08,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000289026] [2022-04-06 20:53:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:08,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:09,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:09,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:53:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:09,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-04-06 20:53:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7394 backedges. 3749 proven. 1820 refuted. 0 times theorem prover too weak. 1825 trivial. 0 not checked. [2022-04-06 20:53:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:09,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000289026] [2022-04-06 20:53:09,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000289026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:09,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598797224] [2022-04-06 20:53:09,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:09,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:09,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:09,487 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 20:53:09,508 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 20:53:09,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:09,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:53:09,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7394 backedges. 3747 proven. 1820 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2022-04-06 20:53:10,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7394 backedges. 3749 proven. 1820 refuted. 0 times theorem prover too weak. 1825 trivial. 0 not checked. [2022-04-06 20:53:12,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598797224] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:12,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:12,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 113 [2022-04-06 20:53:12,325 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:12,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [820990999] [2022-04-06 20:53:12,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [820990999] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:12,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:12,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:53:12,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395093217] [2022-04-06 20:53:12,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:12,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:53:12,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:53:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5481, Invalid=7175, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:53:12,328 INFO L87 Difference]: Start difference. First operand 908 states and 1068 transitions. Second operand has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:13,807 INFO L93 Difference]: Finished difference Result 1646 states and 1949 transitions. [2022-04-06 20:53:13,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:53:13,807 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 243 [2022-04-06 20:53:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:13,810 INFO L225 Difference]: With dead ends: 1646 [2022-04-06 20:53:13,810 INFO L226 Difference]: Without dead ends: 960 [2022-04-06 20:53:13,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6690 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8811, Invalid=13241, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 20:53:13,814 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 304 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:13,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 31 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:13,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-04-06 20:53:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 932. [2022-04-06 20:53:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 917 states have (on average 1.1766630316248636) internal successors, (1079), 920 states have internal predecessors, (1079), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:53:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1096 transitions. [2022-04-06 20:53:14,073 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1096 transitions. Word has length 243 [2022-04-06 20:53:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:14,074 INFO L478 AbstractCegarLoop]: Abstraction has 932 states and 1096 transitions. [2022-04-06 20:53:14,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1096 transitions. [2022-04-06 20:53:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-04-06 20:53:14,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:14,075 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 70, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:14,091 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 20:53:14,275 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,SelfDestructingSolverStorable45 [2022-04-06 20:53:14,276 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash 523277411, now seen corresponding path program 63 times [2022-04-06 20:53:14,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:14,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235008712] [2022-04-06 20:53:14,310 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:14,310 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash 523277411, now seen corresponding path program 64 times [2022-04-06 20:53:14,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:14,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736595675] [2022-04-06 20:53:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:14,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:15,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:53:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:15,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 20:53:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7821 backedges. 3964 proven. 1926 refuted. 0 times theorem prover too weak. 1931 trivial. 0 not checked. [2022-04-06 20:53:15,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:15,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736595675] [2022-04-06 20:53:15,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736595675] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:15,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237447387] [2022-04-06 20:53:15,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:53:15,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:15,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:15,014 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 20:53:15,015 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 20:53:15,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:53:15,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:15,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 20:53:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7821 backedges. 1820 proven. 6001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:19,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7821 backedges. 1822 proven. 5999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:25,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237447387] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:25,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:25,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 83, 80] total 198 [2022-04-06 20:53:25,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:25,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235008712] [2022-04-06 20:53:25,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235008712] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:25,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:25,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:53:25,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670036342] [2022-04-06 20:53:25,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:25,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:53:25,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:25,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:53:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6709, Invalid=32297, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 20:53:25,293 INFO L87 Difference]: Start difference. First operand 932 states and 1096 transitions. Second operand has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 40 states have internal predecessors, (133), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:27,013 INFO L93 Difference]: Finished difference Result 1688 states and 1998 transitions. [2022-04-06 20:53:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:53:27,013 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 40 states have internal predecessors, (133), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 249 [2022-04-06 20:53:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:27,016 INFO L225 Difference]: With dead ends: 1688 [2022-04-06 20:53:27,016 INFO L226 Difference]: Without dead ends: 984 [2022-04-06 20:53:27,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 344 SyntacticMatches, 3 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22656 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=9559, Invalid=45431, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 20:53:27,019 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 341 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:27,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 33 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-04-06 20:53:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 956. [2022-04-06 20:53:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 941 states have (on average 1.1764080765143465) internal successors, (1107), 944 states have internal predecessors, (1107), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:53:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1124 transitions. [2022-04-06 20:53:27,297 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1124 transitions. Word has length 249 [2022-04-06 20:53:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:27,297 INFO L478 AbstractCegarLoop]: Abstraction has 956 states and 1124 transitions. [2022-04-06 20:53:27,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 40 states have internal predecessors, (133), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1124 transitions. [2022-04-06 20:53:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-04-06 20:53:27,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:27,299 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 72, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:27,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:27,515 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,SelfDestructingSolverStorable46 [2022-04-06 20:53:27,515 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1296394615, now seen corresponding path program 65 times [2022-04-06 20:53:27,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:27,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1775753419] [2022-04-06 20:53:27,546 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:27,546 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:27,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1296394615, now seen corresponding path program 66 times [2022-04-06 20:53:27,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:27,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025890861] [2022-04-06 20:53:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:27,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:28,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:28,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:53:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:28,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-04-06 20:53:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8260 backedges. 4185 proven. 2035 refuted. 0 times theorem prover too weak. 2040 trivial. 0 not checked. [2022-04-06 20:53:28,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:28,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025890861] [2022-04-06 20:53:28,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025890861] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:28,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10486087] [2022-04-06 20:53:28,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:28,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:28,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:28,281 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 20:53:28,282 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 20:53:28,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:53:28,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:28,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:53:28,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8260 backedges. 111 proven. 4188 refuted. 0 times theorem prover too weak. 3961 trivial. 0 not checked. [2022-04-06 20:53:29,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8260 backedges. 7 proven. 221 refuted. 0 times theorem prover too weak. 8032 trivial. 0 not checked. [2022-04-06 20:53:29,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10486087] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:29,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:29,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 10, 8] total 54 [2022-04-06 20:53:29,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1775753419] [2022-04-06 20:53:29,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1775753419] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:29,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:29,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:53:29,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552302578] [2022-04-06 20:53:29,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:29,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:53:29,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:29,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:53:29,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=1956, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:53:29,940 INFO L87 Difference]: Start difference. First operand 956 states and 1124 transitions. Second operand has 42 states, 42 states have (on average 3.238095238095238) internal successors, (136), 41 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:31,129 INFO L93 Difference]: Finished difference Result 1730 states and 2047 transitions. [2022-04-06 20:53:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:53:31,129 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.238095238095238) internal successors, (136), 41 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 255 [2022-04-06 20:53:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:31,131 INFO L225 Difference]: With dead ends: 1730 [2022-04-06 20:53:31,131 INFO L226 Difference]: Without dead ends: 1008 [2022-04-06 20:53:31,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 501 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2501, Invalid=5871, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:53:31,133 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 354 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:31,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 33 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-04-06 20:53:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 980. [2022-04-06 20:53:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 965 states have (on average 1.1761658031088082) internal successors, (1135), 968 states have internal predecessors, (1135), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:53:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1152 transitions. [2022-04-06 20:53:31,418 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1152 transitions. Word has length 255 [2022-04-06 20:53:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:31,418 INFO L478 AbstractCegarLoop]: Abstraction has 980 states and 1152 transitions. [2022-04-06 20:53:31,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.238095238095238) internal successors, (136), 41 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1152 transitions. [2022-04-06 20:53:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-04-06 20:53:31,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:31,419 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 74, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:31,435 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 20:53:31,621 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,SelfDestructingSolverStorable47 [2022-04-06 20:53:31,621 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:31,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1300602275, now seen corresponding path program 67 times [2022-04-06 20:53:31,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:31,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1588140661] [2022-04-06 20:53:31,654 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:31,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:31,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1300602275, now seen corresponding path program 68 times [2022-04-06 20:53:31,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:31,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354576607] [2022-04-06 20:53:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:31,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:32,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:32,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:53:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:32,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-04-06 20:53:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8711 backedges. 4412 proven. 2147 refuted. 0 times theorem prover too weak. 2152 trivial. 0 not checked. [2022-04-06 20:53:32,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:32,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354576607] [2022-04-06 20:53:32,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354576607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:32,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577595183] [2022-04-06 20:53:32,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:32,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:32,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:32,339 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 20:53:32,367 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 20:53:32,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:32,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:53:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8711 backedges. 4410 proven. 2147 refuted. 0 times theorem prover too weak. 2154 trivial. 0 not checked. [2022-04-06 20:53:33,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8711 backedges. 4412 proven. 2147 refuted. 0 times theorem prover too weak. 2152 trivial. 0 not checked. [2022-04-06 20:53:35,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577595183] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:35,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:35,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 122 [2022-04-06 20:53:35,613 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:35,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1588140661] [2022-04-06 20:53:35,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1588140661] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:35,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:35,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:53:35,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006496839] [2022-04-06 20:53:35,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:35,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:53:35,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:35,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:53:35,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6405, Invalid=8357, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:53:35,615 INFO L87 Difference]: Start difference. First operand 980 states and 1152 transitions. Second operand has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:37,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:37,304 INFO L93 Difference]: Finished difference Result 1772 states and 2096 transitions. [2022-04-06 20:53:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:53:37,304 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 261 [2022-04-06 20:53:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:37,307 INFO L225 Difference]: With dead ends: 1772 [2022-04-06 20:53:37,307 INFO L226 Difference]: Without dead ends: 1032 [2022-04-06 20:53:37,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7833 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10305, Invalid=15455, Unknown=0, NotChecked=0, Total=25760 [2022-04-06 20:53:37,309 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 372 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:37,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 27 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-04-06 20:53:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1004. [2022-04-06 20:53:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 989 states have (on average 1.1759352881698686) internal successors, (1163), 992 states have internal predecessors, (1163), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:53:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1180 transitions. [2022-04-06 20:53:37,608 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1180 transitions. Word has length 261 [2022-04-06 20:53:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:37,608 INFO L478 AbstractCegarLoop]: Abstraction has 1004 states and 1180 transitions. [2022-04-06 20:53:37,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1180 transitions. [2022-04-06 20:53:37,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-04-06 20:53:37,609 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:37,609 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 76, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:37,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 20:53:37,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:37,810 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:37,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:37,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1886344265, now seen corresponding path program 69 times [2022-04-06 20:53:37,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:37,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [728793575] [2022-04-06 20:53:37,842 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:37,842 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1886344265, now seen corresponding path program 70 times [2022-04-06 20:53:37,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:37,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973553667] [2022-04-06 20:53:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:37,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:38,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:38,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:53:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:38,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 20:53:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9174 backedges. 4645 proven. 2262 refuted. 0 times theorem prover too weak. 2267 trivial. 0 not checked. [2022-04-06 20:53:38,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973553667] [2022-04-06 20:53:38,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973553667] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047011868] [2022-04-06 20:53:38,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:53:38,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:38,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:38,574 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 20:53:38,575 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 20:53:38,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:53:38,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 20:53:38,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9174 backedges. 2147 proven. 7027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:43,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9174 backedges. 2149 proven. 7025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:49,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047011868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:49,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:49,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 89, 86] total 213 [2022-04-06 20:53:49,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:49,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [728793575] [2022-04-06 20:53:49,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [728793575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:49,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:49,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:53:49,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677942983] [2022-04-06 20:53:49,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:49,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:53:49,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:49,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:53:49,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7789, Invalid=37367, Unknown=0, NotChecked=0, Total=45156 [2022-04-06 20:53:49,980 INFO L87 Difference]: Start difference. First operand 1004 states and 1180 transitions. Second operand has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 43 states have internal predecessors, (142), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:51,887 INFO L93 Difference]: Finished difference Result 1814 states and 2145 transitions. [2022-04-06 20:53:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:53:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 43 states have internal predecessors, (142), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 267 [2022-04-06 20:53:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:51,890 INFO L225 Difference]: With dead ends: 1814 [2022-04-06 20:53:51,890 INFO L226 Difference]: Without dead ends: 1056 [2022-04-06 20:53:51,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 368 SyntacticMatches, 3 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26292 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=11110, Invalid=52646, Unknown=0, NotChecked=0, Total=63756 [2022-04-06 20:53:51,893 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 351 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:51,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 33 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-04-06 20:53:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1028. [2022-04-06 20:53:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1013 states have (on average 1.175715695952616) internal successors, (1191), 1016 states have internal predecessors, (1191), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:53:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1208 transitions. [2022-04-06 20:53:52,229 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1208 transitions. Word has length 267 [2022-04-06 20:53:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:52,230 INFO L478 AbstractCegarLoop]: Abstraction has 1028 states and 1208 transitions. [2022-04-06 20:53:52,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 43 states have internal predecessors, (142), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1208 transitions. [2022-04-06 20:53:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-04-06 20:53:52,232 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:52,232 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 78, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:52,259 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 20:53:52,447 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,SelfDestructingSolverStorable49 [2022-04-06 20:53:52,448 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash -340302109, now seen corresponding path program 71 times [2022-04-06 20:53:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:52,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [63475502] [2022-04-06 20:53:52,479 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:52,479 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash -340302109, now seen corresponding path program 72 times [2022-04-06 20:53:52,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:52,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709629518] [2022-04-06 20:53:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:52,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:53,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:53,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:53:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:53,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-04-06 20:53:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9649 backedges. 4884 proven. 2380 refuted. 0 times theorem prover too weak. 2385 trivial. 0 not checked. [2022-04-06 20:53:53,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:53,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709629518] [2022-04-06 20:53:53,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709629518] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:53,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734383079] [2022-04-06 20:53:53,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:53,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:53,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:53,315 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 20:53:53,316 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 20:53:53,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:53:53,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:53:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9649 backedges. 120 proven. 4887 refuted. 0 times theorem prover too weak. 4642 trivial. 0 not checked. [2022-04-06 20:53:54,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9649 backedges. 7 proven. 239 refuted. 0 times theorem prover too weak. 9403 trivial. 0 not checked. [2022-04-06 20:53:54,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734383079] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:54,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:54,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 10, 8] total 57 [2022-04-06 20:53:54,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:54,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [63475502] [2022-04-06 20:53:54,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [63475502] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:54,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:54,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:53:54,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995446649] [2022-04-06 20:53:54,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:54,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:53:54,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:54,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:53:54,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=2157, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:53:54,972 INFO L87 Difference]: Start difference. First operand 1028 states and 1208 transitions. Second operand has 45 states, 45 states have (on average 3.2222222222222223) internal successors, (145), 44 states have internal predecessors, (145), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:56,319 INFO L93 Difference]: Finished difference Result 1856 states and 2194 transitions. [2022-04-06 20:53:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:53:56,319 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2222222222222223) internal successors, (145), 44 states have internal predecessors, (145), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 273 [2022-04-06 20:53:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:56,322 INFO L225 Difference]: With dead ends: 1856 [2022-04-06 20:53:56,322 INFO L226 Difference]: Without dead ends: 1080 [2022-04-06 20:53:56,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 537 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2879, Invalid=6627, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:53:56,323 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 384 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:56,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 31 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-04-06 20:53:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1052. [2022-04-06 20:53:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1037 states have (on average 1.175506268081003) internal successors, (1219), 1040 states have internal predecessors, (1219), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:53:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1236 transitions. [2022-04-06 20:53:56,721 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1236 transitions. Word has length 273 [2022-04-06 20:53:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:56,722 INFO L478 AbstractCegarLoop]: Abstraction has 1052 states and 1236 transitions. [2022-04-06 20:53:56,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2222222222222223) internal successors, (145), 44 states have internal predecessors, (145), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1236 transitions. [2022-04-06 20:53:56,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-04-06 20:53:56,723 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:56,724 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 80, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:56,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 20:53:56,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:56,924 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash 589688311, now seen corresponding path program 73 times [2022-04-06 20:53:56,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:56,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [200186048] [2022-04-06 20:53:56,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:56,953 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:56,953 INFO L85 PathProgramCache]: Analyzing trace with hash 589688311, now seen corresponding path program 74 times [2022-04-06 20:53:56,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:56,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696117175] [2022-04-06 20:53:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:57,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:57,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:53:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:57,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-04-06 20:53:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10136 backedges. 5129 proven. 2501 refuted. 0 times theorem prover too weak. 2506 trivial. 0 not checked. [2022-04-06 20:53:57,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696117175] [2022-04-06 20:53:57,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696117175] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696873346] [2022-04-06 20:53:57,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:57,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:57,706 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 20:53:57,708 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 20:53:57,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:53:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10136 backedges. 5127 proven. 2501 refuted. 0 times theorem prover too weak. 2508 trivial. 0 not checked. [2022-04-06 20:53:59,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10136 backedges. 5129 proven. 2501 refuted. 0 times theorem prover too weak. 2506 trivial. 0 not checked. [2022-04-06 20:54:01,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696873346] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:01,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:01,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 131 [2022-04-06 20:54:01,301 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:01,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [200186048] [2022-04-06 20:54:01,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [200186048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:01,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:01,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:54:01,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363471278] [2022-04-06 20:54:01,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:01,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:54:01,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:01,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:54:01,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7401, Invalid=9629, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 20:54:01,303 INFO L87 Difference]: Start difference. First operand 1052 states and 1236 transitions. Second operand has 46 states, 46 states have (on average 3.217391304347826) internal successors, (148), 45 states have internal predecessors, (148), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:03,194 INFO L93 Difference]: Finished difference Result 1898 states and 2243 transitions. [2022-04-06 20:54:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:54:03,194 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.217391304347826) internal successors, (148), 45 states have internal predecessors, (148), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 279 [2022-04-06 20:54:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:03,197 INFO L225 Difference]: With dead ends: 1898 [2022-04-06 20:54:03,197 INFO L226 Difference]: Without dead ends: 1104 [2022-04-06 20:54:03,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9066 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11916, Invalid=17840, Unknown=0, NotChecked=0, Total=29756 [2022-04-06 20:54:03,199 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 402 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:03,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 29 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:54:03,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-04-06 20:54:03,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1076. [2022-04-06 20:54:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1061 states have (on average 1.175306314797361) internal successors, (1247), 1064 states have internal predecessors, (1247), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:54:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1264 transitions. [2022-04-06 20:54:03,537 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1264 transitions. Word has length 279 [2022-04-06 20:54:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:03,537 INFO L478 AbstractCegarLoop]: Abstraction has 1076 states and 1264 transitions. [2022-04-06 20:54:03,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.217391304347826) internal successors, (148), 45 states have internal predecessors, (148), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1264 transitions. [2022-04-06 20:54:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-04-06 20:54:03,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:03,539 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 82, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:03,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:03,739 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,SelfDestructingSolverStorable51 [2022-04-06 20:54:03,739 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:03,740 INFO L85 PathProgramCache]: Analyzing trace with hash 833482787, now seen corresponding path program 75 times [2022-04-06 20:54:03,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:03,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1606521330] [2022-04-06 20:54:03,784 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:03,784 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash 833482787, now seen corresponding path program 76 times [2022-04-06 20:54:03,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:03,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125313006] [2022-04-06 20:54:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:03,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:04,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:04,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:54:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-04-06 20:54:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10635 backedges. 5380 proven. 2625 refuted. 0 times theorem prover too weak. 2630 trivial. 0 not checked. [2022-04-06 20:54:04,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:04,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125313006] [2022-04-06 20:54:04,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125313006] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:04,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435305560] [2022-04-06 20:54:04,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:54:04,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:04,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:04,726 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 20:54:04,727 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 20:54:04,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:54:04,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:04,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 20:54:04,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10635 backedges. 2501 proven. 8134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:10,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10635 backedges. 2503 proven. 8132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:17,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435305560] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:17,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:17,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 95, 92] total 228 [2022-04-06 20:54:17,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:17,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1606521330] [2022-04-06 20:54:17,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1606521330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:17,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:17,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:54:17,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84426381] [2022-04-06 20:54:17,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:17,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:54:17,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:54:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8950, Invalid=42806, Unknown=0, NotChecked=0, Total=51756 [2022-04-06 20:54:17,668 INFO L87 Difference]: Start difference. First operand 1076 states and 1264 transitions. Second operand has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 46 states have internal predecessors, (151), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:19,805 INFO L93 Difference]: Finished difference Result 1940 states and 2292 transitions. [2022-04-06 20:54:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:54:19,806 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 46 states have internal predecessors, (151), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 285 [2022-04-06 20:54:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:19,808 INFO L225 Difference]: With dead ends: 1940 [2022-04-06 20:54:19,809 INFO L226 Difference]: Without dead ends: 1128 [2022-04-06 20:54:19,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 392 SyntacticMatches, 3 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30198 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=12778, Invalid=60392, Unknown=0, NotChecked=0, Total=73170 [2022-04-06 20:54:19,812 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 401 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:19,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 35 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:54:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-04-06 20:54:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1100. [2022-04-06 20:54:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1085 states have (on average 1.1751152073732718) internal successors, (1275), 1088 states have internal predecessors, (1275), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:54:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1292 transitions. [2022-04-06 20:54:20,177 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1292 transitions. Word has length 285 [2022-04-06 20:54:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:20,178 INFO L478 AbstractCegarLoop]: Abstraction has 1100 states and 1292 transitions. [2022-04-06 20:54:20,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 46 states have internal predecessors, (151), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1292 transitions. [2022-04-06 20:54:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-04-06 20:54:20,180 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:20,180 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 84, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:20,204 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 20:54:20,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:20,403 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash 251473975, now seen corresponding path program 77 times [2022-04-06 20:54:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:20,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [828427975] [2022-04-06 20:54:20,436 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:20,436 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash 251473975, now seen corresponding path program 78 times [2022-04-06 20:54:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:20,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016124010] [2022-04-06 20:54:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:20,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:21,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:21,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:54:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:21,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-04-06 20:54:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11146 backedges. 5637 proven. 2752 refuted. 0 times theorem prover too weak. 2757 trivial. 0 not checked. [2022-04-06 20:54:21,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:21,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016124010] [2022-04-06 20:54:21,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016124010] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:21,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278096022] [2022-04-06 20:54:21,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:54:21,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:21,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:21,307 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 20:54:21,308 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 20:54:21,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:54:21,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:21,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:54:21,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11146 backedges. 129 proven. 5640 refuted. 0 times theorem prover too weak. 5377 trivial. 0 not checked. [2022-04-06 20:54:22,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11146 backedges. 7 proven. 257 refuted. 0 times theorem prover too weak. 10882 trivial. 0 not checked. [2022-04-06 20:54:23,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278096022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:23,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:23,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 10, 8] total 60 [2022-04-06 20:54:23,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [828427975] [2022-04-06 20:54:23,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [828427975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:23,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:23,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:54:23,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87240181] [2022-04-06 20:54:23,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:23,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:54:23,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:54:23,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1173, Invalid=2367, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:54:23,088 INFO L87 Difference]: Start difference. First operand 1100 states and 1292 transitions. Second operand has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 47 states have internal predecessors, (154), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:24,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:24,605 INFO L93 Difference]: Finished difference Result 1982 states and 2341 transitions. [2022-04-06 20:54:24,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:54:24,606 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 47 states have internal predecessors, (154), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 291 [2022-04-06 20:54:24,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:24,609 INFO L225 Difference]: With dead ends: 1982 [2022-04-06 20:54:24,609 INFO L226 Difference]: Without dead ends: 1152 [2022-04-06 20:54:24,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 573 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3284, Invalid=7428, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:54:24,611 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 394 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:24,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 35 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:54:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-04-06 20:54:24,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1124. [2022-04-06 20:54:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1109 states have (on average 1.174932371505861) internal successors, (1303), 1112 states have internal predecessors, (1303), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:54:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1320 transitions. [2022-04-06 20:54:24,978 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1320 transitions. Word has length 291 [2022-04-06 20:54:24,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:24,978 INFO L478 AbstractCegarLoop]: Abstraction has 1124 states and 1320 transitions. [2022-04-06 20:54:24,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 47 states have internal predecessors, (154), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:24,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1320 transitions. [2022-04-06 20:54:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-04-06 20:54:24,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:24,981 INFO L499 BasicCegarLoop]: trace histogram [88, 88, 86, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:24,996 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 20:54:25,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:25,181 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash -716097181, now seen corresponding path program 79 times [2022-04-06 20:54:25,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:25,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1803942111] [2022-04-06 20:54:25,205 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:25,205 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:25,205 INFO L85 PathProgramCache]: Analyzing trace with hash -716097181, now seen corresponding path program 80 times [2022-04-06 20:54:25,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:25,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382314356] [2022-04-06 20:54:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:25,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:26,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:26,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:54:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:26,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-04-06 20:54:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11669 backedges. 5900 proven. 2882 refuted. 0 times theorem prover too weak. 2887 trivial. 0 not checked. [2022-04-06 20:54:26,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:26,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382314356] [2022-04-06 20:54:26,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382314356] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:26,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341019948] [2022-04-06 20:54:26,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:54:26,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:26,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:26,147 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 20:54:26,148 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 20:54:26,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:54:26,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:26,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:54:26,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11669 backedges. 5898 proven. 2882 refuted. 0 times theorem prover too weak. 2889 trivial. 0 not checked. [2022-04-06 20:54:27,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11669 backedges. 5900 proven. 2882 refuted. 0 times theorem prover too weak. 2887 trivial. 0 not checked. [2022-04-06 20:54:30,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341019948] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:30,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:30,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 140 [2022-04-06 20:54:30,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:30,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1803942111] [2022-04-06 20:54:30,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1803942111] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:30,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:30,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:54:30,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100605483] [2022-04-06 20:54:30,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:30,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:54:30,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:30,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:54:30,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8469, Invalid=10991, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 20:54:30,127 INFO L87 Difference]: Start difference. First operand 1124 states and 1320 transitions. Second operand has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 48 states have internal predecessors, (157), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:32,278 INFO L93 Difference]: Finished difference Result 2024 states and 2390 transitions. [2022-04-06 20:54:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:54:32,279 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 48 states have internal predecessors, (157), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 297 [2022-04-06 20:54:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:32,282 INFO L225 Difference]: With dead ends: 2024 [2022-04-06 20:54:32,282 INFO L226 Difference]: Without dead ends: 1176 [2022-04-06 20:54:32,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10389 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13644, Invalid=20396, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 20:54:32,285 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 404 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:32,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 31 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:54:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-04-06 20:54:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1148. [2022-04-06 20:54:32,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1133 states have (on average 1.174757281553398) internal successors, (1331), 1136 states have internal predecessors, (1331), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:54:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1348 transitions. [2022-04-06 20:54:32,698 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1348 transitions. Word has length 297 [2022-04-06 20:54:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:32,698 INFO L478 AbstractCegarLoop]: Abstraction has 1148 states and 1348 transitions. [2022-04-06 20:54:32,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 48 states have internal predecessors, (157), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1348 transitions. [2022-04-06 20:54:32,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-04-06 20:54:32,700 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:32,700 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 88, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:32,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-06 20:54:32,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 20:54:32,900 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:32,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1276015223, now seen corresponding path program 81 times [2022-04-06 20:54:32,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:32,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1002350610] [2022-04-06 20:54:32,925 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:32,926 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:32,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1276015223, now seen corresponding path program 82 times [2022-04-06 20:54:32,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:32,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485738328] [2022-04-06 20:54:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:32,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:33,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:33,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:54:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:33,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-04-06 20:54:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12204 backedges. 6169 proven. 3015 refuted. 0 times theorem prover too weak. 3020 trivial. 0 not checked. [2022-04-06 20:54:33,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485738328] [2022-04-06 20:54:33,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485738328] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833394866] [2022-04-06 20:54:33,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:54:33,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:33,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:33,873 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 20:54:33,874 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 20:54:33,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:54:33,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:33,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 20:54:33,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12204 backedges. 2882 proven. 9322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:40,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12204 backedges. 2884 proven. 9320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:48,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833394866] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:48,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:48,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 101, 98] total 243 [2022-04-06 20:54:48,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:48,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1002350610] [2022-04-06 20:54:48,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1002350610] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:48,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:48,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:54:48,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145055353] [2022-04-06 20:54:48,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:48,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:54:48,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:48,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:54:48,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10192, Invalid=48614, Unknown=0, NotChecked=0, Total=58806 [2022-04-06 20:54:48,155 INFO L87 Difference]: Start difference. First operand 1148 states and 1348 transitions. Second operand has 50 states, 50 states have (on average 3.2) internal successors, (160), 49 states have internal predecessors, (160), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:50,540 INFO L93 Difference]: Finished difference Result 2066 states and 2439 transitions. [2022-04-06 20:54:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:54:50,541 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.2) internal successors, (160), 49 states have internal predecessors, (160), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 303 [2022-04-06 20:54:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:50,543 INFO L225 Difference]: With dead ends: 2066 [2022-04-06 20:54:50,543 INFO L226 Difference]: Without dead ends: 1200 [2022-04-06 20:54:50,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 416 SyntacticMatches, 3 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34374 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=14563, Invalid=68669, Unknown=0, NotChecked=0, Total=83232 [2022-04-06 20:54:50,548 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 439 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:50,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 29 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:54:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-04-06 20:54:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1172. [2022-04-06 20:54:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1157 states have (on average 1.1745894554883318) internal successors, (1359), 1160 states have internal predecessors, (1359), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:54:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1376 transitions. [2022-04-06 20:54:51,067 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1376 transitions. Word has length 303 [2022-04-06 20:54:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:51,068 INFO L478 AbstractCegarLoop]: Abstraction has 1172 states and 1376 transitions. [2022-04-06 20:54:51,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.2) internal successors, (160), 49 states have internal predecessors, (160), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1376 transitions. [2022-04-06 20:54:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-04-06 20:54:51,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:51,070 INFO L499 BasicCegarLoop]: trace histogram [92, 92, 90, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:51,086 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 20:54:51,270 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,SelfDestructingSolverStorable55 [2022-04-06 20:54:51,270 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1970715997, now seen corresponding path program 83 times [2022-04-06 20:54:51,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:51,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [146301822] [2022-04-06 20:54:51,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:51,303 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1970715997, now seen corresponding path program 84 times [2022-04-06 20:54:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:51,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105662063] [2022-04-06 20:54:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:51,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:52,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:52,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:54:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:52,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-04-06 20:54:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12751 backedges. 6444 proven. 3151 refuted. 0 times theorem prover too weak. 3156 trivial. 0 not checked. [2022-04-06 20:54:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105662063] [2022-04-06 20:54:52,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105662063] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449989692] [2022-04-06 20:54:52,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:54:52,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:52,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:52,197 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 20:54:52,198 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 20:54:52,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:54:52,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:54:52,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12751 backedges. 138 proven. 6447 refuted. 0 times theorem prover too weak. 6166 trivial. 0 not checked. [2022-04-06 20:54:53,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12751 backedges. 7 proven. 275 refuted. 0 times theorem prover too weak. 12469 trivial. 0 not checked. [2022-04-06 20:54:54,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449989692] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:54,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:54,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 10, 8] total 63 [2022-04-06 20:54:54,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:54,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [146301822] [2022-04-06 20:54:54,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [146301822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:54,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:54,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:54:54,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487856659] [2022-04-06 20:54:54,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:54,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:54:54,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:54:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1320, Invalid=2586, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:54:54,033 INFO L87 Difference]: Start difference. First operand 1172 states and 1376 transitions. Second operand has 51 states, 51 states have (on average 3.196078431372549) internal successors, (163), 50 states have internal predecessors, (163), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:55,685 INFO L93 Difference]: Finished difference Result 2108 states and 2488 transitions. [2022-04-06 20:54:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:54:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.196078431372549) internal successors, (163), 50 states have internal predecessors, (163), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 309 [2022-04-06 20:54:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:55,687 INFO L225 Difference]: With dead ends: 2108 [2022-04-06 20:54:55,687 INFO L226 Difference]: Without dead ends: 1224 [2022-04-06 20:54:55,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 609 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3716, Invalid=8274, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:54:55,689 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 418 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:55,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 31 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:54:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-04-06 20:54:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1196. [2022-04-06 20:54:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 1181 states have (on average 1.174428450465707) internal successors, (1387), 1184 states have internal predecessors, (1387), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:54:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1404 transitions. [2022-04-06 20:54:56,111 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1404 transitions. Word has length 309 [2022-04-06 20:54:56,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:56,111 INFO L478 AbstractCegarLoop]: Abstraction has 1196 states and 1404 transitions. [2022-04-06 20:54:56,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.196078431372549) internal successors, (163), 50 states have internal predecessors, (163), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1404 transitions. [2022-04-06 20:54:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-04-06 20:54:56,113 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:56,113 INFO L499 BasicCegarLoop]: trace histogram [94, 94, 92, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:56,129 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 20:54:56,313 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,SelfDestructingSolverStorable56 [2022-04-06 20:54:56,313 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1162982583, now seen corresponding path program 85 times [2022-04-06 20:54:56,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:56,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2110072605] [2022-04-06 20:54:56,339 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:56,339 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1162982583, now seen corresponding path program 86 times [2022-04-06 20:54:56,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:56,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343772493] [2022-04-06 20:54:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:56,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:57,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:57,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:54:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:57,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-06 20:54:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13310 backedges. 6725 proven. 3290 refuted. 0 times theorem prover too weak. 3295 trivial. 0 not checked. [2022-04-06 20:54:57,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:57,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343772493] [2022-04-06 20:54:57,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343772493] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:57,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110455246] [2022-04-06 20:54:57,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:54:57,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:57,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:57,328 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 20:54:57,329 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 20:54:57,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:54:57,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:57,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:54:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13310 backedges. 6723 proven. 3290 refuted. 0 times theorem prover too weak. 3297 trivial. 0 not checked. [2022-04-06 20:54:59,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13310 backedges. 6725 proven. 3290 refuted. 0 times theorem prover too weak. 3295 trivial. 0 not checked. [2022-04-06 20:55:01,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110455246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:01,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:01,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 149 [2022-04-06 20:55:01,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:01,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2110072605] [2022-04-06 20:55:01,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2110072605] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:01,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:01,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:55:01,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860062780] [2022-04-06 20:55:01,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:01,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:55:01,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:01,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:55:01,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9609, Invalid=12443, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 20:55:01,721 INFO L87 Difference]: Start difference. First operand 1196 states and 1404 transitions. Second operand has 52 states, 52 states have (on average 3.1923076923076925) internal successors, (166), 51 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:04,197 INFO L93 Difference]: Finished difference Result 2150 states and 2537 transitions. [2022-04-06 20:55:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:55:04,197 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.1923076923076925) internal successors, (166), 51 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 315 [2022-04-06 20:55:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:04,199 INFO L225 Difference]: With dead ends: 2150 [2022-04-06 20:55:04,199 INFO L226 Difference]: Without dead ends: 1248 [2022-04-06 20:55:04,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11802 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15489, Invalid=23123, Unknown=0, NotChecked=0, Total=38612 [2022-04-06 20:55:04,202 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 416 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:04,202 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 35 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:55:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-04-06 20:55:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1220. [2022-04-06 20:55:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1205 states have (on average 1.1742738589211619) internal successors, (1415), 1208 states have internal predecessors, (1415), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:55:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1432 transitions. [2022-04-06 20:55:04,636 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1432 transitions. Word has length 315 [2022-04-06 20:55:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:04,636 INFO L478 AbstractCegarLoop]: Abstraction has 1220 states and 1432 transitions. [2022-04-06 20:55:04,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.1923076923076925) internal successors, (166), 51 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1432 transitions. [2022-04-06 20:55:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-04-06 20:55:04,638 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:04,638 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 94, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:04,654 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 20:55:04,838 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,SelfDestructingSolverStorable57 [2022-04-06 20:55:04,838 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:04,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2093085725, now seen corresponding path program 87 times [2022-04-06 20:55:04,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:04,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2011235335] [2022-04-06 20:55:04,869 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:04,869 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:04,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2093085725, now seen corresponding path program 88 times [2022-04-06 20:55:04,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:04,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022831744] [2022-04-06 20:55:04,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:04,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:05,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:05,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:55:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:05,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-04-06 20:55:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13881 backedges. 7012 proven. 3432 refuted. 0 times theorem prover too weak. 3437 trivial. 0 not checked. [2022-04-06 20:55:05,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:05,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022831744] [2022-04-06 20:55:05,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022831744] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:05,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799199988] [2022-04-06 20:55:05,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:55:05,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:05,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:05,827 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 20:55:05,827 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 20:55:05,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:55:05,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:05,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 114 conjunts are in the unsatisfiable core [2022-04-06 20:55:05,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13881 backedges. 3290 proven. 10591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:55:12,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13881 backedges. 3292 proven. 10589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:55:21,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799199988] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:21,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:21,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 107, 104] total 258 [2022-04-06 20:55:21,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:21,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2011235335] [2022-04-06 20:55:21,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2011235335] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:21,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:21,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:55:21,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675059415] [2022-04-06 20:55:21,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:21,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:55:21,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:21,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:55:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11515, Invalid=54791, Unknown=0, NotChecked=0, Total=66306 [2022-04-06 20:55:21,588 INFO L87 Difference]: Start difference. First operand 1220 states and 1432 transitions. Second operand has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 52 states have internal predecessors, (169), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:24,284 INFO L93 Difference]: Finished difference Result 2192 states and 2586 transitions. [2022-04-06 20:55:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:55:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 52 states have internal predecessors, (169), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 321 [2022-04-06 20:55:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:24,286 INFO L225 Difference]: With dead ends: 2192 [2022-04-06 20:55:24,286 INFO L226 Difference]: Without dead ends: 1272 [2022-04-06 20:55:24,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 440 SyntacticMatches, 3 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38820 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=16465, Invalid=77477, Unknown=0, NotChecked=0, Total=93942 [2022-04-06 20:55:24,291 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 466 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:24,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 33 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:55:24,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-04-06 20:55:24,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1244. [2022-04-06 20:55:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1229 states have (on average 1.174125305126119) internal successors, (1443), 1232 states have internal predecessors, (1443), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:55:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1460 transitions. [2022-04-06 20:55:24,752 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1460 transitions. Word has length 321 [2022-04-06 20:55:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:24,752 INFO L478 AbstractCegarLoop]: Abstraction has 1244 states and 1460 transitions. [2022-04-06 20:55:24,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.188679245283019) internal successors, (169), 52 states have internal predecessors, (169), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1460 transitions. [2022-04-06 20:55:24,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-04-06 20:55:24,754 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:24,754 INFO L499 BasicCegarLoop]: trace histogram [98, 98, 96, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:24,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:24,955 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,SelfDestructingSolverStorable58 [2022-04-06 20:55:24,955 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1472132855, now seen corresponding path program 89 times [2022-04-06 20:55:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:24,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1936265252] [2022-04-06 20:55:24,984 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:24,984 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:24,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1472132855, now seen corresponding path program 90 times [2022-04-06 20:55:24,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:24,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175159799] [2022-04-06 20:55:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:24,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:26,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:26,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:55:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:26,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-04-06 20:55:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14464 backedges. 7305 proven. 3577 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2022-04-06 20:55:26,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:26,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175159799] [2022-04-06 20:55:26,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175159799] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:26,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830448037] [2022-04-06 20:55:26,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:55:26,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:26,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:26,079 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 20:55:26,086 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 20:55:26,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:55:26,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:26,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:55:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14464 backedges. 147 proven. 7308 refuted. 0 times theorem prover too weak. 7009 trivial. 0 not checked. [2022-04-06 20:55:27,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14464 backedges. 7 proven. 293 refuted. 0 times theorem prover too weak. 14164 trivial. 0 not checked. [2022-04-06 20:55:28,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830448037] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:28,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:28,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 10, 8] total 66 [2022-04-06 20:55:28,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:28,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1936265252] [2022-04-06 20:55:28,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1936265252] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:28,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:28,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:55:28,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406298920] [2022-04-06 20:55:28,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:28,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:55:28,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:28,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:55:28,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1476, Invalid=2814, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:55:28,051 INFO L87 Difference]: Start difference. First operand 1244 states and 1460 transitions. Second operand has 54 states, 54 states have (on average 3.185185185185185) internal successors, (172), 53 states have internal predecessors, (172), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:29,926 INFO L93 Difference]: Finished difference Result 2234 states and 2635 transitions. [2022-04-06 20:55:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:55:29,926 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.185185185185185) internal successors, (172), 53 states have internal predecessors, (172), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 327 [2022-04-06 20:55:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:29,928 INFO L225 Difference]: With dead ends: 2234 [2022-04-06 20:55:29,928 INFO L226 Difference]: Without dead ends: 1296 [2022-04-06 20:55:29,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 645 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4175, Invalid=9165, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:55:29,929 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 433 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:29,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 37 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:55:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-04-06 20:55:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1268. [2022-04-06 20:55:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1253 states have (on average 1.1739824421388667) internal successors, (1471), 1256 states have internal predecessors, (1471), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:55:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1488 transitions. [2022-04-06 20:55:30,389 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1488 transitions. Word has length 327 [2022-04-06 20:55:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:30,390 INFO L478 AbstractCegarLoop]: Abstraction has 1268 states and 1488 transitions. [2022-04-06 20:55:30,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.185185185185185) internal successors, (172), 53 states have internal predecessors, (172), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1488 transitions. [2022-04-06 20:55:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-04-06 20:55:30,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:30,393 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 98, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:30,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:30,614 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,SelfDestructingSolverStorable59 [2022-04-06 20:55:30,615 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:30,615 INFO L85 PathProgramCache]: Analyzing trace with hash -279472861, now seen corresponding path program 91 times [2022-04-06 20:55:30,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:30,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2025738740] [2022-04-06 20:55:30,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:30,644 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash -279472861, now seen corresponding path program 92 times [2022-04-06 20:55:30,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:30,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152590403] [2022-04-06 20:55:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:30,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:31,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:31,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:55:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:31,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-04-06 20:55:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15059 backedges. 7604 proven. 3725 refuted. 0 times theorem prover too weak. 3730 trivial. 0 not checked. [2022-04-06 20:55:31,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:31,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152590403] [2022-04-06 20:55:31,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152590403] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:31,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672212541] [2022-04-06 20:55:31,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:55:31,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:31,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:31,692 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 20:55:31,693 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 20:55:31,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:55:31,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:55:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15059 backedges. 7602 proven. 3725 refuted. 0 times theorem prover too weak. 3732 trivial. 0 not checked. [2022-04-06 20:55:33,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15059 backedges. 7604 proven. 3725 refuted. 0 times theorem prover too weak. 3730 trivial. 0 not checked. [2022-04-06 20:55:36,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672212541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:36,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:36,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 158 [2022-04-06 20:55:36,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:36,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2025738740] [2022-04-06 20:55:36,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2025738740] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:36,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:36,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:55:36,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815505381] [2022-04-06 20:55:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:36,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:55:36,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:55:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10821, Invalid=13985, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 20:55:36,553 INFO L87 Difference]: Start difference. First operand 1268 states and 1488 transitions. Second operand has 55 states, 55 states have (on average 3.1818181818181817) internal successors, (175), 54 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:39,249 INFO L93 Difference]: Finished difference Result 2276 states and 2684 transitions. [2022-04-06 20:55:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:55:39,249 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.1818181818181817) internal successors, (175), 54 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 333 [2022-04-06 20:55:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:39,251 INFO L225 Difference]: With dead ends: 2276 [2022-04-06 20:55:39,251 INFO L226 Difference]: Without dead ends: 1320 [2022-04-06 20:55:39,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13305 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17451, Invalid=26021, Unknown=0, NotChecked=0, Total=43472 [2022-04-06 20:55:39,254 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 461 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:39,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 29 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:55:39,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-04-06 20:55:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1292. [2022-04-06 20:55:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1277 states have (on average 1.1738449490994518) internal successors, (1499), 1280 states have internal predecessors, (1499), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:55:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 1516 transitions. [2022-04-06 20:55:39,742 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 1516 transitions. Word has length 333 [2022-04-06 20:55:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:39,742 INFO L478 AbstractCegarLoop]: Abstraction has 1292 states and 1516 transitions. [2022-04-06 20:55:39,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.1818181818181817) internal successors, (175), 54 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 1516 transitions. [2022-04-06 20:55:39,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-04-06 20:55:39,744 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:39,744 INFO L499 BasicCegarLoop]: trace histogram [102, 102, 100, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:39,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 20:55:39,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:39,945 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1380858167, now seen corresponding path program 93 times [2022-04-06 20:55:39,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:39,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583658636] [2022-04-06 20:55:39,971 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:39,971 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:39,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1380858167, now seen corresponding path program 94 times [2022-04-06 20:55:39,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:39,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590265738] [2022-04-06 20:55:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:39,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:41,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:41,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:55:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:41,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-04-06 20:55:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 15666 backedges. 7909 proven. 3876 refuted. 0 times theorem prover too weak. 3881 trivial. 0 not checked. [2022-04-06 20:55:41,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:41,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590265738] [2022-04-06 20:55:41,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590265738] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:41,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385555606] [2022-04-06 20:55:41,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:55:41,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:41,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:41,045 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 20:55:41,045 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 20:55:41,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:55:41,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:41,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 120 conjunts are in the unsatisfiable core [2022-04-06 20:55:41,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15666 backedges. 3725 proven. 11941 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:55:48,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15666 backedges. 3727 proven. 11939 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:55:58,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385555606] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:58,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:58,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 113, 110] total 273 [2022-04-06 20:55:58,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:58,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583658636] [2022-04-06 20:55:58,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583658636] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:58,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:58,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:55:58,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649494410] [2022-04-06 20:55:58,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:58,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:55:58,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:58,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:55:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12919, Invalid=61337, Unknown=0, NotChecked=0, Total=74256 [2022-04-06 20:55:58,189 INFO L87 Difference]: Start difference. First operand 1292 states and 1516 transitions. Second operand has 56 states, 56 states have (on average 3.1785714285714284) internal successors, (178), 55 states have internal predecessors, (178), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:01,242 INFO L93 Difference]: Finished difference Result 2318 states and 2733 transitions. [2022-04-06 20:56:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:56:01,242 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.1785714285714284) internal successors, (178), 55 states have internal predecessors, (178), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 339 [2022-04-06 20:56:01,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:01,244 INFO L225 Difference]: With dead ends: 2318 [2022-04-06 20:56:01,244 INFO L226 Difference]: Without dead ends: 1344 [2022-04-06 20:56:01,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 464 SyntacticMatches, 3 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43536 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=18484, Invalid=86816, Unknown=0, NotChecked=0, Total=105300 [2022-04-06 20:56:01,249 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 534 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:01,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 29 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:56:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-04-06 20:56:01,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1316. [2022-04-06 20:56:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1301 states have (on average 1.1737125288239816) internal successors, (1527), 1304 states have internal predecessors, (1527), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:56:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1544 transitions. [2022-04-06 20:56:01,781 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1544 transitions. Word has length 339 [2022-04-06 20:56:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:01,781 INFO L478 AbstractCegarLoop]: Abstraction has 1316 states and 1544 transitions. [2022-04-06 20:56:01,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.1785714285714284) internal successors, (178), 55 states have internal predecessors, (178), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:01,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1544 transitions. [2022-04-06 20:56:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-04-06 20:56:01,783 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:01,784 INFO L499 BasicCegarLoop]: trace histogram [104, 104, 102, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:01,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:01,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:01,987 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:01,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:01,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2092818019, now seen corresponding path program 95 times [2022-04-06 20:56:01,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:01,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1772252145] [2022-04-06 20:56:02,015 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:02,016 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2092818019, now seen corresponding path program 96 times [2022-04-06 20:56:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:02,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314280568] [2022-04-06 20:56:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:02,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:03,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:03,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:56:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:03,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-04-06 20:56:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16285 backedges. 8220 proven. 4030 refuted. 0 times theorem prover too weak. 4035 trivial. 0 not checked. [2022-04-06 20:56:03,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:03,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314280568] [2022-04-06 20:56:03,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314280568] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:03,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284622769] [2022-04-06 20:56:03,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:56:03,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:03,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:03,088 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 20:56:03,090 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 20:56:03,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:56:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:03,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:56:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16285 backedges. 156 proven. 8223 refuted. 0 times theorem prover too weak. 7906 trivial. 0 not checked. [2022-04-06 20:56:04,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16285 backedges. 7 proven. 311 refuted. 0 times theorem prover too weak. 15967 trivial. 0 not checked. [2022-04-06 20:56:05,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284622769] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:05,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:05,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 10, 8] total 69 [2022-04-06 20:56:05,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:05,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1772252145] [2022-04-06 20:56:05,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1772252145] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:05,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:05,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:56:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137405415] [2022-04-06 20:56:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:05,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:56:05,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:05,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:56:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1641, Invalid=3051, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:56:05,169 INFO L87 Difference]: Start difference. First operand 1316 states and 1544 transitions. Second operand has 57 states, 57 states have (on average 3.175438596491228) internal successors, (181), 56 states have internal predecessors, (181), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:07,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:07,248 INFO L93 Difference]: Finished difference Result 2360 states and 2782 transitions. [2022-04-06 20:56:07,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:56:07,248 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.175438596491228) internal successors, (181), 56 states have internal predecessors, (181), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 345 [2022-04-06 20:56:07,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:07,250 INFO L225 Difference]: With dead ends: 2360 [2022-04-06 20:56:07,250 INFO L226 Difference]: Without dead ends: 1368 [2022-04-06 20:56:07,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 681 SyntacticMatches, 3 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4661, Invalid=10101, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:56:07,252 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 541 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:07,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 27 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:56:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-04-06 20:56:07,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1340. [2022-04-06 20:56:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1325 states have (on average 1.1735849056603773) internal successors, (1555), 1328 states have internal predecessors, (1555), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:56:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1572 transitions. [2022-04-06 20:56:07,768 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1572 transitions. Word has length 345 [2022-04-06 20:56:07,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:07,769 INFO L478 AbstractCegarLoop]: Abstraction has 1340 states and 1572 transitions. [2022-04-06 20:56:07,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.175438596491228) internal successors, (181), 56 states have internal predecessors, (181), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1572 transitions. [2022-04-06 20:56:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-04-06 20:56:07,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:07,771 INFO L499 BasicCegarLoop]: trace histogram [106, 106, 104, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:07,787 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 20:56:07,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:07,972 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:07,972 INFO L85 PathProgramCache]: Analyzing trace with hash -168330377, now seen corresponding path program 97 times [2022-04-06 20:56:07,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:07,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1108202552] [2022-04-06 20:56:08,002 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:08,002 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:08,002 INFO L85 PathProgramCache]: Analyzing trace with hash -168330377, now seen corresponding path program 98 times [2022-04-06 20:56:08,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:08,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230935926] [2022-04-06 20:56:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:08,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:09,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:09,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:56:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:09,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-04-06 20:56:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16916 backedges. 8537 proven. 4187 refuted. 0 times theorem prover too weak. 4192 trivial. 0 not checked. [2022-04-06 20:56:09,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:09,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230935926] [2022-04-06 20:56:09,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230935926] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:09,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577630165] [2022-04-06 20:56:09,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:56:09,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:09,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:09,154 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 20:56:09,164 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 20:56:09,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:56:09,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:09,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:56:09,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16916 backedges. 8535 proven. 4187 refuted. 0 times theorem prover too weak. 4194 trivial. 0 not checked. [2022-04-06 20:56:11,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16916 backedges. 8537 proven. 4187 refuted. 0 times theorem prover too weak. 4192 trivial. 0 not checked. [2022-04-06 20:56:14,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577630165] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:14,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:14,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 167 [2022-04-06 20:56:14,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:14,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1108202552] [2022-04-06 20:56:14,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1108202552] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:14,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:14,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:56:14,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323935585] [2022-04-06 20:56:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:14,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:56:14,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:14,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:56:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12105, Invalid=15617, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 20:56:14,617 INFO L87 Difference]: Start difference. First operand 1340 states and 1572 transitions. Second operand has 58 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 57 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:17,696 INFO L93 Difference]: Finished difference Result 2402 states and 2831 transitions. [2022-04-06 20:56:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:56:17,697 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 57 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 351 [2022-04-06 20:56:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:17,699 INFO L225 Difference]: With dead ends: 2402 [2022-04-06 20:56:17,699 INFO L226 Difference]: Without dead ends: 1392 [2022-04-06 20:56:17,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14898 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=19530, Invalid=29090, Unknown=0, NotChecked=0, Total=48620 [2022-04-06 20:56:17,702 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 507 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:17,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 33 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:56:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2022-04-06 20:56:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1364. [2022-04-06 20:56:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1349 states have (on average 1.173461823573017) internal successors, (1583), 1352 states have internal predecessors, (1583), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:56:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1600 transitions. [2022-04-06 20:56:18,242 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1600 transitions. Word has length 351 [2022-04-06 20:56:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:18,242 INFO L478 AbstractCegarLoop]: Abstraction has 1364 states and 1600 transitions. [2022-04-06 20:56:18,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 57 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1600 transitions. [2022-04-06 20:56:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-04-06 20:56:18,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:18,244 INFO L499 BasicCegarLoop]: trace histogram [108, 108, 106, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:18,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:18,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:18,445 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:18,445 INFO L85 PathProgramCache]: Analyzing trace with hash -682039389, now seen corresponding path program 99 times [2022-04-06 20:56:18,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:18,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831609447] [2022-04-06 20:56:18,472 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:18,472 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:18,472 INFO L85 PathProgramCache]: Analyzing trace with hash -682039389, now seen corresponding path program 100 times [2022-04-06 20:56:18,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281369807] [2022-04-06 20:56:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:18,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:19,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:19,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:56:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:19,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-04-06 20:56:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17559 backedges. 8860 proven. 4347 refuted. 0 times theorem prover too weak. 4352 trivial. 0 not checked. [2022-04-06 20:56:19,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:19,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281369807] [2022-04-06 20:56:19,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281369807] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:19,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882420249] [2022-04-06 20:56:19,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:56:19,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:19,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:19,682 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 20:56:19,683 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 20:56:19,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:56:19,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:19,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 126 conjunts are in the unsatisfiable core [2022-04-06 20:56:19,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17559 backedges. 4187 proven. 13372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:56:28,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17559 backedges. 4189 proven. 13370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:56:38,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882420249] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:38,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:38,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 119, 116] total 288 [2022-04-06 20:56:38,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:38,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831609447] [2022-04-06 20:56:38,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831609447] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:38,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:38,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:56:38,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600076846] [2022-04-06 20:56:38,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:38,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:56:38,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:38,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:56:38,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14404, Invalid=68252, Unknown=0, NotChecked=0, Total=82656 [2022-04-06 20:56:38,949 INFO L87 Difference]: Start difference. First operand 1364 states and 1600 transitions. Second operand has 59 states, 59 states have (on average 3.169491525423729) internal successors, (187), 58 states have internal predecessors, (187), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:42,435 INFO L93 Difference]: Finished difference Result 2444 states and 2880 transitions. [2022-04-06 20:56:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:56:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.169491525423729) internal successors, (187), 58 states have internal predecessors, (187), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 357 [2022-04-06 20:56:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:42,438 INFO L225 Difference]: With dead ends: 2444 [2022-04-06 20:56:42,438 INFO L226 Difference]: Without dead ends: 1416 [2022-04-06 20:56:42,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 488 SyntacticMatches, 3 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48522 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=20620, Invalid=96686, Unknown=0, NotChecked=0, Total=117306 [2022-04-06 20:56:42,443 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 532 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:42,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 33 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:56:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-04-06 20:56:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1388. [2022-04-06 20:56:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1373 states have (on average 1.1733430444282593) internal successors, (1611), 1376 states have internal predecessors, (1611), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:56:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1628 transitions. [2022-04-06 20:56:43,049 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1628 transitions. Word has length 357 [2022-04-06 20:56:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:43,049 INFO L478 AbstractCegarLoop]: Abstraction has 1388 states and 1628 transitions. [2022-04-06 20:56:43,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.169491525423729) internal successors, (187), 58 states have internal predecessors, (187), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:43,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1628 transitions. [2022-04-06 20:56:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-04-06 20:56:43,051 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:43,051 INFO L499 BasicCegarLoop]: trace histogram [110, 110, 108, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:43,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 20:56:43,252 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,SelfDestructingSolverStorable64 [2022-04-06 20:56:43,252 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1974648247, now seen corresponding path program 101 times [2022-04-06 20:56:43,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:43,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1549660345] [2022-04-06 20:56:43,282 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:43,282 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:43,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1974648247, now seen corresponding path program 102 times [2022-04-06 20:56:43,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:43,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387123936] [2022-04-06 20:56:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:43,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:44,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:44,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:56:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:44,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-04-06 20:56:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18214 backedges. 9189 proven. 4510 refuted. 0 times theorem prover too weak. 4515 trivial. 0 not checked. [2022-04-06 20:56:44,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:44,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387123936] [2022-04-06 20:56:44,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387123936] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:44,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307988630] [2022-04-06 20:56:44,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:56:44,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:44,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:44,466 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 20:56:44,466 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 20:56:44,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:56:44,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:44,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:56:44,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18214 backedges. 165 proven. 9192 refuted. 0 times theorem prover too weak. 8857 trivial. 0 not checked. [2022-04-06 20:56:45,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18214 backedges. 7 proven. 329 refuted. 0 times theorem prover too weak. 17878 trivial. 0 not checked. [2022-04-06 20:56:46,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307988630] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:46,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:46,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 10, 8] total 72 [2022-04-06 20:56:46,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:46,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1549660345] [2022-04-06 20:56:46,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1549660345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:46,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:46,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:56:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961011156] [2022-04-06 20:56:46,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:46,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:56:46,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:56:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1815, Invalid=3297, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:56:46,675 INFO L87 Difference]: Start difference. First operand 1388 states and 1628 transitions. Second operand has 60 states, 60 states have (on average 3.1666666666666665) internal successors, (190), 59 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:48,949 INFO L93 Difference]: Finished difference Result 2486 states and 2929 transitions. [2022-04-06 20:56:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:56:48,949 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.1666666666666665) internal successors, (190), 59 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 363 [2022-04-06 20:56:48,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:48,952 INFO L225 Difference]: With dead ends: 2486 [2022-04-06 20:56:48,952 INFO L226 Difference]: Without dead ends: 1440 [2022-04-06 20:56:48,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 717 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2602 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5174, Invalid=11082, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:56:48,954 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 496 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:48,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 39 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:56:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2022-04-06 20:56:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1412. [2022-04-06 20:56:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1397 states have (on average 1.1732283464566928) internal successors, (1639), 1400 states have internal predecessors, (1639), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:56:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1656 transitions. [2022-04-06 20:56:49,551 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1656 transitions. Word has length 363 [2022-04-06 20:56:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:49,551 INFO L478 AbstractCegarLoop]: Abstraction has 1412 states and 1656 transitions. [2022-04-06 20:56:49,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.1666666666666665) internal successors, (190), 59 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1656 transitions. [2022-04-06 20:56:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-04-06 20:56:49,554 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:49,554 INFO L499 BasicCegarLoop]: trace histogram [112, 112, 110, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:49,570 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 20:56:49,755 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,SelfDestructingSolverStorable65 [2022-04-06 20:56:49,755 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:49,755 INFO L85 PathProgramCache]: Analyzing trace with hash 688959715, now seen corresponding path program 103 times [2022-04-06 20:56:49,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:49,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [828422766] [2022-04-06 20:56:49,799 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:49,799 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash 688959715, now seen corresponding path program 104 times [2022-04-06 20:56:49,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:49,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541616827] [2022-04-06 20:56:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:51,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:51,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:56:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:51,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-04-06 20:56:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18881 backedges. 9524 proven. 4676 refuted. 0 times theorem prover too weak. 4681 trivial. 0 not checked. [2022-04-06 20:56:51,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:51,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541616827] [2022-04-06 20:56:51,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541616827] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:51,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321442354] [2022-04-06 20:56:51,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:56:51,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:51,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:51,082 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 20:56:51,083 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 20:56:51,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:56:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:56:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18881 backedges. 9522 proven. 4676 refuted. 0 times theorem prover too weak. 4683 trivial. 0 not checked. [2022-04-06 20:56:53,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18881 backedges. 9524 proven. 4676 refuted. 0 times theorem prover too weak. 4681 trivial. 0 not checked. [2022-04-06 20:56:57,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321442354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:57,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:57,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 176 [2022-04-06 20:56:57,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:57,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [828422766] [2022-04-06 20:56:57,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [828422766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:57,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:57,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:56:57,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445441042] [2022-04-06 20:56:57,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:57,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:56:57,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:57,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:56:57,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13461, Invalid=17339, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 20:56:57,065 INFO L87 Difference]: Start difference. First operand 1412 states and 1656 transitions. Second operand has 61 states, 61 states have (on average 3.1639344262295084) internal successors, (193), 60 states have internal predecessors, (193), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:00,476 INFO L93 Difference]: Finished difference Result 2528 states and 2978 transitions. [2022-04-06 20:57:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:57:00,477 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.1639344262295084) internal successors, (193), 60 states have internal predecessors, (193), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 369 [2022-04-06 20:57:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:00,479 INFO L225 Difference]: With dead ends: 2528 [2022-04-06 20:57:00,479 INFO L226 Difference]: Without dead ends: 1464 [2022-04-06 20:57:00,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16581 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=21726, Invalid=32330, Unknown=0, NotChecked=0, Total=54056 [2022-04-06 20:57:00,483 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 520 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:00,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 39 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:57:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-04-06 20:57:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1436. [2022-04-06 20:57:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1421 states have (on average 1.1731175228712174) internal successors, (1667), 1424 states have internal predecessors, (1667), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:57:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1684 transitions. [2022-04-06 20:57:01,127 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1684 transitions. Word has length 369 [2022-04-06 20:57:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:01,127 INFO L478 AbstractCegarLoop]: Abstraction has 1436 states and 1684 transitions. [2022-04-06 20:57:01,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.1639344262295084) internal successors, (193), 60 states have internal predecessors, (193), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1684 transitions. [2022-04-06 20:57:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-04-06 20:57:01,130 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:01,130 INFO L499 BasicCegarLoop]: trace histogram [114, 114, 112, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:01,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:01,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:01,330 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash -159907849, now seen corresponding path program 105 times [2022-04-06 20:57:01,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:01,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501052330] [2022-04-06 20:57:01,365 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:01,365 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:01,365 INFO L85 PathProgramCache]: Analyzing trace with hash -159907849, now seen corresponding path program 106 times [2022-04-06 20:57:01,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:01,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940834993] [2022-04-06 20:57:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:01,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:02,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:02,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:57:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:02,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-04-06 20:57:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 19560 backedges. 9865 proven. 4845 refuted. 0 times theorem prover too weak. 4850 trivial. 0 not checked. [2022-04-06 20:57:02,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:02,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940834993] [2022-04-06 20:57:02,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940834993] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:02,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571392862] [2022-04-06 20:57:02,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:57:02,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:02,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:02,836 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 20:57:02,836 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 20:57:02,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:57:02,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:02,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 132 conjunts are in the unsatisfiable core [2022-04-06 20:57:02,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 19560 backedges. 4676 proven. 14884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:57:11,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 19560 backedges. 4678 proven. 14882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:57:23,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571392862] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:23,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:23,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 125, 122] total 303 [2022-04-06 20:57:23,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:23,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1501052330] [2022-04-06 20:57:23,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1501052330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:23,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:23,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:57:23,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103120434] [2022-04-06 20:57:23,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:23,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:57:23,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:23,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:57:23,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15970, Invalid=75536, Unknown=0, NotChecked=0, Total=91506 [2022-04-06 20:57:23,640 INFO L87 Difference]: Start difference. First operand 1436 states and 1684 transitions. Second operand has 62 states, 62 states have (on average 3.161290322580645) internal successors, (196), 61 states have internal predecessors, (196), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:27,426 INFO L93 Difference]: Finished difference Result 2570 states and 3027 transitions. [2022-04-06 20:57:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:57:27,427 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.161290322580645) internal successors, (196), 61 states have internal predecessors, (196), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 375 [2022-04-06 20:57:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:27,429 INFO L225 Difference]: With dead ends: 2570 [2022-04-06 20:57:27,429 INFO L226 Difference]: Without dead ends: 1488 [2022-04-06 20:57:27,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 512 SyntacticMatches, 3 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53778 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=22873, Invalid=107087, Unknown=0, NotChecked=0, Total=129960 [2022-04-06 20:57:27,437 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 508 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:27,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 35 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:57:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-04-06 20:57:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1460. [2022-04-06 20:57:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1445 states have (on average 1.1730103806228374) internal successors, (1695), 1448 states have internal predecessors, (1695), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:57:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 1712 transitions. [2022-04-06 20:57:28,318 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 1712 transitions. Word has length 375 [2022-04-06 20:57:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:28,319 INFO L478 AbstractCegarLoop]: Abstraction has 1460 states and 1712 transitions. [2022-04-06 20:57:28,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.161290322580645) internal successors, (196), 61 states have internal predecessors, (196), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 1712 transitions. [2022-04-06 20:57:28,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-04-06 20:57:28,321 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:28,321 INFO L499 BasicCegarLoop]: trace histogram [116, 116, 114, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:28,337 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 20:57:28,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:28,522 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1714603485, now seen corresponding path program 107 times [2022-04-06 20:57:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:28,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1751312482] [2022-04-06 20:57:28,557 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:28,558 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1714603485, now seen corresponding path program 108 times [2022-04-06 20:57:28,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:28,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598857348] [2022-04-06 20:57:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:29,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:29,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:57:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:29,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-04-06 20:57:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20251 backedges. 10212 proven. 5017 refuted. 0 times theorem prover too weak. 5022 trivial. 0 not checked. [2022-04-06 20:57:29,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:29,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598857348] [2022-04-06 20:57:29,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598857348] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:29,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907446067] [2022-04-06 20:57:29,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:57:29,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:29,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:29,895 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 20:57:29,898 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 20:57:29,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:57:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:57:29,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20251 backedges. 174 proven. 10215 refuted. 0 times theorem prover too weak. 9862 trivial. 0 not checked. [2022-04-06 20:57:31,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20251 backedges. 7 proven. 347 refuted. 0 times theorem prover too weak. 19897 trivial. 0 not checked. [2022-04-06 20:57:32,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907446067] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:32,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:32,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 10, 8] total 75 [2022-04-06 20:57:32,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:32,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1751312482] [2022-04-06 20:57:32,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1751312482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:32,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:32,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:57:32,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531417317] [2022-04-06 20:57:32,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:32,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:57:32,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:32,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:57:32,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1998, Invalid=3552, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:57:32,223 INFO L87 Difference]: Start difference. First operand 1460 states and 1712 transitions. Second operand has 63 states, 63 states have (on average 3.1587301587301586) internal successors, (199), 62 states have internal predecessors, (199), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:34,727 INFO L93 Difference]: Finished difference Result 2612 states and 3076 transitions. [2022-04-06 20:57:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:57:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.1587301587301586) internal successors, (199), 62 states have internal predecessors, (199), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 381 [2022-04-06 20:57:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:34,730 INFO L225 Difference]: With dead ends: 2612 [2022-04-06 20:57:34,730 INFO L226 Difference]: Without dead ends: 1512 [2022-04-06 20:57:34,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 753 SyntacticMatches, 3 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2827 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5714, Invalid=12108, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 20:57:34,732 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 525 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:34,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 33 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:57:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2022-04-06 20:57:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1484. [2022-04-06 20:57:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1469 states have (on average 1.1729067392784207) internal successors, (1723), 1472 states have internal predecessors, (1723), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:57:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 1740 transitions. [2022-04-06 20:57:35,451 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 1740 transitions. Word has length 381 [2022-04-06 20:57:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:35,452 INFO L478 AbstractCegarLoop]: Abstraction has 1484 states and 1740 transitions. [2022-04-06 20:57:35,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.1587301587301586) internal successors, (199), 62 states have internal predecessors, (199), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 1740 transitions. [2022-04-06 20:57:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-04-06 20:57:35,454 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:35,454 INFO L499 BasicCegarLoop]: trace histogram [118, 118, 116, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:35,469 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 20:57:35,654 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,SelfDestructingSolverStorable68 [2022-04-06 20:57:35,654 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:35,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:35,655 INFO L85 PathProgramCache]: Analyzing trace with hash 255803959, now seen corresponding path program 109 times [2022-04-06 20:57:35,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:35,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1653039128] [2022-04-06 20:57:35,687 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:35,687 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash 255803959, now seen corresponding path program 110 times [2022-04-06 20:57:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:35,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27669459] [2022-04-06 20:57:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:37,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:37,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:57:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:37,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-04-06 20:57:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20954 backedges. 10565 proven. 5192 refuted. 0 times theorem prover too weak. 5197 trivial. 0 not checked. [2022-04-06 20:57:37,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:37,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27669459] [2022-04-06 20:57:37,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27669459] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:37,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335870317] [2022-04-06 20:57:37,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:57:37,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:37,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:37,123 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 20:57:37,124 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 20:57:37,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:57:37,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:37,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:57:37,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20954 backedges. 10563 proven. 5192 refuted. 0 times theorem prover too weak. 5199 trivial. 0 not checked. [2022-04-06 20:57:39,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20954 backedges. 10565 proven. 5192 refuted. 0 times theorem prover too weak. 5197 trivial. 0 not checked. [2022-04-06 20:57:43,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335870317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:43,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:43,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 185 [2022-04-06 20:57:43,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:43,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1653039128] [2022-04-06 20:57:43,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1653039128] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:43,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:43,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:57:43,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077512195] [2022-04-06 20:57:43,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:43,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:57:43,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:57:43,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14889, Invalid=19151, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 20:57:43,593 INFO L87 Difference]: Start difference. First operand 1484 states and 1740 transitions. Second operand has 64 states, 64 states have (on average 3.15625) internal successors, (202), 63 states have internal predecessors, (202), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:47,356 INFO L93 Difference]: Finished difference Result 2654 states and 3125 transitions. [2022-04-06 20:57:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:57:47,357 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.15625) internal successors, (202), 63 states have internal predecessors, (202), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 387 [2022-04-06 20:57:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:47,359 INFO L225 Difference]: With dead ends: 2654 [2022-04-06 20:57:47,359 INFO L226 Difference]: Without dead ends: 1536 [2022-04-06 20:57:47,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 659 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18354 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=24039, Invalid=35741, Unknown=0, NotChecked=0, Total=59780 [2022-04-06 20:57:47,364 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 529 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:47,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 39 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:57:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2022-04-06 20:57:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1508. [2022-04-06 20:57:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1493 states have (on average 1.1728064300066978) internal successors, (1751), 1496 states have internal predecessors, (1751), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:57:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 1768 transitions. [2022-04-06 20:57:48,081 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 1768 transitions. Word has length 387 [2022-04-06 20:57:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:48,082 INFO L478 AbstractCegarLoop]: Abstraction has 1508 states and 1768 transitions. [2022-04-06 20:57:48,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.15625) internal successors, (202), 63 states have internal predecessors, (202), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 1768 transitions. [2022-04-06 20:57:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-04-06 20:57:48,084 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:48,084 INFO L499 BasicCegarLoop]: trace histogram [120, 120, 118, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:48,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-06 20:57:48,291 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,SelfDestructingSolverStorable69 [2022-04-06 20:57:48,291 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:48,292 INFO L85 PathProgramCache]: Analyzing trace with hash -814316701, now seen corresponding path program 111 times [2022-04-06 20:57:48,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:48,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1708737097] [2022-04-06 20:57:48,326 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:48,326 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash -814316701, now seen corresponding path program 112 times [2022-04-06 20:57:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482408767] [2022-04-06 20:57:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:49,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:49,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:57:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:49,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-04-06 20:57:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21669 backedges. 10924 proven. 5370 refuted. 0 times theorem prover too weak. 5375 trivial. 0 not checked. [2022-04-06 20:57:49,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:49,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482408767] [2022-04-06 20:57:49,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482408767] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:49,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811118922] [2022-04-06 20:57:49,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:57:49,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:49,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:49,755 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 20:57:49,770 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 20:57:49,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:57:49,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:49,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 138 conjunts are in the unsatisfiable core [2022-04-06 20:57:49,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21669 backedges. 5192 proven. 16477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:57:59,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21669 backedges. 5194 proven. 16475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:58:12,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811118922] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:12,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:12,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 131, 128] total 318 [2022-04-06 20:58:12,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:12,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1708737097] [2022-04-06 20:58:12,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1708737097] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:12,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:12,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:58:12,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030056116] [2022-04-06 20:58:12,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:12,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:58:12,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:12,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:58:12,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17617, Invalid=83189, Unknown=0, NotChecked=0, Total=100806 [2022-04-06 20:58:12,753 INFO L87 Difference]: Start difference. First operand 1508 states and 1768 transitions. Second operand has 65 states, 65 states have (on average 3.1538461538461537) internal successors, (205), 64 states have internal predecessors, (205), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:16,911 INFO L93 Difference]: Finished difference Result 2696 states and 3174 transitions. [2022-04-06 20:58:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:58:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.1538461538461537) internal successors, (205), 64 states have internal predecessors, (205), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 393 [2022-04-06 20:58:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:16,915 INFO L225 Difference]: With dead ends: 2696 [2022-04-06 20:58:16,915 INFO L226 Difference]: Without dead ends: 1560 [2022-04-06 20:58:16,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 536 SyntacticMatches, 3 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59304 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=25243, Invalid=118019, Unknown=0, NotChecked=0, Total=143262 [2022-04-06 20:58:16,923 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 494 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:16,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 39 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:58:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-04-06 20:58:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1532. [2022-04-06 20:58:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1517 states have (on average 1.1727092946605142) internal successors, (1779), 1520 states have internal predecessors, (1779), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:58:17,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 1796 transitions. [2022-04-06 20:58:17,768 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 1796 transitions. Word has length 393 [2022-04-06 20:58:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:17,768 INFO L478 AbstractCegarLoop]: Abstraction has 1532 states and 1796 transitions. [2022-04-06 20:58:17,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.1538461538461537) internal successors, (205), 64 states have internal predecessors, (205), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 1796 transitions. [2022-04-06 20:58:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-04-06 20:58:17,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:17,771 INFO L499 BasicCegarLoop]: trace histogram [122, 122, 120, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:17,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:58:17,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:17,971 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:17,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1224770679, now seen corresponding path program 113 times [2022-04-06 20:58:17,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:17,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713308677] [2022-04-06 20:58:18,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:18,018 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:18,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1224770679, now seen corresponding path program 114 times [2022-04-06 20:58:18,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:18,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577314693] [2022-04-06 20:58:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:18,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:19,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:19,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:58:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:19,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-04-06 20:58:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 22396 backedges. 11289 proven. 5551 refuted. 0 times theorem prover too weak. 5556 trivial. 0 not checked. [2022-04-06 20:58:19,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:19,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577314693] [2022-04-06 20:58:19,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577314693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:19,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28572559] [2022-04-06 20:58:19,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:58:19,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:19,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:19,466 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 20:58:19,466 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 20:58:19,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:58:19,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:19,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:58:19,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22396 backedges. 183 proven. 11292 refuted. 0 times theorem prover too weak. 10921 trivial. 0 not checked. [2022-04-06 20:58:20,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22396 backedges. 7 proven. 365 refuted. 0 times theorem prover too weak. 22024 trivial. 0 not checked. [2022-04-06 20:58:21,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28572559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:21,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:21,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 10, 8] total 78 [2022-04-06 20:58:21,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:21,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713308677] [2022-04-06 20:58:21,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713308677] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:21,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:21,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:58:21,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227751609] [2022-04-06 20:58:21,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:21,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:58:21,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:58:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2190, Invalid=3816, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:58:21,908 INFO L87 Difference]: Start difference. First operand 1532 states and 1796 transitions. Second operand has 66 states, 66 states have (on average 3.1515151515151514) internal successors, (208), 65 states have internal predecessors, (208), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:24,663 INFO L93 Difference]: Finished difference Result 2738 states and 3223 transitions. [2022-04-06 20:58:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:58:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.1515151515151514) internal successors, (208), 65 states have internal predecessors, (208), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 399 [2022-04-06 20:58:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:24,666 INFO L225 Difference]: With dead ends: 2738 [2022-04-06 20:58:24,666 INFO L226 Difference]: Without dead ends: 1584 [2022-04-06 20:58:24,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 789 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6281, Invalid=13179, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 20:58:24,668 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 548 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:24,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 31 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:58:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2022-04-06 20:58:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1556. [2022-04-06 20:58:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1541 states have (on average 1.172615184944841) internal successors, (1807), 1544 states have internal predecessors, (1807), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:58:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 1824 transitions. [2022-04-06 20:58:25,399 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 1824 transitions. Word has length 399 [2022-04-06 20:58:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:25,399 INFO L478 AbstractCegarLoop]: Abstraction has 1556 states and 1824 transitions. [2022-04-06 20:58:25,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.1515151515151514) internal successors, (208), 65 states have internal predecessors, (208), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 1824 transitions. [2022-04-06 20:58:25,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-04-06 20:58:25,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:25,402 INFO L499 BasicCegarLoop]: trace histogram [124, 124, 122, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:25,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 20:58:25,602 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,SelfDestructingSolverStorable71 [2022-04-06 20:58:25,603 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:25,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1844743331, now seen corresponding path program 115 times [2022-04-06 20:58:25,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:25,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831707774] [2022-04-06 20:58:25,636 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:25,636 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1844743331, now seen corresponding path program 116 times [2022-04-06 20:58:25,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:25,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010006691] [2022-04-06 20:58:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:25,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:27,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:27,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:58:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:27,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-04-06 20:58:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 23135 backedges. 11660 proven. 5735 refuted. 0 times theorem prover too weak. 5740 trivial. 0 not checked. [2022-04-06 20:58:27,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:27,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010006691] [2022-04-06 20:58:27,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010006691] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:27,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850199634] [2022-04-06 20:58:27,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:58:27,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:27,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:27,141 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 20:58:27,143 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 20:58:27,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:58:27,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:58:27,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 23135 backedges. 11658 proven. 5735 refuted. 0 times theorem prover too weak. 5742 trivial. 0 not checked. [2022-04-06 20:58:29,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 23135 backedges. 11660 proven. 5735 refuted. 0 times theorem prover too weak. 5740 trivial. 0 not checked. [2022-04-06 20:58:34,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850199634] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:34,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:34,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 194 [2022-04-06 20:58:34,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:34,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831707774] [2022-04-06 20:58:34,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831707774] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:34,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:34,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:58:34,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121457351] [2022-04-06 20:58:34,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:34,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:58:34,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:34,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:58:34,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16389, Invalid=21053, Unknown=0, NotChecked=0, Total=37442 [2022-04-06 20:58:34,179 INFO L87 Difference]: Start difference. First operand 1556 states and 1824 transitions. Second operand has 67 states, 67 states have (on average 3.1492537313432836) internal successors, (211), 66 states have internal predecessors, (211), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:38,335 INFO L93 Difference]: Finished difference Result 2780 states and 3272 transitions. [2022-04-06 20:58:38,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:58:38,335 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.1492537313432836) internal successors, (211), 66 states have internal predecessors, (211), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 405 [2022-04-06 20:58:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:38,338 INFO L225 Difference]: With dead ends: 2780 [2022-04-06 20:58:38,338 INFO L226 Difference]: Without dead ends: 1608 [2022-04-06 20:58:38,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20217 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=26469, Invalid=39323, Unknown=0, NotChecked=0, Total=65792 [2022-04-06 20:58:38,343 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 540 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:38,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 39 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:58:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-04-06 20:58:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1580. [2022-04-06 20:58:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1565 states have (on average 1.1725239616613419) internal successors, (1835), 1568 states have internal predecessors, (1835), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:58:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 1852 transitions. [2022-04-06 20:58:39,176 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 1852 transitions. Word has length 405 [2022-04-06 20:58:39,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:39,176 INFO L478 AbstractCegarLoop]: Abstraction has 1580 states and 1852 transitions. [2022-04-06 20:58:39,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.1492537313432836) internal successors, (211), 66 states have internal predecessors, (211), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 1852 transitions. [2022-04-06 20:58:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-04-06 20:58:39,178 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:39,178 INFO L499 BasicCegarLoop]: trace histogram [126, 126, 124, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:39,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 20:58:39,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:39,379 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:39,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:39,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1632385353, now seen corresponding path program 117 times [2022-04-06 20:58:39,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:39,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [290836947] [2022-04-06 20:58:39,420 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:39,420 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1632385353, now seen corresponding path program 118 times [2022-04-06 20:58:39,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:39,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326641510] [2022-04-06 20:58:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:39,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:41,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:41,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:58:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:41,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-04-06 20:58:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23886 backedges. 12037 proven. 5922 refuted. 0 times theorem prover too weak. 5927 trivial. 0 not checked. [2022-04-06 20:58:41,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326641510] [2022-04-06 20:58:41,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326641510] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452203538] [2022-04-06 20:58:41,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:58:41,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:41,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:41,038 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 20:58:41,039 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 20:58:41,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:58:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:41,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 144 conjunts are in the unsatisfiable core [2022-04-06 20:58:41,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 23886 backedges. 5735 proven. 18151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:58:51,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 23886 backedges. 5737 proven. 18149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:59:05,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452203538] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:05,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:05,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 137, 134] total 333 [2022-04-06 20:59:05,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:05,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [290836947] [2022-04-06 20:59:05,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [290836947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:05,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:05,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:59:05,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923065090] [2022-04-06 20:59:05,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:05,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:59:05,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:59:05,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19345, Invalid=91211, Unknown=0, NotChecked=0, Total=110556 [2022-04-06 20:59:05,525 INFO L87 Difference]: Start difference. First operand 1580 states and 1852 transitions. Second operand has 68 states, 68 states have (on average 3.1470588235294117) internal successors, (214), 67 states have internal predecessors, (214), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:09,929 INFO L93 Difference]: Finished difference Result 2822 states and 3321 transitions. [2022-04-06 20:59:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:59:09,930 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.1470588235294117) internal successors, (214), 67 states have internal predecessors, (214), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 411 [2022-04-06 20:59:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:09,932 INFO L225 Difference]: With dead ends: 2822 [2022-04-06 20:59:09,932 INFO L226 Difference]: Without dead ends: 1632 [2022-04-06 20:59:09,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 560 SyntacticMatches, 3 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65100 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=27730, Invalid=129482, Unknown=0, NotChecked=0, Total=157212 [2022-04-06 20:59:09,940 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 621 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:09,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 31 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-04-06 20:59:10,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1604. [2022-04-06 20:59:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1589 states have (on average 1.172435494021397) internal successors, (1863), 1592 states have internal predecessors, (1863), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:59:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 1880 transitions. [2022-04-06 20:59:10,759 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 1880 transitions. Word has length 411 [2022-04-06 20:59:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:10,759 INFO L478 AbstractCegarLoop]: Abstraction has 1604 states and 1880 transitions. [2022-04-06 20:59:10,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.1470588235294117) internal successors, (214), 67 states have internal predecessors, (214), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 1880 transitions. [2022-04-06 20:59:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-04-06 20:59:10,762 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:10,763 INFO L499 BasicCegarLoop]: trace histogram [128, 128, 126, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:10,780 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 20:59:10,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:10,964 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:10,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1758505501, now seen corresponding path program 119 times [2022-04-06 20:59:10,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:10,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1733297805] [2022-04-06 20:59:11,002 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:11,002 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:11,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1758505501, now seen corresponding path program 120 times [2022-04-06 20:59:11,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:11,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668812531] [2022-04-06 20:59:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:11,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:12,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:12,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:59:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:12,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-04-06 20:59:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24649 backedges. 12420 proven. 6112 refuted. 0 times theorem prover too weak. 6117 trivial. 0 not checked. [2022-04-06 20:59:12,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:12,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668812531] [2022-04-06 20:59:12,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668812531] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:12,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365148812] [2022-04-06 20:59:12,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:12,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:12,629 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 20:59:12,630 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 20:59:12,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:59:12,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:12,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:59:12,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24649 backedges. 192 proven. 12423 refuted. 0 times theorem prover too weak. 12034 trivial. 0 not checked. [2022-04-06 20:59:14,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24649 backedges. 7 proven. 383 refuted. 0 times theorem prover too weak. 24259 trivial. 0 not checked. [2022-04-06 20:59:15,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365148812] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:15,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:15,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 10, 8] total 81 [2022-04-06 20:59:15,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1733297805] [2022-04-06 20:59:15,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1733297805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:15,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:15,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:59:15,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297680624] [2022-04-06 20:59:15,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:15,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:59:15,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:15,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:59:15,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2391, Invalid=4089, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:59:15,072 INFO L87 Difference]: Start difference. First operand 1604 states and 1880 transitions. Second operand has 69 states, 69 states have (on average 3.1449275362318843) internal successors, (217), 68 states have internal predecessors, (217), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:18,023 INFO L93 Difference]: Finished difference Result 2864 states and 3370 transitions. [2022-04-06 20:59:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:59:18,023 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.1449275362318843) internal successors, (217), 68 states have internal predecessors, (217), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 417 [2022-04-06 20:59:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:18,025 INFO L225 Difference]: With dead ends: 2864 [2022-04-06 20:59:18,025 INFO L226 Difference]: Without dead ends: 1656 [2022-04-06 20:59:18,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 825 SyntacticMatches, 3 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3304 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6875, Invalid=14295, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 20:59:18,028 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 595 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:18,028 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 35 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:59:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2022-04-06 20:59:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1628. [2022-04-06 20:59:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1613 states have (on average 1.1723496590204587) internal successors, (1891), 1616 states have internal predecessors, (1891), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:59:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 1908 transitions. [2022-04-06 20:59:18,833 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 1908 transitions. Word has length 417 [2022-04-06 20:59:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:18,833 INFO L478 AbstractCegarLoop]: Abstraction has 1628 states and 1908 transitions. [2022-04-06 20:59:18,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.1449275362318843) internal successors, (217), 68 states have internal predecessors, (217), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 1908 transitions. [2022-04-06 20:59:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-04-06 20:59:18,837 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:18,837 INFO L499 BasicCegarLoop]: trace histogram [130, 130, 128, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:18,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:19,051 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,SelfDestructingSolverStorable74 [2022-04-06 20:59:19,051 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash -45020937, now seen corresponding path program 121 times [2022-04-06 20:59:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:19,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1326624334] [2022-04-06 20:59:19,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:19,089 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:19,089 INFO L85 PathProgramCache]: Analyzing trace with hash -45020937, now seen corresponding path program 122 times [2022-04-06 20:59:19,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:19,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598536476] [2022-04-06 20:59:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:19,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:20,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:20,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:59:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:20,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-04-06 20:59:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25424 backedges. 12809 proven. 6305 refuted. 0 times theorem prover too weak. 6310 trivial. 0 not checked. [2022-04-06 20:59:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:20,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598536476] [2022-04-06 20:59:20,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598536476] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:20,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135545993] [2022-04-06 20:59:20,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:20,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:20,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:20,672 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 20:59:20,673 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 20:59:20,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:20,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 20:59:20,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25424 backedges. 12807 proven. 6305 refuted. 0 times theorem prover too weak. 6312 trivial. 0 not checked. [2022-04-06 20:59:23,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25424 backedges. 12809 proven. 6305 refuted. 0 times theorem prover too weak. 6310 trivial. 0 not checked. [2022-04-06 20:59:28,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135545993] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:28,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:28,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 203 [2022-04-06 20:59:28,236 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:28,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1326624334] [2022-04-06 20:59:28,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1326624334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:28,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:28,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:59:28,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039874922] [2022-04-06 20:59:28,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:28,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:59:28,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:28,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:59:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17961, Invalid=23045, Unknown=0, NotChecked=0, Total=41006 [2022-04-06 20:59:28,241 INFO L87 Difference]: Start difference. First operand 1628 states and 1908 transitions. Second operand has 70 states, 70 states have (on average 3.142857142857143) internal successors, (220), 69 states have internal predecessors, (220), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:32,615 INFO L93 Difference]: Finished difference Result 2906 states and 3419 transitions. [2022-04-06 20:59:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:59:32,615 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.142857142857143) internal successors, (220), 69 states have internal predecessors, (220), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 423 [2022-04-06 20:59:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:32,617 INFO L225 Difference]: With dead ends: 2906 [2022-04-06 20:59:32,617 INFO L226 Difference]: Without dead ends: 1680 [2022-04-06 20:59:32,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22170 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=29016, Invalid=43076, Unknown=0, NotChecked=0, Total=72092 [2022-04-06 20:59:32,622 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 617 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:32,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 29 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:59:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2022-04-06 20:59:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1652. [2022-04-06 20:59:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1637 states have (on average 1.1722663408674405) internal successors, (1919), 1640 states have internal predecessors, (1919), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:59:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 1936 transitions. [2022-04-06 20:59:33,398 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 1936 transitions. Word has length 423 [2022-04-06 20:59:33,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:33,398 INFO L478 AbstractCegarLoop]: Abstraction has 1652 states and 1936 transitions. [2022-04-06 20:59:33,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.142857142857143) internal successors, (220), 69 states have internal predecessors, (220), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 1936 transitions. [2022-04-06 20:59:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-04-06 20:59:33,400 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:33,401 INFO L499 BasicCegarLoop]: trace histogram [132, 132, 130, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:33,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 20:59:33,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:33,601 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1796136739, now seen corresponding path program 123 times [2022-04-06 20:59:33,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:33,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1120954592] [2022-04-06 20:59:33,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:33,644 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1796136739, now seen corresponding path program 124 times [2022-04-06 20:59:33,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:33,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165230710] [2022-04-06 20:59:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:33,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:35,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:35,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 20:59:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2022-04-06 20:59:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26211 backedges. 13204 proven. 6501 refuted. 0 times theorem prover too weak. 6506 trivial. 0 not checked. [2022-04-06 20:59:35,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:35,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165230710] [2022-04-06 20:59:35,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165230710] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:35,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578517852] [2022-04-06 20:59:35,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:35,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:35,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:35,286 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 20:59:35,287 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 20:59:35,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:35,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:35,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 150 conjunts are in the unsatisfiable core [2022-04-06 20:59:35,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 26211 backedges. 6305 proven. 19906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:59:46,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 26211 backedges. 6307 proven. 19904 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:00:01,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578517852] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:01,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:01,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 143, 140] total 348 [2022-04-06 21:00:01,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:01,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1120954592] [2022-04-06 21:00:01,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1120954592] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:01,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:01,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 21:00:01,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078066856] [2022-04-06 21:00:01,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:01,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 21:00:01,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:01,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 21:00:01,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21154, Invalid=99602, Unknown=0, NotChecked=0, Total=120756 [2022-04-06 21:00:01,272 INFO L87 Difference]: Start difference. First operand 1652 states and 1936 transitions. Second operand has 71 states, 71 states have (on average 3.140845070422535) internal successors, (223), 70 states have internal predecessors, (223), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:00:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:06,067 INFO L93 Difference]: Finished difference Result 2948 states and 3468 transitions. [2022-04-06 21:00:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 21:00:06,067 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.140845070422535) internal successors, (223), 70 states have internal predecessors, (223), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 429 [2022-04-06 21:00:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:06,070 INFO L225 Difference]: With dead ends: 2948 [2022-04-06 21:00:06,070 INFO L226 Difference]: Without dead ends: 1704 [2022-04-06 21:00:06,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 584 SyntacticMatches, 3 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71166 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=30334, Invalid=141476, Unknown=0, NotChecked=0, Total=171810 [2022-04-06 21:00:06,081 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 687 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:06,081 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 37 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:00:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-04-06 21:00:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1676. [2022-04-06 21:00:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1661 states have (on average 1.1721854304635762) internal successors, (1947), 1664 states have internal predecessors, (1947), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:00:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 1964 transitions. [2022-04-06 21:00:06,987 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 1964 transitions. Word has length 429 [2022-04-06 21:00:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:06,987 INFO L478 AbstractCegarLoop]: Abstraction has 1676 states and 1964 transitions. [2022-04-06 21:00:06,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.140845070422535) internal successors, (223), 70 states have internal predecessors, (223), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:00:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 1964 transitions. [2022-04-06 21:00:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-04-06 21:00:06,989 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:06,989 INFO L499 BasicCegarLoop]: trace histogram [134, 134, 132, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:07,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-04-06 21:00:07,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:07,190 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:07,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1009759433, now seen corresponding path program 125 times [2022-04-06 21:00:07,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:07,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [470496438] [2022-04-06 21:00:07,232 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:07,232 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1009759433, now seen corresponding path program 126 times [2022-04-06 21:00:07,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:07,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364615109] [2022-04-06 21:00:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:08,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:08,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:00:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:08,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-04-06 21:00:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 27010 backedges. 13605 proven. 6700 refuted. 0 times theorem prover too weak. 6705 trivial. 0 not checked. [2022-04-06 21:00:08,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:08,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364615109] [2022-04-06 21:00:08,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364615109] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:08,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825425039] [2022-04-06 21:00:08,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:08,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:08,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:08,992 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 21:00:08,993 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 21:00:09,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:00:09,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:09,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:00:09,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 27010 backedges. 201 proven. 13608 refuted. 0 times theorem prover too weak. 13201 trivial. 0 not checked. [2022-04-06 21:00:10,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 27010 backedges. 7 proven. 401 refuted. 0 times theorem prover too weak. 26602 trivial. 0 not checked. [2022-04-06 21:00:11,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825425039] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:11,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:11,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 10, 8] total 84 [2022-04-06 21:00:11,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:11,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [470496438] [2022-04-06 21:00:11,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [470496438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:11,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:11,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 21:00:11,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662858341] [2022-04-06 21:00:11,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:11,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 21:00:11,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:11,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 21:00:11,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2601, Invalid=4371, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 21:00:11,524 INFO L87 Difference]: Start difference. First operand 1676 states and 1964 transitions. Second operand has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 71 states have internal predecessors, (226), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:00:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:14,707 INFO L93 Difference]: Finished difference Result 2990 states and 3517 transitions. [2022-04-06 21:00:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 21:00:14,708 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 71 states have internal predecessors, (226), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 435 [2022-04-06 21:00:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:14,710 INFO L225 Difference]: With dead ends: 2990 [2022-04-06 21:00:14,710 INFO L226 Difference]: Without dead ends: 1728 [2022-04-06 21:00:14,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 861 SyntacticMatches, 3 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3556 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7496, Invalid=15456, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 21:00:14,712 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 631 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:14,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 31 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:00:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2022-04-06 21:00:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1700. [2022-04-06 21:00:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1685 states have (on average 1.172106824925816) internal successors, (1975), 1688 states have internal predecessors, (1975), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:00:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 1992 transitions. [2022-04-06 21:00:15,531 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 1992 transitions. Word has length 435 [2022-04-06 21:00:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:15,532 INFO L478 AbstractCegarLoop]: Abstraction has 1700 states and 1992 transitions. [2022-04-06 21:00:15,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 71 states have internal predecessors, (226), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:00:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 1992 transitions. [2022-04-06 21:00:15,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-04-06 21:00:15,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:15,534 INFO L499 BasicCegarLoop]: trace histogram [136, 136, 134, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:15,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 21:00:15,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:15,735 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2021971869, now seen corresponding path program 127 times [2022-04-06 21:00:15,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1244750123] [2022-04-06 21:00:15,787 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:15,787 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:15,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2021971869, now seen corresponding path program 128 times [2022-04-06 21:00:15,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:15,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626306570] [2022-04-06 21:00:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:15,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:17,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:17,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:00:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:17,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2022-04-06 21:00:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 27821 backedges. 14012 proven. 6902 refuted. 0 times theorem prover too weak. 6907 trivial. 0 not checked. [2022-04-06 21:00:17,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:17,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626306570] [2022-04-06 21:00:17,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626306570] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:17,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875088208] [2022-04-06 21:00:17,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:17,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:17,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:17,535 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 21:00:17,536 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 21:00:17,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:17,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:17,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 21:00:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27821 backedges. 14010 proven. 6902 refuted. 0 times theorem prover too weak. 6909 trivial. 0 not checked. [2022-04-06 21:00:20,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 27821 backedges. 14012 proven. 6902 refuted. 0 times theorem prover too weak. 6907 trivial. 0 not checked. [2022-04-06 21:00:25,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875088208] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:25,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:25,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 212 [2022-04-06 21:00:25,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:25,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1244750123] [2022-04-06 21:00:25,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1244750123] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:25,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:25,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 21:00:25,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717749002] [2022-04-06 21:00:25,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:25,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 21:00:25,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 21:00:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19605, Invalid=25127, Unknown=0, NotChecked=0, Total=44732 [2022-04-06 21:00:25,528 INFO L87 Difference]: Start difference. First operand 1700 states and 1992 transitions. Second operand has 73 states, 73 states have (on average 3.136986301369863) internal successors, (229), 72 states have internal predecessors, (229), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:00:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:30,283 INFO L93 Difference]: Finished difference Result 3032 states and 3566 transitions. [2022-04-06 21:00:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 21:00:30,283 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.136986301369863) internal successors, (229), 72 states have internal predecessors, (229), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 441 [2022-04-06 21:00:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:30,285 INFO L225 Difference]: With dead ends: 3032 [2022-04-06 21:00:30,285 INFO L226 Difference]: Without dead ends: 1752 [2022-04-06 21:00:30,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 749 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24213 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=31680, Invalid=47000, Unknown=0, NotChecked=0, Total=78680 [2022-04-06 21:00:30,289 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 673 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:30,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 31 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:00:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-04-06 21:00:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1724. [2022-04-06 21:00:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1709 states have (on average 1.1720304271503803) internal successors, (2003), 1712 states have internal predecessors, (2003), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:00:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2020 transitions. [2022-04-06 21:00:31,144 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2020 transitions. Word has length 441 [2022-04-06 21:00:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:31,145 INFO L478 AbstractCegarLoop]: Abstraction has 1724 states and 2020 transitions. [2022-04-06 21:00:31,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.136986301369863) internal successors, (229), 72 states have internal predecessors, (229), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:00:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2020 transitions. [2022-04-06 21:00:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-04-06 21:00:31,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:31,147 INFO L499 BasicCegarLoop]: trace histogram [138, 138, 136, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:31,164 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 21:00:31,348 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,SelfDestructingSolverStorable78 [2022-04-06 21:00:31,348 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:31,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1126796663, now seen corresponding path program 129 times [2022-04-06 21:00:31,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:31,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1184059775] [2022-04-06 21:00:31,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:31,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:31,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1126796663, now seen corresponding path program 130 times [2022-04-06 21:00:31,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:31,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067316047] [2022-04-06 21:00:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:31,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:33,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:33,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:00:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:33,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2022-04-06 21:00:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 28644 backedges. 14425 proven. 7107 refuted. 0 times theorem prover too weak. 7112 trivial. 0 not checked. [2022-04-06 21:00:33,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:33,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067316047] [2022-04-06 21:00:33,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067316047] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:33,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536235942] [2022-04-06 21:00:33,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:33,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:33,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:33,172 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 21:00:33,173 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 21:00:33,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:33,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:33,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 156 conjunts are in the unsatisfiable core [2022-04-06 21:00:33,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 28644 backedges. 6902 proven. 21742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:00:45,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 28644 backedges. 6904 proven. 21740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:01,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536235942] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:01,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:01,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 149, 146] total 363 [2022-04-06 21:01:01,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:01,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1184059775] [2022-04-06 21:01:01,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1184059775] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:01,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:01,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 21:01:01,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49331429] [2022-04-06 21:01:01,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:01,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 21:01:01,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:01,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 21:01:01,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23044, Invalid=108362, Unknown=0, NotChecked=0, Total=131406 [2022-04-06 21:01:01,309 INFO L87 Difference]: Start difference. First operand 1724 states and 2020 transitions. Second operand has 74 states, 74 states have (on average 3.135135135135135) internal successors, (232), 73 states have internal predecessors, (232), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:01:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:06,638 INFO L93 Difference]: Finished difference Result 3074 states and 3615 transitions. [2022-04-06 21:01:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 21:01:06,639 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.135135135135135) internal successors, (232), 73 states have internal predecessors, (232), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 447 [2022-04-06 21:01:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:06,640 INFO L225 Difference]: With dead ends: 3074 [2022-04-06 21:01:06,640 INFO L226 Difference]: Without dead ends: 1776 [2022-04-06 21:01:06,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 608 SyntacticMatches, 3 SemanticMatches, 431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77502 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=33055, Invalid=154001, Unknown=0, NotChecked=0, Total=187056 [2022-04-06 21:01:06,649 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 692 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:06,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 35 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:01:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-04-06 21:01:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1748. [2022-04-06 21:01:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1733 states have (on average 1.1719561454125793) internal successors, (2031), 1736 states have internal predecessors, (2031), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:01:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2048 transitions. [2022-04-06 21:01:07,542 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2048 transitions. Word has length 447 [2022-04-06 21:01:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:07,543 INFO L478 AbstractCegarLoop]: Abstraction has 1748 states and 2048 transitions. [2022-04-06 21:01:07,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.135135135135135) internal successors, (232), 73 states have internal predecessors, (232), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:01:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2048 transitions. [2022-04-06 21:01:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-04-06 21:01:07,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:07,546 INFO L499 BasicCegarLoop]: trace histogram [140, 140, 138, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:07,562 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 21:01:07,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:07,746 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:07,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:07,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2007223901, now seen corresponding path program 131 times [2022-04-06 21:01:07,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:07,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390418805] [2022-04-06 21:01:07,816 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:07,816 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:07,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2007223901, now seen corresponding path program 132 times [2022-04-06 21:01:07,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:07,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718287667] [2022-04-06 21:01:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:09,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:09,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:01:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:09,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2022-04-06 21:01:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 29479 backedges. 14844 proven. 7315 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2022-04-06 21:01:09,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:09,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718287667] [2022-04-06 21:01:09,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718287667] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:09,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857210882] [2022-04-06 21:01:09,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:01:09,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:09,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:09,854 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 21:01:09,854 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 21:01:09,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:01:09,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:09,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:01:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 29479 backedges. 210 proven. 14847 refuted. 0 times theorem prover too weak. 14422 trivial. 0 not checked. [2022-04-06 21:01:11,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 29479 backedges. 7 proven. 419 refuted. 0 times theorem prover too weak. 29053 trivial. 0 not checked. [2022-04-06 21:01:12,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857210882] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:12,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:12,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 10, 8] total 87 [2022-04-06 21:01:12,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:12,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390418805] [2022-04-06 21:01:12,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390418805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:12,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:12,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 21:01:12,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651618203] [2022-04-06 21:01:12,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:12,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 21:01:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 21:01:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2820, Invalid=4662, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 21:01:12,507 INFO L87 Difference]: Start difference. First operand 1748 states and 2048 transitions. Second operand has 75 states, 75 states have (on average 3.1333333333333333) internal successors, (235), 74 states have internal predecessors, (235), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:01:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:15,901 INFO L93 Difference]: Finished difference Result 3116 states and 3664 transitions. [2022-04-06 21:01:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 21:01:15,901 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.1333333333333333) internal successors, (235), 74 states have internal predecessors, (235), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 453 [2022-04-06 21:01:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:15,903 INFO L225 Difference]: With dead ends: 3116 [2022-04-06 21:01:15,903 INFO L226 Difference]: Without dead ends: 1800 [2022-04-06 21:01:15,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 897 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3817 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=8144, Invalid=16662, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 21:01:15,906 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 629 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:15,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 33 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:01:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-04-06 21:01:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1772. [2022-04-06 21:01:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1757 states have (on average 1.1718838929994309) internal successors, (2059), 1760 states have internal predecessors, (2059), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:01:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2076 transitions. [2022-04-06 21:01:16,802 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2076 transitions. Word has length 453 [2022-04-06 21:01:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:16,802 INFO L478 AbstractCegarLoop]: Abstraction has 1772 states and 2076 transitions. [2022-04-06 21:01:16,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.1333333333333333) internal successors, (235), 74 states have internal predecessors, (235), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:01:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2076 transitions. [2022-04-06 21:01:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-04-06 21:01:16,805 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:16,805 INFO L499 BasicCegarLoop]: trace histogram [142, 142, 140, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:16,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 21:01:17,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:17,006 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1045745591, now seen corresponding path program 133 times [2022-04-06 21:01:17,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:17,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045021197] [2022-04-06 21:01:17,055 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:17,055 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1045745591, now seen corresponding path program 134 times [2022-04-06 21:01:17,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869004651] [2022-04-06 21:01:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:17,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:18,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:18,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:01:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:18,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-04-06 21:01:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30326 backedges. 15269 proven. 7526 refuted. 0 times theorem prover too weak. 7531 trivial. 0 not checked. [2022-04-06 21:01:18,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869004651] [2022-04-06 21:01:18,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869004651] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305677378] [2022-04-06 21:01:18,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:01:18,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:18,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:18,934 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 21:01:18,934 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 21:01:19,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:01:19,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:19,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 21:01:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 30326 backedges. 15267 proven. 7526 refuted. 0 times theorem prover too weak. 7533 trivial. 0 not checked. [2022-04-06 21:01:21,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:01:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30326 backedges. 15269 proven. 7526 refuted. 0 times theorem prover too weak. 7531 trivial. 0 not checked. [2022-04-06 21:01:27,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305677378] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:01:27,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:01:27,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 221 [2022-04-06 21:01:27,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:01:27,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045021197] [2022-04-06 21:01:27,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045021197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:01:27,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:01:27,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 21:01:27,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379576340] [2022-04-06 21:01:27,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:01:27,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 21:01:27,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:27,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 21:01:27,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21321, Invalid=27299, Unknown=0, NotChecked=0, Total=48620 [2022-04-06 21:01:27,610 INFO L87 Difference]: Start difference. First operand 1772 states and 2076 transitions. Second operand has 76 states, 76 states have (on average 3.1315789473684212) internal successors, (238), 75 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:01:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:32,812 INFO L93 Difference]: Finished difference Result 3158 states and 3713 transitions. [2022-04-06 21:01:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 21:01:32,813 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.1315789473684212) internal successors, (238), 75 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 459 [2022-04-06 21:01:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:32,815 INFO L225 Difference]: With dead ends: 3158 [2022-04-06 21:01:32,815 INFO L226 Difference]: Without dead ends: 1824 [2022-04-06 21:01:32,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1070 GetRequests, 779 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26346 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=34461, Invalid=51095, Unknown=0, NotChecked=0, Total=85556 [2022-04-06 21:01:32,819 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 753 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:32,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 33 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:01:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2022-04-06 21:01:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1796. [2022-04-06 21:01:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1781 states have (on average 1.171813587871982) internal successors, (2087), 1784 states have internal predecessors, (2087), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:01:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2104 transitions. [2022-04-06 21:01:33,761 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2104 transitions. Word has length 459 [2022-04-06 21:01:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:33,761 INFO L478 AbstractCegarLoop]: Abstraction has 1796 states and 2104 transitions. [2022-04-06 21:01:33,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.1315789473684212) internal successors, (238), 75 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:01:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2104 transitions. [2022-04-06 21:01:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-04-06 21:01:33,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:33,764 INFO L499 BasicCegarLoop]: trace histogram [144, 144, 142, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:33,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 21:01:33,965 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,SelfDestructingSolverStorable81 [2022-04-06 21:01:33,965 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2019951901, now seen corresponding path program 135 times [2022-04-06 21:01:33,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:33,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [74491867] [2022-04-06 21:01:34,008 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:34,008 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2019951901, now seen corresponding path program 136 times [2022-04-06 21:01:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:34,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920968066] [2022-04-06 21:01:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:34,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:35,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:01:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:35,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:01:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:35,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2022-04-06 21:01:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:01:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 31185 backedges. 15700 proven. 7740 refuted. 0 times theorem prover too weak. 7745 trivial. 0 not checked. [2022-04-06 21:01:35,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:01:35,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920968066] [2022-04-06 21:01:35,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920968066] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:01:35,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446405752] [2022-04-06 21:01:35,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:01:35,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:01:35,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:01:35,932 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 21:01:35,932 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 21:01:36,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:01:36,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:01:36,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 162 conjunts are in the unsatisfiable core [2022-04-06 21:01:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:01:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31185 backedges. 7526 proven. 23659 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:01:48,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31185 backedges. 7528 proven. 23657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:02:05,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446405752] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:05,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:05,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 155, 152] total 378 [2022-04-06 21:02:05,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:05,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [74491867] [2022-04-06 21:02:05,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [74491867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:05,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:05,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 21:02:05,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771930775] [2022-04-06 21:02:05,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:05,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 21:02:05,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:05,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 21:02:05,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25015, Invalid=117491, Unknown=0, NotChecked=0, Total=142506 [2022-04-06 21:02:05,743 INFO L87 Difference]: Start difference. First operand 1796 states and 2104 transitions. Second operand has 77 states, 77 states have (on average 3.1298701298701297) internal successors, (241), 76 states have internal predecessors, (241), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:02:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:11,385 INFO L93 Difference]: Finished difference Result 3200 states and 3762 transitions. [2022-04-06 21:02:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 21:02:11,385 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.1298701298701297) internal successors, (241), 76 states have internal predecessors, (241), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 465 [2022-04-06 21:02:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:11,387 INFO L225 Difference]: With dead ends: 3200 [2022-04-06 21:02:11,387 INFO L226 Difference]: Without dead ends: 1848 [2022-04-06 21:02:11,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1084 GetRequests, 632 SyntacticMatches, 3 SemanticMatches, 449 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84108 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=35893, Invalid=167057, Unknown=0, NotChecked=0, Total=202950 [2022-04-06 21:02:11,396 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 651 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:11,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 39 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:02:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-04-06 21:02:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1820. [2022-04-06 21:02:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1805 states have (on average 1.1717451523545706) internal successors, (2115), 1808 states have internal predecessors, (2115), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:02:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2132 transitions. [2022-04-06 21:02:12,391 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2132 transitions. Word has length 465 [2022-04-06 21:02:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:12,391 INFO L478 AbstractCegarLoop]: Abstraction has 1820 states and 2132 transitions. [2022-04-06 21:02:12,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.1298701298701297) internal successors, (241), 76 states have internal predecessors, (241), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:02:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2132 transitions. [2022-04-06 21:02:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-04-06 21:02:12,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:12,394 INFO L499 BasicCegarLoop]: trace histogram [146, 146, 144, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:12,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 21:02:12,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:12,594 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:12,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:12,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1783239159, now seen corresponding path program 137 times [2022-04-06 21:02:12,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:12,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430679770] [2022-04-06 21:02:12,662 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:12,662 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1783239159, now seen corresponding path program 138 times [2022-04-06 21:02:12,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:12,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436026602] [2022-04-06 21:02:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:14,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:14,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:02:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:14,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2022-04-06 21:02:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 32056 backedges. 16137 proven. 7957 refuted. 0 times theorem prover too weak. 7962 trivial. 0 not checked. [2022-04-06 21:02:14,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:14,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436026602] [2022-04-06 21:02:14,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436026602] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:14,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595074811] [2022-04-06 21:02:14,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:02:14,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:14,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:14,623 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 21:02:14,627 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 21:02:14,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:02:14,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:14,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:02:14,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 32056 backedges. 219 proven. 16140 refuted. 0 times theorem prover too weak. 15697 trivial. 0 not checked. [2022-04-06 21:02:16,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:02:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 32056 backedges. 7 proven. 437 refuted. 0 times theorem prover too weak. 31612 trivial. 0 not checked. [2022-04-06 21:02:17,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595074811] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:02:17,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:02:17,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 10, 8] total 90 [2022-04-06 21:02:17,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:02:17,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430679770] [2022-04-06 21:02:17,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430679770] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:02:17,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:02:17,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 21:02:17,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66109106] [2022-04-06 21:02:17,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:02:17,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 21:02:17,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:17,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 21:02:17,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3048, Invalid=4962, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 21:02:17,294 INFO L87 Difference]: Start difference. First operand 1820 states and 2132 transitions. Second operand has 78 states, 78 states have (on average 3.128205128205128) internal successors, (244), 77 states have internal predecessors, (244), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:02:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:02:20,849 INFO L93 Difference]: Finished difference Result 3242 states and 3811 transitions. [2022-04-06 21:02:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 21:02:20,849 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.128205128205128) internal successors, (244), 77 states have internal predecessors, (244), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 471 [2022-04-06 21:02:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:02:20,851 INFO L225 Difference]: With dead ends: 3242 [2022-04-06 21:02:20,851 INFO L226 Difference]: Without dead ends: 1872 [2022-04-06 21:02:20,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 933 SyntacticMatches, 3 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4087 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8819, Invalid=17913, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 21:02:20,855 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 686 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:02:20,855 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 31 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:02:20,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-04-06 21:02:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1844. [2022-04-06 21:02:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1829 states have (on average 1.1716785128485512) internal successors, (2143), 1832 states have internal predecessors, (2143), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:02:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2160 transitions. [2022-04-06 21:02:21,868 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2160 transitions. Word has length 471 [2022-04-06 21:02:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:02:21,868 INFO L478 AbstractCegarLoop]: Abstraction has 1844 states and 2160 transitions. [2022-04-06 21:02:21,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.128205128205128) internal successors, (244), 77 states have internal predecessors, (244), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:02:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2160 transitions. [2022-04-06 21:02:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-04-06 21:02:21,871 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:02:21,871 INFO L499 BasicCegarLoop]: trace histogram [148, 148, 146, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:02:21,887 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 21:02:22,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:22,072 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:02:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:02:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1659075549, now seen corresponding path program 139 times [2022-04-06 21:02:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:02:22,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094140322] [2022-04-06 21:02:22,166 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:02:22,166 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:02:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1659075549, now seen corresponding path program 140 times [2022-04-06 21:02:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:02:22,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705608798] [2022-04-06 21:02:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:02:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:02:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:24,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:02:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:24,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:02:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:24,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2022-04-06 21:02:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:02:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 32939 backedges. 16580 proven. 8177 refuted. 0 times theorem prover too weak. 8182 trivial. 0 not checked. [2022-04-06 21:02:24,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:02:24,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705608798] [2022-04-06 21:02:24,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705608798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:02:24,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139279817] [2022-04-06 21:02:24,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:02:24,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:02:24,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:02:24,203 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 21:02:24,204 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 21:02:24,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:02:24,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:02:24,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 21:02:24,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:02:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 32939 backedges. 16578 proven. 8177 refuted. 0 times theorem prover too weak. 8184 trivial. 0 not checked. [2022-04-06 21:02:27,351 INFO L328 TraceCheckSpWp]: Computing backward predicates...