/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/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:57:51,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:57:51,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:57:51,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:57:51,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:57:51,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:57:51,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:57:51,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:57:52,009 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:57:52,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:57:52,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:57:52,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:57:52,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:57:52,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:57:52,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:57:52,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:57:52,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:57:52,013 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:57:52,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:57:52,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:57:52,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:57:52,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:57:52,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:57:52,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:57:52,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:57:52,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:57:52,014 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:57:52,014 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:57:52,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:57:52,014 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:57:52,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:57:52,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:57:52,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:57:52,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:57:52,260 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:57:52,261 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:57:52,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-03-20 17:57:52,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17fcd6974/20fbedd6afa1403b8221323dd4df7c11/FLAG24724f0e4 [2022-03-20 17:57:52,735 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:57:52,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-03-20 17:57:52,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17fcd6974/20fbedd6afa1403b8221323dd4df7c11/FLAG24724f0e4 [2022-03-20 17:57:52,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17fcd6974/20fbedd6afa1403b8221323dd4df7c11 [2022-03-20 17:57:52,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:57:52,759 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:57:52,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:57:52,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:57:52,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:57:52,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:57:52" (1/1) ... [2022-03-20 17:57:52,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c0116da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52, skipping insertion in model container [2022-03-20 17:57:52,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:57:52" (1/1) ... [2022-03-20 17:57:52,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:57:52,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:57:52,928 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/vogal-2.i[808,821] [2022-03-20 17:57:52,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:57:52,952 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:57:52,963 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/vogal-2.i[808,821] [2022-03-20 17:57:52,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:57:52,983 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:57:52,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52 WrapperNode [2022-03-20 17:57:52,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:57:52,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:57:52,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:57:52,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:57:52,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52" (1/1) ... [2022-03-20 17:57:52,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52" (1/1) ... [2022-03-20 17:57:52,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52" (1/1) ... [2022-03-20 17:57:52,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52" (1/1) ... [2022-03-20 17:57:53,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52" (1/1) ... [2022-03-20 17:57:53,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52" (1/1) ... [2022-03-20 17:57:53,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52" (1/1) ... [2022-03-20 17:57:53,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:57:53,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:57:53,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:57:53,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:57:53,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52" (1/1) ... [2022-03-20 17:57:53,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:57:53,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:53,060 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) [2022-03-20 17:57:53,063 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 [2022-03-20 17:57:53,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:57:53,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:57:53,094 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:57:53,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:57:53,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:57:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:57:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:57:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 17:57:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 17:57:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:57:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:57:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:57:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 17:57:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:57:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 17:57:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:57:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:57:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:57:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:57:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:57:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:57:53,157 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:57:53,158 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:57:53,346 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:57:53,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:57:53,350 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-20 17:57:53,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:57:53 BoogieIcfgContainer [2022-03-20 17:57:53,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:57:53,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:57:53,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:57:53,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:57:53,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:57:52" (1/3) ... [2022-03-20 17:57:53,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720b2dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:57:53, skipping insertion in model container [2022-03-20 17:57:53,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:57:52" (2/3) ... [2022-03-20 17:57:53,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720b2dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:57:53, skipping insertion in model container [2022-03-20 17:57:53,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:57:53" (3/3) ... [2022-03-20 17:57:53,370 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-03-20 17:57:53,374 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:57:53,375 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:57:53,419 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:57:53,424 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 [2022-03-20 17:57:53,424 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:57:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:57:53,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 17:57:53,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:53,440 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:53,440 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:53,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-03-20 17:57:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:53,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [385778026] [2022-03-20 17:57:53,460 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:57:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 2 times [2022-03-20 17:57:53,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:53,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826183232] [2022-03-20 17:57:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:53,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:53,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:57:53,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:53,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826183232] [2022-03-20 17:57:53,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826183232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:53,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:53,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:57:53,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:53,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [385778026] [2022-03-20 17:57:53,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [385778026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:53,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:53,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:57:53,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057376563] [2022-03-20 17:57:53,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:53,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 17:57:53,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:53,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 17:57:53,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:57:53,637 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:53,699 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-03-20 17:57:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 17:57:53,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 17:57:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:53,710 INFO L225 Difference]: With dead ends: 64 [2022-03-20 17:57:53,710 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 17:57:53,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:57:53,719 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:53,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:57:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 17:57:53,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 17:57:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-20 17:57:53,758 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-03-20 17:57:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:53,758 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-20 17:57:53,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-20 17:57:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 17:57:53,760 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:53,760 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:53,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:57:53,761 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-03-20 17:57:53,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:53,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1951774781] [2022-03-20 17:57:53,765 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:57:53,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 2 times [2022-03-20 17:57:53,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:53,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954979830] [2022-03-20 17:57:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:53,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:57:53,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954979830] [2022-03-20 17:57:53,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954979830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:53,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:53,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:57:53,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:53,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1951774781] [2022-03-20 17:57:53,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1951774781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:53,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:53,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:57:53,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363128866] [2022-03-20 17:57:53,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:53,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:57:53,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:53,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:57:53,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:57:53,882 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:53,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:53,992 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-03-20 17:57:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:57:53,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 17:57:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:53,995 INFO L225 Difference]: With dead ends: 65 [2022-03-20 17:57:53,996 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 17:57:53,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:57:54,002 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:54,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:57:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 17:57:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-03-20 17:57:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-20 17:57:54,032 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-03-20 17:57:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:54,032 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-20 17:57:54,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-20 17:57:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 17:57:54,033 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:54,033 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] [2022-03-20 17:57:54,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:57:54,033 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-03-20 17:57:54,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:54,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858497003] [2022-03-20 17:57:54,044 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:54,044 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 2 times [2022-03-20 17:57:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:54,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841032788] [2022-03-20 17:57:54,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:54,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:54,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:57:54,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:54,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841032788] [2022-03-20 17:57:54,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841032788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:54,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671138732] [2022-03-20 17:57:54,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:57:54,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:54,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:54,191 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) [2022-03-20 17:57:54,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:57:54,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 17:57:54,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 17:57:54,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:57:54,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:57:54,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671138732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:54,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:57:54,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-20 17:57:54,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:54,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858497003] [2022-03-20 17:57:54,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858497003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:54,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:54,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:57:54,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855044064] [2022-03-20 17:57:54,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:54,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:57:54,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:54,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:57:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:57:54,404 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:54,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:54,447 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 17:57:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:57:54,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 17:57:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:54,450 INFO L225 Difference]: With dead ends: 54 [2022-03-20 17:57:54,450 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 17:57:54,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:57:54,457 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:54,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:57:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 17:57:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-03-20 17:57:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-03-20 17:57:54,469 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2022-03-20 17:57:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:54,470 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-03-20 17:57:54,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-03-20 17:57:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 17:57:54,471 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:54,471 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, 1, 1, 1] [2022-03-20 17:57:54,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 17:57:54,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:54,692 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 1 times [2022-03-20 17:57:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:54,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [450550286] [2022-03-20 17:57:54,695 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:54,695 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:54,695 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 2 times [2022-03-20 17:57:54,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:54,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676649986] [2022-03-20 17:57:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:54,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:54,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 17:57:54,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:54,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676649986] [2022-03-20 17:57:54,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676649986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:54,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313302442] [2022-03-20 17:57:54,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:57:54,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:54,803 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) [2022-03-20 17:57:54,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:57:54,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:57:54,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:54,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:57:54,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 17:57:54,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:57:54,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313302442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:54,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:57:54,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-20 17:57:54,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:54,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [450550286] [2022-03-20 17:57:54,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [450550286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:54,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:54,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:57:54,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877812854] [2022-03-20 17:57:54,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:54,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:57:54,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:54,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:57:54,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 17:57:54,924 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:54,960 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2022-03-20 17:57:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:57:54,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 17:57:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:54,962 INFO L225 Difference]: With dead ends: 99 [2022-03-20 17:57:54,962 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 17:57:54,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 17:57:54,963 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:54,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 85 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:57:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 17:57:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-03-20 17:57:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-03-20 17:57:54,971 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2022-03-20 17:57:54,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:54,971 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-03-20 17:57:54,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-03-20 17:57:54,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:57:54,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:54,973 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:55,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 17:57:55,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 17:57:55,192 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:55,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 1 times [2022-03-20 17:57:55,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:55,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [92304050] [2022-03-20 17:57:55,194 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:55,194 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 2 times [2022-03-20 17:57:55,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:55,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454628239] [2022-03-20 17:57:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:55,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:55,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 17:57:55,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:55,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454628239] [2022-03-20 17:57:55,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454628239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:55,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32781749] [2022-03-20 17:57:55,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:57:55,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:55,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:55,252 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) [2022-03-20 17:57:55,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 17:57:55,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:57:55,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:55,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 17:57:55,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 17:57:55,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:57:55,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32781749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:55,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:57:55,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-03-20 17:57:55,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:55,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [92304050] [2022-03-20 17:57:55,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [92304050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:55,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:55,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:57:55,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510433295] [2022-03-20 17:57:55,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:55,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:57:55,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:57:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:57:55,455 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:55,548 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-03-20 17:57:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:57:55,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 17:57:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:55,549 INFO L225 Difference]: With dead ends: 66 [2022-03-20 17:57:55,549 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 17:57:55,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:57:55,551 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:55,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 107 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:57:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 17:57:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 17:57:55,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-03-20 17:57:55,557 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2022-03-20 17:57:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:55,558 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-03-20 17:57:55,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-03-20 17:57:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:57:55,559 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:55,559 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:55,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 17:57:55,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:55,779 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 1 times [2022-03-20 17:57:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:55,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1416326912] [2022-03-20 17:57:55,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:55,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:55,782 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 2 times [2022-03-20 17:57:55,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:55,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343735911] [2022-03-20 17:57:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:55,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:55,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:57:55,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:55,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343735911] [2022-03-20 17:57:55,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343735911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:55,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828702213] [2022-03-20 17:57:55,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:57:55,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:55,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:55,848 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) [2022-03-20 17:57:55,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 17:57:55,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:57:55,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:55,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:57:55,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:56,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:57:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 17:57:56,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:57:56,203 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:57:56,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:57:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 17:57:56,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828702213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:57:56,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:57:56,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 15 [2022-03-20 17:57:56,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:56,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1416326912] [2022-03-20 17:57:56,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1416326912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:56,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:56,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:57:56,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552264035] [2022-03-20 17:57:56,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:56,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:57:56,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:56,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:57:56,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:57:56,241 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:56,349 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2022-03-20 17:57:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:57:56,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 17:57:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:56,351 INFO L225 Difference]: With dead ends: 130 [2022-03-20 17:57:56,351 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 17:57:56,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:57:56,352 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:56,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:57:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 17:57:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2022-03-20 17:57:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-03-20 17:57:56,363 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2022-03-20 17:57:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:56,363 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-03-20 17:57:56,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-03-20 17:57:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:57:56,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:56,364 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, 1, 1, 1] [2022-03-20 17:57:56,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 17:57:56,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:56,579 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:56,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:56,580 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 3 times [2022-03-20 17:57:56,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:56,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369668341] [2022-03-20 17:57:56,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:56,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:56,582 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 4 times [2022-03-20 17:57:56,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:56,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486897607] [2022-03-20 17:57:56,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:56,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:56,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:57:56,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486897607] [2022-03-20 17:57:56,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486897607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355332505] [2022-03-20 17:57:56,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:57:56,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:56,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:56,651 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) [2022-03-20 17:57:56,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 17:57:56,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:57:56,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:57:56,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:56,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:57:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 17:57:56,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:57:56,933 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:57:56,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:57:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 17:57:56,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355332505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:57:56,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:57:56,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2022-03-20 17:57:56,966 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369668341] [2022-03-20 17:57:56,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369668341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:56,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:56,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:57:56,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819944923] [2022-03-20 17:57:56,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:56,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:57:56,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:57:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:57:56,968 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:57,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:57,132 INFO L93 Difference]: Finished difference Result 157 states and 213 transitions. [2022-03-20 17:57:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:57:57,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 17:57:57,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:57,135 INFO L225 Difference]: With dead ends: 157 [2022-03-20 17:57:57,135 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 17:57:57,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:57:57,137 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 144 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:57,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 51 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:57:57,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 17:57:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 48. [2022-03-20 17:57:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-03-20 17:57:57,156 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 31 [2022-03-20 17:57:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:57,156 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-03-20 17:57:57,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:57,156 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-03-20 17:57:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:57:57,157 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:57,157 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, 1, 1] [2022-03-20 17:57:57,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 17:57:57,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:57,371 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:57,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 5 times [2022-03-20 17:57:57,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:57,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1703604807] [2022-03-20 17:57:57,374 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:57,374 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:57,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 6 times [2022-03-20 17:57:57,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:57,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402243355] [2022-03-20 17:57:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:57,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:57,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:57:57,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:57,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402243355] [2022-03-20 17:57:57,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402243355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:57,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900208186] [2022-03-20 17:57:57,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:57:57,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:57,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:57,464 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) [2022-03-20 17:57:57,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 17:57:57,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:57:57,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:57:57,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:57,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:57:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 17:57:57,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:57:57,818 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:57:57,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:57:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 17:57:57,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900208186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:57:57,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:57:57,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2022-03-20 17:57:57,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:57,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1703604807] [2022-03-20 17:57:57,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1703604807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:57,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:57,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:57:57,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57521635] [2022-03-20 17:57:57,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:57,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:57:57,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:57,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:57:57,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:57:57,852 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:58,136 INFO L93 Difference]: Finished difference Result 184 states and 251 transitions. [2022-03-20 17:57:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:57:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 17:57:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:58,137 INFO L225 Difference]: With dead ends: 184 [2022-03-20 17:57:58,137 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 17:57:58,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:57:58,138 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 192 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:58,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 63 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:57:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 17:57:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 50. [2022-03-20 17:57:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-03-20 17:57:58,151 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 33 [2022-03-20 17:57:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:58,151 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-03-20 17:57:58,151 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-03-20 17:57:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 17:57:58,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:58,152 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:58,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 17:57:58,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:58,376 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:58,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 7 times [2022-03-20 17:57:58,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:58,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1125054270] [2022-03-20 17:57:58,378 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:58,378 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:58,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 8 times [2022-03-20 17:57:58,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:58,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036594254] [2022-03-20 17:57:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:58,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:58,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:57:58,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036594254] [2022-03-20 17:57:58,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036594254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336192063] [2022-03-20 17:57:58,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:57:58,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:58,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:58,481 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) [2022-03-20 17:57:58,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 17:57:58,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:57:58,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:58,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:57:58,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:58,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:57:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 17:57:58,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:57:58,790 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:57:58,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:57:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 17:57:58,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336192063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:57:58,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:57:58,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-03-20 17:57:58,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1125054270] [2022-03-20 17:57:58,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1125054270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:58,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:58,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:57:58,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102865641] [2022-03-20 17:57:58,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:58,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:57:58,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:58,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:57:58,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:57:58,831 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:59,121 INFO L93 Difference]: Finished difference Result 211 states and 289 transitions. [2022-03-20 17:57:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:57:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 17:57:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:59,123 INFO L225 Difference]: With dead ends: 211 [2022-03-20 17:57:59,123 INFO L226 Difference]: Without dead ends: 176 [2022-03-20 17:57:59,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:57:59,124 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 255 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:59,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 70 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:57:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-20 17:57:59,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 52. [2022-03-20 17:57:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-03-20 17:57:59,137 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 35 [2022-03-20 17:57:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:59,137 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-03-20 17:57:59,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-03-20 17:57:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:57:59,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:59,138 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:59,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 17:57:59,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:59,363 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 9 times [2022-03-20 17:57:59,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:59,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306262277] [2022-03-20 17:57:59,365 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:59,366 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:59,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 10 times [2022-03-20 17:57:59,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:59,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193568533] [2022-03-20 17:57:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:59,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:59,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:57:59,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193568533] [2022-03-20 17:57:59,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193568533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967289263] [2022-03-20 17:57:59,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:57:59,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:59,468 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) [2022-03-20 17:57:59,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 17:57:59,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:57:59,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:59,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:57:59,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:59,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:57:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:57:59,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:57:59,800 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:57:59,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:57:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:57:59,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967289263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:57:59,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:57:59,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-03-20 17:57:59,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:59,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306262277] [2022-03-20 17:57:59,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306262277] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:59,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:59,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:57:59,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999409317] [2022-03-20 17:57:59,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:59,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:57:59,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:59,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:57:59,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:57:59,837 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:00,276 INFO L93 Difference]: Finished difference Result 238 states and 327 transitions. [2022-03-20 17:58:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:58:00,278 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 17:58:00,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:00,279 INFO L225 Difference]: With dead ends: 238 [2022-03-20 17:58:00,279 INFO L226 Difference]: Without dead ends: 203 [2022-03-20 17:58:00,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:58:00,280 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 303 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:00,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 82 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-20 17:58:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 54. [2022-03-20 17:58:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-03-20 17:58:00,292 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 37 [2022-03-20 17:58:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:00,293 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-03-20 17:58:00,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:00,293 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-03-20 17:58:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 17:58:00,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:00,294 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:00,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:00,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 17:58:00,516 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 11 times [2022-03-20 17:58:00,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:00,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [57015429] [2022-03-20 17:58:00,518 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:00,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:00,518 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 12 times [2022-03-20 17:58:00,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:00,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528168393] [2022-03-20 17:58:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:00,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:00,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:58:00,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528168393] [2022-03-20 17:58:00,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528168393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059685485] [2022-03-20 17:58:00,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:00,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:00,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:00,619 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) [2022-03-20 17:58:00,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 17:58:00,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:00,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:00,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:00,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:58:00,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:00,963 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:00,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:58:01,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059685485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:01,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:01,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 20 [2022-03-20 17:58:01,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:01,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [57015429] [2022-03-20 17:58:01,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [57015429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:01,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:01,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:58:01,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138952916] [2022-03-20 17:58:01,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:01,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:58:01,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:01,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:58:01,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:58:01,014 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:01,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:01,555 INFO L93 Difference]: Finished difference Result 265 states and 365 transitions. [2022-03-20 17:58:01,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:58:01,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-20 17:58:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:01,559 INFO L225 Difference]: With dead ends: 265 [2022-03-20 17:58:01,559 INFO L226 Difference]: Without dead ends: 230 [2022-03-20 17:58:01,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:58:01,560 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 351 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:01,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 94 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:58:01,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-20 17:58:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 56. [2022-03-20 17:58:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-03-20 17:58:01,580 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 39 [2022-03-20 17:58:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:01,581 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-03-20 17:58:01,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:01,581 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-03-20 17:58:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 17:58:01,583 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:01,583 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:01,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:01,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:01,799 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:01,800 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 13 times [2022-03-20 17:58:01,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:01,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [252199311] [2022-03-20 17:58:01,801 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:01,801 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:01,801 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 14 times [2022-03-20 17:58:01,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:01,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654075225] [2022-03-20 17:58:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:01,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:01,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:58:01,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:01,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654075225] [2022-03-20 17:58:01,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654075225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:01,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039325983] [2022-03-20 17:58:01,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:01,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:01,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:01,920 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) [2022-03-20 17:58:01,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 17:58:01,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:01,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:01,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:01,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:02,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-20 17:58:02,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:02,274 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:02,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-20 17:58:02,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039325983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:02,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:02,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-03-20 17:58:02,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:02,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [252199311] [2022-03-20 17:58:02,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [252199311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:02,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:02,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:58:02,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415744538] [2022-03-20 17:58:02,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:02,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:58:02,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:02,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:58:02,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:58:02,318 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:02,998 INFO L93 Difference]: Finished difference Result 292 states and 403 transitions. [2022-03-20 17:58:02,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:58:02,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-20 17:58:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:02,999 INFO L225 Difference]: With dead ends: 292 [2022-03-20 17:58:02,999 INFO L226 Difference]: Without dead ends: 257 [2022-03-20 17:58:03,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:58:03,000 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 294 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:03,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 141 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:58:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-20 17:58:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 58. [2022-03-20 17:58:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-03-20 17:58:03,018 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 41 [2022-03-20 17:58:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:03,018 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-03-20 17:58:03,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-03-20 17:58:03,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 17:58:03,019 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:03,019 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:03,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:03,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 17:58:03,223 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 15 times [2022-03-20 17:58:03,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:03,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1740125909] [2022-03-20 17:58:03,225 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:03,225 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:03,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 16 times [2022-03-20 17:58:03,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:03,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376236764] [2022-03-20 17:58:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:03,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:03,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:58:03,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:03,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376236764] [2022-03-20 17:58:03,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376236764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:03,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234016329] [2022-03-20 17:58:03,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:03,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:03,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:03,348 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) [2022-03-20 17:58:03,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 17:58:03,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:03,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:03,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:03,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:03,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-20 17:58:03,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:03,684 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:03,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-20 17:58:03,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234016329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:03,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:03,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-03-20 17:58:03,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:03,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1740125909] [2022-03-20 17:58:03,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1740125909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:03,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:03,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:58:03,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230187267] [2022-03-20 17:58:03,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:03,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:58:03,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:03,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:58:03,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:58:03,735 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:04,515 INFO L93 Difference]: Finished difference Result 319 states and 441 transitions. [2022-03-20 17:58:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:58:04,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-20 17:58:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:04,517 INFO L225 Difference]: With dead ends: 319 [2022-03-20 17:58:04,517 INFO L226 Difference]: Without dead ends: 284 [2022-03-20 17:58:04,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:58:04,518 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 327 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:04,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 158 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:58:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-20 17:58:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 60. [2022-03-20 17:58:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-03-20 17:58:04,535 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 43 [2022-03-20 17:58:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:04,535 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-03-20 17:58:04,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-03-20 17:58:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 17:58:04,536 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:04,536 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:04,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:04,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 17:58:04,747 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 17 times [2022-03-20 17:58:04,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:04,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554481654] [2022-03-20 17:58:04,749 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:04,749 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:04,749 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 18 times [2022-03-20 17:58:04,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:04,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940120175] [2022-03-20 17:58:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:04,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:04,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:58:04,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:04,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940120175] [2022-03-20 17:58:04,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940120175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:04,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475379413] [2022-03-20 17:58:04,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:04,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:04,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:04,896 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) [2022-03-20 17:58:04,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 17:58:04,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:04,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:05,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-20 17:58:05,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:05,238 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:05,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-20 17:58:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475379413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:05,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:05,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 23 [2022-03-20 17:58:05,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:05,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554481654] [2022-03-20 17:58:05,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554481654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:05,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:05,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:58:05,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176349211] [2022-03-20 17:58:05,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:05,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:58:05,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:05,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:58:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:58:05,293 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:06,277 INFO L93 Difference]: Finished difference Result 346 states and 479 transitions. [2022-03-20 17:58:06,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:58:06,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-20 17:58:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:06,279 INFO L225 Difference]: With dead ends: 346 [2022-03-20 17:58:06,279 INFO L226 Difference]: Without dead ends: 311 [2022-03-20 17:58:06,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 17:58:06,280 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 405 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:06,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 160 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:58:06,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-20 17:58:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 62. [2022-03-20 17:58:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-03-20 17:58:06,302 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 45 [2022-03-20 17:58:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:06,303 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-03-20 17:58:06,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-03-20 17:58:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 17:58:06,303 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:06,303 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:06,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:06,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 17:58:06,527 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:06,528 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 19 times [2022-03-20 17:58:06,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:06,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1337829095] [2022-03-20 17:58:06,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:06,529 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:06,529 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 20 times [2022-03-20 17:58:06,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:06,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527879156] [2022-03-20 17:58:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:06,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:06,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:06,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:06,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527879156] [2022-03-20 17:58:06,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527879156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:06,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63515701] [2022-03-20 17:58:06,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:06,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:06,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:06,578 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) [2022-03-20 17:58:06,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 17:58:06,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:06,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:06,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:06,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:06,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:06,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:06,871 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:06,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:06,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63515701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:06,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:06,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 15 [2022-03-20 17:58:06,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:06,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1337829095] [2022-03-20 17:58:06,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1337829095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:06,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:06,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:58:06,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474999319] [2022-03-20 17:58:06,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:06,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:58:06,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:06,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:58:06,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:58:06,907 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:07,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:07,012 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-03-20 17:58:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:58:07,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-20 17:58:07,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:07,013 INFO L225 Difference]: With dead ends: 115 [2022-03-20 17:58:07,013 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 17:58:07,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:58:07,014 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:07,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:58:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 17:58:07,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-03-20 17:58:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2022-03-20 17:58:07,048 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 47 [2022-03-20 17:58:07,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:07,048 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2022-03-20 17:58:07,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2022-03-20 17:58:07,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 17:58:07,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:07,049 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 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] [2022-03-20 17:58:07,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:07,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 17:58:07,265 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 21 times [2022-03-20 17:58:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:07,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [458373793] [2022-03-20 17:58:07,267 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:07,267 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 22 times [2022-03-20 17:58:07,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:07,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284808825] [2022-03-20 17:58:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:07,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:07,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:07,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284808825] [2022-03-20 17:58:07,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284808825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:07,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299233193] [2022-03-20 17:58:07,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:07,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:07,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:07,347 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) [2022-03-20 17:58:07,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 17:58:07,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:07,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:07,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:07,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-20 17:58:07,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:07,660 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:07,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-20 17:58:07,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299233193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:07,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:07,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2022-03-20 17:58:07,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:07,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [458373793] [2022-03-20 17:58:07,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [458373793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:07,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:07,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:58:07,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805346188] [2022-03-20 17:58:07,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:07,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:58:07,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:58:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:58:07,714 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:07,846 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-03-20 17:58:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:58:07,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-20 17:58:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:07,847 INFO L225 Difference]: With dead ends: 143 [2022-03-20 17:58:07,847 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 17:58:07,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:58:07,848 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:07,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:58:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 17:58:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-03-20 17:58:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 85 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-03-20 17:58:07,889 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 50 [2022-03-20 17:58:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:07,890 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-03-20 17:58:07,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-03-20 17:58:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 17:58:07,890 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:07,891 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 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] [2022-03-20 17:58:07,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:08,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:08,103 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:08,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:08,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 23 times [2022-03-20 17:58:08,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:08,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [330307968] [2022-03-20 17:58:08,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:08,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 24 times [2022-03-20 17:58:08,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:08,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164033281] [2022-03-20 17:58:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:08,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:08,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:08,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:08,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164033281] [2022-03-20 17:58:08,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164033281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:08,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237478510] [2022-03-20 17:58:08,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:08,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:08,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:08,197 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) [2022-03-20 17:58:08,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 17:58:08,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:08,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:08,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:08,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-20 17:58:08,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:08,507 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:08,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-20 17:58:08,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237478510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:08,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:08,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2022-03-20 17:58:08,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:08,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [330307968] [2022-03-20 17:58:08,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [330307968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:08,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:08,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:58:08,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856349762] [2022-03-20 17:58:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:08,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:58:08,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:08,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:58:08,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:58:08,549 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:08,702 INFO L93 Difference]: Finished difference Result 167 states and 217 transitions. [2022-03-20 17:58:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:58:08,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-20 17:58:08,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:08,702 INFO L225 Difference]: With dead ends: 167 [2022-03-20 17:58:08,703 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 17:58:08,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:58:08,703 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:08,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 52 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:58:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 17:58:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-03-20 17:58:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 97 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-03-20 17:58:08,755 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 53 [2022-03-20 17:58:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:08,755 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-03-20 17:58:08,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-03-20 17:58:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 17:58:08,756 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:08,756 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:08,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:08,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 17:58:08,963 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 25 times [2022-03-20 17:58:08,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:08,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1874863752] [2022-03-20 17:58:08,965 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:08,965 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 26 times [2022-03-20 17:58:08,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:08,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023824429] [2022-03-20 17:58:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:08,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:09,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:09,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:09,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023824429] [2022-03-20 17:58:09,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023824429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:09,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363818701] [2022-03-20 17:58:09,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:09,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:09,046 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) [2022-03-20 17:58:09,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 17:58:09,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:09,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:09,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:09,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:09,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 17:58:09,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:09,395 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:09,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 17:58:09,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363818701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:09,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:09,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-03-20 17:58:09,436 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1874863752] [2022-03-20 17:58:09,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1874863752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:09,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:09,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:58:09,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025565646] [2022-03-20 17:58:09,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:09,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:58:09,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:09,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:58:09,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:58:09,438 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:09,618 INFO L93 Difference]: Finished difference Result 191 states and 249 transitions. [2022-03-20 17:58:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:58:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-20 17:58:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:09,620 INFO L225 Difference]: With dead ends: 191 [2022-03-20 17:58:09,620 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 17:58:09,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:58:09,621 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:09,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 56 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:58:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 17:58:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2022-03-20 17:58:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2660550458715596) internal successors, (138), 109 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-03-20 17:58:09,674 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 56 [2022-03-20 17:58:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:09,674 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-03-20 17:58:09,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:09,674 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-03-20 17:58:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 17:58:09,674 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:09,674 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:09,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 17:58:09,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 17:58:09,887 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 27 times [2022-03-20 17:58:09,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:09,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018730032] [2022-03-20 17:58:09,889 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:09,889 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:09,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 28 times [2022-03-20 17:58:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:09,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377361575] [2022-03-20 17:58:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:09,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:09,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:09,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377361575] [2022-03-20 17:58:09,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377361575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381180978] [2022-03-20 17:58:09,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:09,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:09,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:09,978 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) [2022-03-20 17:58:10,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 17:58:10,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:10,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:10,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:10,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:10,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 17:58:10,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:10,361 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:10,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 17:58:10,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381180978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:10,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:10,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-03-20 17:58:10,403 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:10,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1018730032] [2022-03-20 17:58:10,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1018730032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:10,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:10,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:58:10,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83654677] [2022-03-20 17:58:10,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:10,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:58:10,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:10,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:58:10,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:58:10,404 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:10,652 INFO L93 Difference]: Finished difference Result 215 states and 281 transitions. [2022-03-20 17:58:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:58:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-20 17:58:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:10,652 INFO L225 Difference]: With dead ends: 215 [2022-03-20 17:58:10,652 INFO L226 Difference]: Without dead ends: 134 [2022-03-20 17:58:10,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:58:10,653 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 102 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:10,653 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 80 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:58:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-20 17:58:10,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2022-03-20 17:58:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 121 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-03-20 17:58:10,700 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 59 [2022-03-20 17:58:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:10,701 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-03-20 17:58:10,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-03-20 17:58:10,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 17:58:10,701 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:10,702 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:10,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-20 17:58:10,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:10,911 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:10,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 29 times [2022-03-20 17:58:10,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:10,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1535533036] [2022-03-20 17:58:10,913 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:10,913 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:10,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 30 times [2022-03-20 17:58:10,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:10,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103757054] [2022-03-20 17:58:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:10,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:11,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:11,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:11,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103757054] [2022-03-20 17:58:11,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103757054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:11,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551374041] [2022-03-20 17:58:11,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:11,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:11,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:11,021 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) [2022-03-20 17:58:11,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 17:58:11,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:11,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:11,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:11,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:11,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-20 17:58:11,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:11,444 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:11,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-20 17:58:11,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551374041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:11,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:11,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 20 [2022-03-20 17:58:11,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:11,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1535533036] [2022-03-20 17:58:11,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1535533036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:11,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:11,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:58:11,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719096879] [2022-03-20 17:58:11,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:11,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:58:11,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:58:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:58:11,484 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:11,791 INFO L93 Difference]: Finished difference Result 239 states and 313 transitions. [2022-03-20 17:58:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:58:11,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-20 17:58:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:11,792 INFO L225 Difference]: With dead ends: 239 [2022-03-20 17:58:11,792 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 17:58:11,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:58:11,793 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:11,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 79 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:58:11,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 17:58:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-03-20 17:58:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.2781954887218046) internal successors, (170), 133 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2022-03-20 17:58:11,853 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 62 [2022-03-20 17:58:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:11,853 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2022-03-20 17:58:11,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2022-03-20 17:58:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 17:58:11,853 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:11,854 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:11,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:12,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:12,054 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 31 times [2022-03-20 17:58:12,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:12,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [72729694] [2022-03-20 17:58:12,056 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:12,056 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 32 times [2022-03-20 17:58:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:12,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994288644] [2022-03-20 17:58:12,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:12,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:12,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:12,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:12,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994288644] [2022-03-20 17:58:12,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994288644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:12,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263432341] [2022-03-20 17:58:12,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:12,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:12,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:12,186 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) [2022-03-20 17:58:12,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 17:58:12,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:12,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:12,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-03-20 17:58:12,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:12,631 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:12,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-03-20 17:58:12,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263432341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:12,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:12,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-03-20 17:58:12,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:12,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [72729694] [2022-03-20 17:58:12,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [72729694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:12,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:12,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:58:12,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116660346] [2022-03-20 17:58:12,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:12,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:58:12,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:12,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:58:12,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:58:12,674 INFO L87 Difference]: Start difference. First operand 138 states and 174 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:13,026 INFO L93 Difference]: Finished difference Result 263 states and 345 transitions. [2022-03-20 17:58:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:58:13,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-20 17:58:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:13,028 INFO L225 Difference]: With dead ends: 263 [2022-03-20 17:58:13,028 INFO L226 Difference]: Without dead ends: 158 [2022-03-20 17:58:13,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:58:13,029 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 146 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:13,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 73 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:58:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-20 17:58:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-03-20 17:58:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.282758620689655) internal successors, (186), 145 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2022-03-20 17:58:13,103 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 65 [2022-03-20 17:58:13,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:13,103 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2022-03-20 17:58:13,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2022-03-20 17:58:13,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:13,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:13,104 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:13,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 17:58:13,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:13,314 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 33 times [2022-03-20 17:58:13,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:13,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [200064233] [2022-03-20 17:58:13,316 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:13,316 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:13,316 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 34 times [2022-03-20 17:58:13,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:13,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310954085] [2022-03-20 17:58:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:13,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:13,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:13,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:13,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310954085] [2022-03-20 17:58:13,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310954085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:13,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912962727] [2022-03-20 17:58:13,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:13,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:13,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:13,784 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) [2022-03-20 17:58:13,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 17:58:13,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:14,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:14,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:14,281 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:14,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:14,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912962727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:14,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:14,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-03-20 17:58:14,331 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:14,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [200064233] [2022-03-20 17:58:14,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [200064233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:14,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:14,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:58:14,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114677922] [2022-03-20 17:58:14,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:14,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:58:14,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:14,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:58:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:58:14,333 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:15,167 INFO L93 Difference]: Finished difference Result 224 states and 287 transitions. [2022-03-20 17:58:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:58:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:15,168 INFO L225 Difference]: With dead ends: 224 [2022-03-20 17:58:15,168 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 17:58:15,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:58:15,169 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 165 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:15,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 79 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:58:15,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 17:58:15,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-03-20 17:58:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2802547770700636) internal successors, (201), 157 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 205 transitions. [2022-03-20 17:58:15,259 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 205 transitions. Word has length 68 [2022-03-20 17:58:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:15,259 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 205 transitions. [2022-03-20 17:58:15,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 205 transitions. [2022-03-20 17:58:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:15,260 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:15,260 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:15,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:15,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 17:58:15,476 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:15,476 INFO L85 PathProgramCache]: Analyzing trace with hash -222221800, now seen corresponding path program 1 times [2022-03-20 17:58:15,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:15,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1522043148] [2022-03-20 17:58:15,478 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:15,478 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash -222221800, now seen corresponding path program 2 times [2022-03-20 17:58:15,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:15,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911480953] [2022-03-20 17:58:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:15,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:15,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-20 17:58:15,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:15,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911480953] [2022-03-20 17:58:15,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911480953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:15,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288858] [2022-03-20 17:58:15,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:15,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:15,868 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) [2022-03-20 17:58:15,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 17:58:15,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:15,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:15,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:15,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:16,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:16,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:16,384 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:16,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:16,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:16,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:16,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-03-20 17:58:16,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:16,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1522043148] [2022-03-20 17:58:16,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1522043148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:16,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:16,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:58:16,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552318208] [2022-03-20 17:58:16,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:16,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:58:16,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:16,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:58:16,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:58:16,434 INFO L87 Difference]: Start difference. First operand 162 states and 205 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:16,959 INFO L93 Difference]: Finished difference Result 235 states and 300 transitions. [2022-03-20 17:58:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:58:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:16,960 INFO L225 Difference]: With dead ends: 235 [2022-03-20 17:58:16,960 INFO L226 Difference]: Without dead ends: 162 [2022-03-20 17:58:16,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:58:16,961 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 92 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:16,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 77 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-20 17:58:17,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-03-20 17:58:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2738853503184713) internal successors, (200), 157 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2022-03-20 17:58:17,074 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 68 [2022-03-20 17:58:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:17,074 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2022-03-20 17:58:17,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2022-03-20 17:58:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:17,075 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:17,075 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:17,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:17,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 17:58:17,289 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:17,290 INFO L85 PathProgramCache]: Analyzing trace with hash 200480026, now seen corresponding path program 3 times [2022-03-20 17:58:17,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:17,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [619644859] [2022-03-20 17:58:17,291 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:17,291 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash 200480026, now seen corresponding path program 4 times [2022-03-20 17:58:17,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:17,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469319620] [2022-03-20 17:58:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:17,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:17,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-20 17:58:17,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:17,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469319620] [2022-03-20 17:58:17,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469319620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:17,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470991899] [2022-03-20 17:58:17,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:17,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:17,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:17,684 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) [2022-03-20 17:58:17,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 17:58:17,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:17,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:18,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:18,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:18,203 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:18,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:18,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470991899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:18,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:18,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-20 17:58:18,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:18,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [619644859] [2022-03-20 17:58:18,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [619644859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:18,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:18,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:58:18,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058652735] [2022-03-20 17:58:18,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:18,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:58:18,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:58:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:58:18,256 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:18,823 INFO L93 Difference]: Finished difference Result 235 states and 298 transitions. [2022-03-20 17:58:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:58:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:18,824 INFO L225 Difference]: With dead ends: 235 [2022-03-20 17:58:18,824 INFO L226 Difference]: Without dead ends: 162 [2022-03-20 17:58:18,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:58:18,825 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:18,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 84 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-20 17:58:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-03-20 17:58:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.267515923566879) internal successors, (199), 157 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2022-03-20 17:58:18,900 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 68 [2022-03-20 17:58:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:18,901 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2022-03-20 17:58:18,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2022-03-20 17:58:18,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:18,901 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:18,902 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:18,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 17:58:19,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:19,103 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:19,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1079383652, now seen corresponding path program 5 times [2022-03-20 17:58:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1290912662] [2022-03-20 17:58:19,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:19,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:19,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1079383652, now seen corresponding path program 6 times [2022-03-20 17:58:19,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:19,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150505145] [2022-03-20 17:58:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:19,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:19,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 17:58:19,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150505145] [2022-03-20 17:58:19,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150505145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257686636] [2022-03-20 17:58:19,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:19,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:19,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:19,504 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) [2022-03-20 17:58:19,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 17:58:19,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:19,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:19,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:19,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:19,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:19,982 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:19,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:20,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257686636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:20,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:20,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 23 [2022-03-20 17:58:20,023 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:20,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1290912662] [2022-03-20 17:58:20,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1290912662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:20,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:20,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:58:20,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753339776] [2022-03-20 17:58:20,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:20,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:58:20,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:20,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:58:20,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:58:20,025 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:20,616 INFO L93 Difference]: Finished difference Result 235 states and 296 transitions. [2022-03-20 17:58:20,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:58:20,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:20,617 INFO L225 Difference]: With dead ends: 235 [2022-03-20 17:58:20,617 INFO L226 Difference]: Without dead ends: 162 [2022-03-20 17:58:20,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 17:58:20,618 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:20,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 78 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-20 17:58:20,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-03-20 17:58:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2611464968152866) internal successors, (198), 157 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2022-03-20 17:58:20,717 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 68 [2022-03-20 17:58:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:20,717 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2022-03-20 17:58:20,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2022-03-20 17:58:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:20,718 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:20,718 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:20,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:20,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:20,931 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1221438938, now seen corresponding path program 7 times [2022-03-20 17:58:20,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:20,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1479321344] [2022-03-20 17:58:20,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:20,933 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:20,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1221438938, now seen corresponding path program 8 times [2022-03-20 17:58:20,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:20,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021388947] [2022-03-20 17:58:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:20,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:21,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-20 17:58:21,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:21,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021388947] [2022-03-20 17:58:21,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021388947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:21,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325741025] [2022-03-20 17:58:21,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:21,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:21,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:21,379 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) [2022-03-20 17:58:21,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 17:58:21,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:21,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:21,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:21,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:21,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:21,915 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:21,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:21,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325741025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:21,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:21,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-03-20 17:58:21,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1479321344] [2022-03-20 17:58:21,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1479321344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:21,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:21,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:58:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303811742] [2022-03-20 17:58:21,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:21,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:58:21,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:58:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:58:21,958 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:22,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:22,453 INFO L93 Difference]: Finished difference Result 242 states and 303 transitions. [2022-03-20 17:58:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:58:22,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:22,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:22,454 INFO L225 Difference]: With dead ends: 242 [2022-03-20 17:58:22,454 INFO L226 Difference]: Without dead ends: 169 [2022-03-20 17:58:22,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:58:22,455 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 77 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:22,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 63 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:58:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-20 17:58:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-03-20 17:58:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 163 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:22,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2022-03-20 17:58:22,566 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 68 [2022-03-20 17:58:22,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:22,566 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2022-03-20 17:58:22,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2022-03-20 17:58:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:22,567 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:22,567 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:22,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:22,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 17:58:22,783 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash -614400744, now seen corresponding path program 9 times [2022-03-20 17:58:22,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:22,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67715531] [2022-03-20 17:58:22,785 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:22,785 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:22,785 INFO L85 PathProgramCache]: Analyzing trace with hash -614400744, now seen corresponding path program 10 times [2022-03-20 17:58:22,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:22,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869166750] [2022-03-20 17:58:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:22,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:23,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:23,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:23,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869166750] [2022-03-20 17:58:23,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869166750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:23,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736562831] [2022-03-20 17:58:23,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:23,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:23,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:23,140 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) [2022-03-20 17:58:23,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 17:58:23,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:23,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:23,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:23,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:23,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:23,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:23,610 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:23,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:23,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736562831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:23,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:23,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-03-20 17:58:23,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:23,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67715531] [2022-03-20 17:58:23,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67715531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:23,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:23,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:58:23,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024733210] [2022-03-20 17:58:23,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:23,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:58:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:58:23,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:58:23,654 INFO L87 Difference]: Start difference. First operand 168 states and 209 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:24,365 INFO L93 Difference]: Finished difference Result 254 states and 317 transitions. [2022-03-20 17:58:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:58:24,365 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:24,366 INFO L225 Difference]: With dead ends: 254 [2022-03-20 17:58:24,366 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 17:58:24,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:58:24,366 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:24,367 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 103 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:58:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 17:58:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-03-20 17:58:24,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2590361445783131) internal successors, (209), 166 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions. [2022-03-20 17:58:24,451 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 68 [2022-03-20 17:58:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:24,451 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions. [2022-03-20 17:58:24,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions. [2022-03-20 17:58:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:24,451 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:24,451 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:24,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 17:58:24,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 17:58:24,652 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash -356235306, now seen corresponding path program 11 times [2022-03-20 17:58:24,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:24,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [433751982] [2022-03-20 17:58:24,654 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:24,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash -356235306, now seen corresponding path program 12 times [2022-03-20 17:58:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:24,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228112115] [2022-03-20 17:58:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:24,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:25,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-20 17:58:25,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:25,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228112115] [2022-03-20 17:58:25,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228112115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:25,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115351335] [2022-03-20 17:58:25,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:25,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:25,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:25,036 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) [2022-03-20 17:58:25,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 17:58:25,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:25,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:25,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:25,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:25,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:25,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:25,506 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:25,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:25,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115351335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:25,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:25,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-20 17:58:25,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:25,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [433751982] [2022-03-20 17:58:25,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [433751982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:25,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:25,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:58:25,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651062900] [2022-03-20 17:58:25,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:25,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:58:25,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:25,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:58:25,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:58:25,555 INFO L87 Difference]: Start difference. First operand 171 states and 213 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:26,145 INFO L93 Difference]: Finished difference Result 254 states and 317 transitions. [2022-03-20 17:58:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:58:26,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:26,146 INFO L225 Difference]: With dead ends: 254 [2022-03-20 17:58:26,146 INFO L226 Difference]: Without dead ends: 172 [2022-03-20 17:58:26,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:58:26,147 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 116 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:26,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 93 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-20 17:58:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2022-03-20 17:58:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 163 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2022-03-20 17:58:26,238 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 68 [2022-03-20 17:58:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:26,238 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2022-03-20 17:58:26,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2022-03-20 17:58:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:26,239 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:26,239 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:26,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 17:58:26,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 17:58:26,440 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:26,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1636098984, now seen corresponding path program 13 times [2022-03-20 17:58:26,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:26,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674851830] [2022-03-20 17:58:26,441 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:26,441 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1636098984, now seen corresponding path program 14 times [2022-03-20 17:58:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:26,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148092367] [2022-03-20 17:58:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:26,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:26,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 17:58:26,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:26,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148092367] [2022-03-20 17:58:26,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148092367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:26,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428179742] [2022-03-20 17:58:26,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:26,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:26,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:26,769 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) [2022-03-20 17:58:26,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 17:58:26,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:26,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:26,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:26,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:27,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:27,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:27,221 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:27,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:27,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428179742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:27,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:27,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-20 17:58:27,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:27,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674851830] [2022-03-20 17:58:27,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674851830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:27,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:27,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:58:27,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392056966] [2022-03-20 17:58:27,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:27,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:58:27,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:58:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:58:27,263 INFO L87 Difference]: Start difference. First operand 168 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:27,823 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2022-03-20 17:58:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:58:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:27,824 INFO L225 Difference]: With dead ends: 251 [2022-03-20 17:58:27,824 INFO L226 Difference]: Without dead ends: 172 [2022-03-20 17:58:27,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:58:27,825 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 131 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:27,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 77 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-20 17:58:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-03-20 17:58:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2022-03-20 17:58:27,913 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 68 [2022-03-20 17:58:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:27,913 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2022-03-20 17:58:27,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2022-03-20 17:58:27,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:27,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:27,913 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:27,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 17:58:28,114 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 17:58:28,114 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:28,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1686421846, now seen corresponding path program 15 times [2022-03-20 17:58:28,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:28,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182528252] [2022-03-20 17:58:28,115 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:28,116 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:28,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1686421846, now seen corresponding path program 16 times [2022-03-20 17:58:28,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:28,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358141082] [2022-03-20 17:58:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:28,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:28,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:28,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:28,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358141082] [2022-03-20 17:58:28,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358141082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:28,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757034367] [2022-03-20 17:58:28,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:28,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:28,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:28,436 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) [2022-03-20 17:58:28,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 17:58:28,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:28,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:28,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:28,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:28,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:28,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:28,933 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:28,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:28,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757034367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:28,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:28,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 25 [2022-03-20 17:58:28,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:28,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182528252] [2022-03-20 17:58:28,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182528252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:28,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:28,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:58:28,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627574540] [2022-03-20 17:58:28,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:28,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:58:28,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:58:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:58:28,977 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:29,674 INFO L93 Difference]: Finished difference Result 257 states and 319 transitions. [2022-03-20 17:58:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:58:29,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:29,675 INFO L225 Difference]: With dead ends: 257 [2022-03-20 17:58:29,675 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 17:58:29,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 17:58:29,677 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 141 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:29,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 89 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:58:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 17:58:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-03-20 17:58:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2022-03-20 17:58:29,767 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 68 [2022-03-20 17:58:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:29,767 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2022-03-20 17:58:29,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2022-03-20 17:58:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:29,767 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:29,767 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:29,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 17:58:29,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:29,968 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:29,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:29,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1944587284, now seen corresponding path program 17 times [2022-03-20 17:58:29,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:29,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [379381363] [2022-03-20 17:58:29,969 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:29,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1944587284, now seen corresponding path program 18 times [2022-03-20 17:58:29,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:29,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532589692] [2022-03-20 17:58:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:30,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-20 17:58:30,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:30,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532589692] [2022-03-20 17:58:30,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532589692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046580731] [2022-03-20 17:58:30,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:30,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:30,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:30,328 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) [2022-03-20 17:58:30,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 17:58:30,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:30,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:30,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:30,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:30,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:30,792 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:30,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:30,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046580731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:30,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:30,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-20 17:58:30,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:30,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [379381363] [2022-03-20 17:58:30,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [379381363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:30,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:30,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:58:30,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221341700] [2022-03-20 17:58:30,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:30,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:58:30,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:30,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:58:30,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:58:30,836 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:31,408 INFO L93 Difference]: Finished difference Result 257 states and 319 transitions. [2022-03-20 17:58:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:58:31,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:31,409 INFO L225 Difference]: With dead ends: 257 [2022-03-20 17:58:31,409 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 17:58:31,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:58:31,410 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:31,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 70 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 17:58:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-20 17:58:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 169 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-03-20 17:58:31,500 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 68 [2022-03-20 17:58:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:31,500 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-03-20 17:58:31,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-03-20 17:58:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:31,501 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:31,501 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:31,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-20 17:58:31,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:31,702 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:31,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:31,702 INFO L85 PathProgramCache]: Analyzing trace with hash 406558168, now seen corresponding path program 19 times [2022-03-20 17:58:31,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:31,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1487997639] [2022-03-20 17:58:31,703 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:31,703 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:31,703 INFO L85 PathProgramCache]: Analyzing trace with hash 406558168, now seen corresponding path program 20 times [2022-03-20 17:58:31,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:31,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64632718] [2022-03-20 17:58:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:31,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:32,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:32,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:32,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64632718] [2022-03-20 17:58:32,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64632718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:32,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118794057] [2022-03-20 17:58:32,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:32,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:32,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:32,056 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) [2022-03-20 17:58:32,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 17:58:32,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:32,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:32,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:32,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:32,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:32,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:32,516 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:32,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:32,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118794057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:32,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:32,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-03-20 17:58:32,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:32,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1487997639] [2022-03-20 17:58:32,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1487997639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:32,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:32,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:58:32,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583232641] [2022-03-20 17:58:32,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:32,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:58:32,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:58:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:58:32,561 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:33,244 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-03-20 17:58:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:58:33,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:33,245 INFO L225 Difference]: With dead ends: 263 [2022-03-20 17:58:33,245 INFO L226 Difference]: Without dead ends: 178 [2022-03-20 17:58:33,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:58:33,246 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 133 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:33,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 95 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-20 17:58:33,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2022-03-20 17:58:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 163 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2022-03-20 17:58:33,340 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 68 [2022-03-20 17:58:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:33,341 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2022-03-20 17:58:33,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2022-03-20 17:58:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:33,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:33,341 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:33,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 17:58:33,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-20 17:58:33,542 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash 664723606, now seen corresponding path program 21 times [2022-03-20 17:58:33,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:33,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712167380] [2022-03-20 17:58:33,543 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:33,543 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash 664723606, now seen corresponding path program 22 times [2022-03-20 17:58:33,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:33,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678212228] [2022-03-20 17:58:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:33,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:33,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-20 17:58:33,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:33,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678212228] [2022-03-20 17:58:33,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678212228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:33,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474092894] [2022-03-20 17:58:33,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:33,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:33,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:33,980 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:58:34,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 17:58:34,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:34,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:34,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:34,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:34,439 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:34,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:34,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474092894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:34,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:34,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-03-20 17:58:34,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:34,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712167380] [2022-03-20 17:58:34,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712167380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:34,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:34,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:58:34,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732653922] [2022-03-20 17:58:34,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:34,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:58:34,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:34,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:58:34,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:58:34,497 INFO L87 Difference]: Start difference. First operand 168 states and 209 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:35,038 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2022-03-20 17:58:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:58:35,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:35,039 INFO L225 Difference]: With dead ends: 251 [2022-03-20 17:58:35,039 INFO L226 Difference]: Without dead ends: 172 [2022-03-20 17:58:35,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:58:35,040 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 82 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:35,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 64 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:58:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-20 17:58:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-03-20 17:58:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2022-03-20 17:58:35,133 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 68 [2022-03-20 17:58:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:35,133 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2022-03-20 17:58:35,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2022-03-20 17:58:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:35,134 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:35,134 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:35,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 17:58:35,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:35,335 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1213397158, now seen corresponding path program 23 times [2022-03-20 17:58:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:35,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [599777982] [2022-03-20 17:58:35,336 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:35,336 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:35,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1213397158, now seen corresponding path program 24 times [2022-03-20 17:58:35,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:35,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794718707] [2022-03-20 17:58:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:35,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:35,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 17:58:35,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:35,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794718707] [2022-03-20 17:58:35,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794718707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:35,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090321767] [2022-03-20 17:58:35,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:35,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:35,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:35,744 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) [2022-03-20 17:58:35,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 17:58:35,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:35,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:35,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:35,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:36,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:36,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:36,203 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:36,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:36,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090321767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:36,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:36,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-20 17:58:36,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:36,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [599777982] [2022-03-20 17:58:36,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [599777982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:36,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:36,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:58:36,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210259327] [2022-03-20 17:58:36,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:36,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:58:36,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:58:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:58:36,247 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:36,861 INFO L93 Difference]: Finished difference Result 257 states and 319 transitions. [2022-03-20 17:58:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:58:36,862 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:36,862 INFO L225 Difference]: With dead ends: 257 [2022-03-20 17:58:36,862 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 17:58:36,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:58:36,863 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:36,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 73 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:58:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 17:58:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-20 17:58:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 169 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-03-20 17:58:36,996 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 68 [2022-03-20 17:58:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:36,996 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-03-20 17:58:36,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-03-20 17:58:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:36,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:36,997 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:37,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:37,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:37,213 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:37,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1927678186, now seen corresponding path program 25 times [2022-03-20 17:58:37,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:37,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1338036717] [2022-03-20 17:58:37,214 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:37,214 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1927678186, now seen corresponding path program 26 times [2022-03-20 17:58:37,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:37,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211576879] [2022-03-20 17:58:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:37,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:37,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-20 17:58:37,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:37,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211576879] [2022-03-20 17:58:37,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211576879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:37,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100273421] [2022-03-20 17:58:37,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:37,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:37,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:37,733 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) [2022-03-20 17:58:37,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 17:58:37,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:37,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:37,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:37,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:38,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:38,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:38,239 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:38,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:38,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100273421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:38,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:38,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-20 17:58:38,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:38,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1338036717] [2022-03-20 17:58:38,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1338036717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:38,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:38,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:58:38,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021998437] [2022-03-20 17:58:38,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:38,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:58:38,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:38,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:58:38,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:58:38,284 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:38,923 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-03-20 17:58:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:58:38,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:38,924 INFO L225 Difference]: With dead ends: 263 [2022-03-20 17:58:38,924 INFO L226 Difference]: Without dead ends: 178 [2022-03-20 17:58:38,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:58:38,924 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 77 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:38,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 78 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:38,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-20 17:58:39,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-03-20 17:58:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.244186046511628) internal successors, (214), 172 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 218 transitions. [2022-03-20 17:58:39,012 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 218 transitions. Word has length 68 [2022-03-20 17:58:39,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:39,012 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 218 transitions. [2022-03-20 17:58:39,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:39,012 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 218 transitions. [2022-03-20 17:58:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:39,013 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:39,013 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:39,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-20 17:58:39,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 17:58:39,216 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash 829259994, now seen corresponding path program 27 times [2022-03-20 17:58:39,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:39,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731805965] [2022-03-20 17:58:39,217 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:39,218 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:39,218 INFO L85 PathProgramCache]: Analyzing trace with hash 829259994, now seen corresponding path program 28 times [2022-03-20 17:58:39,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:39,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048253004] [2022-03-20 17:58:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:39,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:39,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:39,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:39,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048253004] [2022-03-20 17:58:39,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048253004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:39,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17090532] [2022-03-20 17:58:39,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:39,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:39,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:39,754 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) [2022-03-20 17:58:39,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 17:58:39,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:39,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:39,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:40,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:40,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:40,313 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:40,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:40,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17090532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:40,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:40,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-03-20 17:58:40,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:40,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731805965] [2022-03-20 17:58:40,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731805965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:40,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:40,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:58:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771405351] [2022-03-20 17:58:40,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:40,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:58:40,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:40,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:58:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:58:40,368 INFO L87 Difference]: Start difference. First operand 177 states and 218 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:41,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:41,205 INFO L93 Difference]: Finished difference Result 305 states and 371 transitions. [2022-03-20 17:58:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:58:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:41,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:41,206 INFO L225 Difference]: With dead ends: 305 [2022-03-20 17:58:41,206 INFO L226 Difference]: Without dead ends: 217 [2022-03-20 17:58:41,207 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:58:41,208 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 140 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:41,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 85 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-20 17:58:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2022-03-20 17:58:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.2459893048128343) internal successors, (233), 187 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 237 transitions. [2022-03-20 17:58:41,331 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 237 transitions. Word has length 68 [2022-03-20 17:58:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:41,331 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 237 transitions. [2022-03-20 17:58:41,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 237 transitions. [2022-03-20 17:58:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:41,332 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:41,332 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:41,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:41,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 17:58:41,532 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:41,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1087425432, now seen corresponding path program 29 times [2022-03-20 17:58:41,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:41,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [709125082] [2022-03-20 17:58:41,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:41,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:41,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1087425432, now seen corresponding path program 30 times [2022-03-20 17:58:41,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:41,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482376801] [2022-03-20 17:58:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:41,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:41,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-03-20 17:58:41,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:41,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482376801] [2022-03-20 17:58:41,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482376801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:41,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404304157] [2022-03-20 17:58:41,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:41,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:41,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:41,892 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) [2022-03-20 17:58:41,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 17:58:42,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:42,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:42,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:42,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:42,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:42,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:42,418 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:42,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:42,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404304157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:42,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:42,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-03-20 17:58:42,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:42,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [709125082] [2022-03-20 17:58:42,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [709125082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:42,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:42,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:58:42,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509163202] [2022-03-20 17:58:42,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:42,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:58:42,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:58:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:58:42,463 INFO L87 Difference]: Start difference. First operand 192 states and 237 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:42,795 INFO L93 Difference]: Finished difference Result 299 states and 369 transitions. [2022-03-20 17:58:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:58:42,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:42,796 INFO L225 Difference]: With dead ends: 299 [2022-03-20 17:58:42,796 INFO L226 Difference]: Without dead ends: 196 [2022-03-20 17:58:42,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:58:42,797 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:42,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 53 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:58:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-20 17:58:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-03-20 17:58:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.2421052631578948) internal successors, (236), 190 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2022-03-20 17:58:42,927 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 68 [2022-03-20 17:58:42,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:42,927 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2022-03-20 17:58:42,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2022-03-20 17:58:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:42,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:42,928 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:42,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-20 17:58:43,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 17:58:43,129 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1244071192, now seen corresponding path program 31 times [2022-03-20 17:58:43,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:43,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1220051728] [2022-03-20 17:58:43,130 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:43,131 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1244071192, now seen corresponding path program 32 times [2022-03-20 17:58:43,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:43,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606547032] [2022-03-20 17:58:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:43,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:43,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-20 17:58:43,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:43,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606547032] [2022-03-20 17:58:43,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606547032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:43,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691017378] [2022-03-20 17:58:43,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:43,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:43,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:43,456 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) [2022-03-20 17:58:43,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 17:58:43,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:43,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:43,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:43,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:43,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:43,934 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:43,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:43,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691017378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:43,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:43,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-03-20 17:58:43,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:43,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1220051728] [2022-03-20 17:58:43,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1220051728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:43,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:43,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:58:43,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829732725] [2022-03-20 17:58:43,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:43,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:58:43,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:58:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:58:43,975 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:44,421 INFO L93 Difference]: Finished difference Result 312 states and 384 transitions. [2022-03-20 17:58:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:58:44,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:44,422 INFO L225 Difference]: With dead ends: 312 [2022-03-20 17:58:44,422 INFO L226 Difference]: Without dead ends: 206 [2022-03-20 17:58:44,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-03-20 17:58:44,423 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:44,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 64 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:58:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-20 17:58:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2022-03-20 17:58:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.236180904522613) internal successors, (246), 199 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 250 transitions. [2022-03-20 17:58:44,543 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 250 transitions. Word has length 68 [2022-03-20 17:58:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:44,543 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 250 transitions. [2022-03-20 17:58:44,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 250 transitions. [2022-03-20 17:58:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:44,544 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:44,544 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:44,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:44,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:44,759 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash 687355860, now seen corresponding path program 33 times [2022-03-20 17:58:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:44,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306004148] [2022-03-20 17:58:44,761 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:44,761 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash 687355860, now seen corresponding path program 34 times [2022-03-20 17:58:44,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:44,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121015855] [2022-03-20 17:58:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:45,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-20 17:58:45,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121015855] [2022-03-20 17:58:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121015855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301019926] [2022-03-20 17:58:45,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:45,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:45,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:45,148 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) [2022-03-20 17:58:45,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 17:58:45,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:45,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:45,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:45,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:45,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:45,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:45,711 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:45,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:45,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301019926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:45,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:45,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 23 [2022-03-20 17:58:45,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:45,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306004148] [2022-03-20 17:58:45,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306004148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:45,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:45,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:58:45,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195893106] [2022-03-20 17:58:45,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:45,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:58:45,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:45,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:58:45,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:58:45,764 INFO L87 Difference]: Start difference. First operand 204 states and 250 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:46,313 INFO L93 Difference]: Finished difference Result 327 states and 400 transitions. [2022-03-20 17:58:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:58:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:46,314 INFO L225 Difference]: With dead ends: 327 [2022-03-20 17:58:46,314 INFO L226 Difference]: Without dead ends: 212 [2022-03-20 17:58:46,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-20 17:58:46,315 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 94 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:46,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 65 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:58:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-20 17:58:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2022-03-20 17:58:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2292682926829268) internal successors, (252), 205 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 256 transitions. [2022-03-20 17:58:46,431 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 256 transitions. Word has length 68 [2022-03-20 17:58:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:46,431 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 256 transitions. [2022-03-20 17:58:46,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 256 transitions. [2022-03-20 17:58:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:46,432 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:46,432 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:46,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-20 17:58:46,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 17:58:46,632 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:46,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1190764904, now seen corresponding path program 35 times [2022-03-20 17:58:46,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:46,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [252703462] [2022-03-20 17:58:46,634 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:46,634 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:46,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1190764904, now seen corresponding path program 36 times [2022-03-20 17:58:46,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:46,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416068065] [2022-03-20 17:58:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:46,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:47,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 17:58:47,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:47,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416068065] [2022-03-20 17:58:47,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416068065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:47,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78752023] [2022-03-20 17:58:47,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:47,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:47,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:47,084 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) [2022-03-20 17:58:47,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 17:58:47,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:47,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:47,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:47,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:47,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:47,620 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:47,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:47,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78752023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:47,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:47,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-20 17:58:47,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:47,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [252703462] [2022-03-20 17:58:47,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [252703462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:47,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:47,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:58:47,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569420508] [2022-03-20 17:58:47,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:47,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:58:47,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:47,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:58:47,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:58:47,665 INFO L87 Difference]: Start difference. First operand 210 states and 256 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:48,224 INFO L93 Difference]: Finished difference Result 339 states and 412 transitions. [2022-03-20 17:58:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:58:48,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:48,225 INFO L225 Difference]: With dead ends: 339 [2022-03-20 17:58:48,225 INFO L226 Difference]: Without dead ends: 218 [2022-03-20 17:58:48,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:58:48,226 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:48,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 74 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:58:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-20 17:58:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2022-03-20 17:58:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.2227488151658767) internal successors, (258), 211 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 262 transitions. [2022-03-20 17:58:48,355 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 262 transitions. Word has length 68 [2022-03-20 17:58:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:48,355 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 262 transitions. [2022-03-20 17:58:48,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 262 transitions. [2022-03-20 17:58:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:48,355 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:48,355 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:48,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 17:58:48,556 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 17:58:48,556 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:48,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:48,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1905045932, now seen corresponding path program 37 times [2022-03-20 17:58:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:48,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1072671488] [2022-03-20 17:58:48,557 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:48,557 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:48,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1905045932, now seen corresponding path program 38 times [2022-03-20 17:58:48,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:48,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875868404] [2022-03-20 17:58:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:48,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:48,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-20 17:58:48,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:48,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875868404] [2022-03-20 17:58:48,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875868404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:48,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407717758] [2022-03-20 17:58:48,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:48,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:48,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:48,952 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) [2022-03-20 17:58:48,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 17:58:49,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:49,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:49,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 17:58:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:49,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:49,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:49,435 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:49,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:49,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407717758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:49,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:49,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 25 [2022-03-20 17:58:49,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:49,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1072671488] [2022-03-20 17:58:49,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1072671488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:49,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:49,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:58:49,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441031723] [2022-03-20 17:58:49,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:49,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:58:49,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:49,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:58:49,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:58:49,479 INFO L87 Difference]: Start difference. First operand 216 states and 262 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:50,095 INFO L93 Difference]: Finished difference Result 351 states and 424 transitions. [2022-03-20 17:58:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:58:50,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:50,096 INFO L225 Difference]: With dead ends: 351 [2022-03-20 17:58:50,096 INFO L226 Difference]: Without dead ends: 224 [2022-03-20 17:58:50,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 17:58:50,097 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 70 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:50,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 79 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:58:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-20 17:58:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 195. [2022-03-20 17:58:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.2421052631578948) internal successors, (236), 190 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2022-03-20 17:58:50,205 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 68 [2022-03-20 17:58:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:50,205 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2022-03-20 17:58:50,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2022-03-20 17:58:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:58:50,206 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:50,206 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:50,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-20 17:58:50,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:50,407 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1110057686, now seen corresponding path program 39 times [2022-03-20 17:58:50,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:50,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1007792154] [2022-03-20 17:58:50,408 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:50,408 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1110057686, now seen corresponding path program 40 times [2022-03-20 17:58:50,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:50,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361818319] [2022-03-20 17:58:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:50,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:50,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:50,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361818319] [2022-03-20 17:58:50,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361818319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20379945] [2022-03-20 17:58:50,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:50,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:50,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:50,583 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) [2022-03-20 17:58:50,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 17:58:50,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:50,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:50,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:58:50,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:50,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:50,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:51,057 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-20 17:58:51,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-20 17:58:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 17:58:51,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20379945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:51,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:51,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 14 [2022-03-20 17:58:51,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:51,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1007792154] [2022-03-20 17:58:51,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1007792154] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:51,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:51,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:58:51,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550561788] [2022-03-20 17:58:51,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:51,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:58:51,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:58:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:58:51,098 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:51,445 INFO L93 Difference]: Finished difference Result 335 states and 415 transitions. [2022-03-20 17:58:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:58:51,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 17:58:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:51,446 INFO L225 Difference]: With dead ends: 335 [2022-03-20 17:58:51,446 INFO L226 Difference]: Without dead ends: 330 [2022-03-20 17:58:51,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:58:51,447 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 94 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:51,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 46 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:58:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-20 17:58:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 197. [2022-03-20 17:58:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.2395833333333333) internal successors, (238), 192 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 242 transitions. [2022-03-20 17:58:51,599 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 242 transitions. Word has length 68 [2022-03-20 17:58:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:51,599 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 242 transitions. [2022-03-20 17:58:51,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 242 transitions. [2022-03-20 17:58:51,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 17:58:51,600 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:51,600 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:51,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 17:58:51,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-20 17:58:51,800 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:51,801 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 1 times [2022-03-20 17:58:51,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:51,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1072836652] [2022-03-20 17:58:51,802 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:51,802 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 2 times [2022-03-20 17:58:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:51,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319194510] [2022-03-20 17:58:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:51,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:51,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:51,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319194510] [2022-03-20 17:58:51,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319194510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:51,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415479271] [2022-03-20 17:58:51,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:51,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:51,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:51,924 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) [2022-03-20 17:58:51,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 17:58:52,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:52,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 17:58:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:52,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-20 17:58:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-03-20 17:58:52,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 17:58:52,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415479271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:52,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:52,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 11] total 26 [2022-03-20 17:58:52,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1072836652] [2022-03-20 17:58:52,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1072836652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:52,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:52,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:58:52,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382369278] [2022-03-20 17:58:52,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:52,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:58:52,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:58:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:58:52,767 INFO L87 Difference]: Start difference. First operand 197 states and 242 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:53,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:53,399 INFO L93 Difference]: Finished difference Result 288 states and 365 transitions. [2022-03-20 17:58:53,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:58:53,400 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-20 17:58:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:53,401 INFO L225 Difference]: With dead ends: 288 [2022-03-20 17:58:53,401 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 17:58:53,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:58:53,402 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 145 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:53,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 111 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 17:58:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 203. [2022-03-20 17:58:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.2424242424242424) internal successors, (246), 198 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 250 transitions. [2022-03-20 17:58:53,573 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 250 transitions. Word has length 69 [2022-03-20 17:58:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:53,574 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 250 transitions. [2022-03-20 17:58:53,574 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 250 transitions. [2022-03-20 17:58:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 17:58:53,574 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:53,575 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:53,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:53,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:53,784 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:53,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 3 times [2022-03-20 17:58:53,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:53,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [469268576] [2022-03-20 17:58:53,785 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:53,785 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:53,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 4 times [2022-03-20 17:58:53,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:53,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017692411] [2022-03-20 17:58:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:53,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:53,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 17:58:53,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:53,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017692411] [2022-03-20 17:58:53,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017692411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:53,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382930093] [2022-03-20 17:58:53,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:53,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:53,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:53,917 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) [2022-03-20 17:58:53,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 17:58:54,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:54,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:54,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 17:58:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-03-20 17:58:54,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:54,328 INFO L356 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-03-20 17:58:54,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 8 [2022-03-20 17:58:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-03-20 17:58:54,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382930093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:54,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:54,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 9] total 25 [2022-03-20 17:58:54,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:54,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [469268576] [2022-03-20 17:58:54,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [469268576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:54,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:54,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:58:54,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365308374] [2022-03-20 17:58:54,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:54,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:58:54,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:54,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:58:54,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:58:54,429 INFO L87 Difference]: Start difference. First operand 203 states and 250 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:54,965 INFO L93 Difference]: Finished difference Result 387 states and 486 transitions. [2022-03-20 17:58:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:58:54,965 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 17:58:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:54,966 INFO L225 Difference]: With dead ends: 387 [2022-03-20 17:58:54,966 INFO L226 Difference]: Without dead ends: 217 [2022-03-20 17:58:54,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:58:54,967 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:54,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 93 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:58:54,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-20 17:58:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 209. [2022-03-20 17:58:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.2352941176470589) internal successors, (252), 204 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 256 transitions. [2022-03-20 17:58:55,138 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 256 transitions. Word has length 72 [2022-03-20 17:58:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:55,138 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 256 transitions. [2022-03-20 17:58:55,139 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 256 transitions. [2022-03-20 17:58:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 17:58:55,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:55,139 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:55,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:55,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:55,363 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:55,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 5 times [2022-03-20 17:58:55,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:55,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1326815711] [2022-03-20 17:58:55,367 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:55,367 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:55,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 6 times [2022-03-20 17:58:55,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:55,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042020342] [2022-03-20 17:58:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:55,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:55,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 17:58:55,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:55,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042020342] [2022-03-20 17:58:55,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042020342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:55,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384744215] [2022-03-20 17:58:55,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:55,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:55,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:55,445 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) [2022-03-20 17:58:55,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 17:58:55,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:58:55,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:55,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:58:55,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:55,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-20 17:58:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-03-20 17:58:55,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-03-20 17:58:55,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384744215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:55,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:55,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2022-03-20 17:58:55,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:55,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1326815711] [2022-03-20 17:58:55,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1326815711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:55,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:55,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:58:55,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810628443] [2022-03-20 17:58:55,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:55,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:58:55,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:58:55,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:58:55,902 INFO L87 Difference]: Start difference. First operand 209 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:56,701 INFO L93 Difference]: Finished difference Result 921 states and 1158 transitions. [2022-03-20 17:58:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:58:56,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-20 17:58:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:56,703 INFO L225 Difference]: With dead ends: 921 [2022-03-20 17:58:56,703 INFO L226 Difference]: Without dead ends: 847 [2022-03-20 17:58:56,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:58:56,704 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 174 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:56,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 51 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:58:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-03-20 17:58:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 215. [2022-03-20 17:58:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.2380952380952381) internal successors, (260), 210 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 264 transitions. [2022-03-20 17:58:56,868 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 264 transitions. Word has length 75 [2022-03-20 17:58:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:56,868 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 264 transitions. [2022-03-20 17:58:56,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 264 transitions. [2022-03-20 17:58:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 17:58:56,869 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:56,869 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:56,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-20 17:58:57,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 17:58:57,079 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 7 times [2022-03-20 17:58:57,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:57,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1958668629] [2022-03-20 17:58:57,081 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:57,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 8 times [2022-03-20 17:58:57,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:57,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191073129] [2022-03-20 17:58:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:57,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:57,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 17:58:57,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:57,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191073129] [2022-03-20 17:58:57,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191073129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:57,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760778367] [2022-03-20 17:58:57,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:57,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:57,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:57,164 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) [2022-03-20 17:58:57,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 17:58:57,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:57,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:57,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:58:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:57,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-20 17:58:57,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:57,887 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:58:57,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-03-20 17:58:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 17:58:57,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760778367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:57,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:57,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2022-03-20 17:58:57,947 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:57,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1958668629] [2022-03-20 17:58:57,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1958668629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:57,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:57,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:58:57,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621956309] [2022-03-20 17:58:57,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:57,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:58:57,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:57,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:58:57,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:58:57,948 INFO L87 Difference]: Start difference. First operand 215 states and 264 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:58,838 INFO L93 Difference]: Finished difference Result 954 states and 1201 transitions. [2022-03-20 17:58:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:58:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-20 17:58:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:58,842 INFO L225 Difference]: With dead ends: 954 [2022-03-20 17:58:58,842 INFO L226 Difference]: Without dead ends: 880 [2022-03-20 17:58:58,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-03-20 17:58:58,843 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:58,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 104 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:58:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-03-20 17:58:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 217. [2022-03-20 17:58:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.240566037735849) internal successors, (263), 212 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 267 transitions. [2022-03-20 17:58:59,001 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 267 transitions. Word has length 79 [2022-03-20 17:58:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:59,002 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 267 transitions. [2022-03-20 17:58:59,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 267 transitions. [2022-03-20 17:58:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 17:58:59,002 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:59,002 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:59,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 17:58:59,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 17:58:59,203 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 9 times [2022-03-20 17:58:59,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:59,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807552452] [2022-03-20 17:58:59,205 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:59,205 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:59,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 10 times [2022-03-20 17:58:59,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:59,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250886056] [2022-03-20 17:58:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:59,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:59,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 17:58:59,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:59,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250886056] [2022-03-20 17:58:59,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250886056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:59,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420717538] [2022-03-20 17:58:59,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:59,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:59,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:59,310 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) [2022-03-20 17:58:59,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 17:58:59,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:59,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:59,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:58:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:59,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:58:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-20 17:58:59,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:00,033 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:59:00,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-03-20 17:59:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 17:59:00,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420717538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:00,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:00,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 24 [2022-03-20 17:59:00,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:00,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807552452] [2022-03-20 17:59:00,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807552452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:00,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:00,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:59:00,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575152492] [2022-03-20 17:59:00,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:00,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:59:00,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:00,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:59:00,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:59:00,094 INFO L87 Difference]: Start difference. First operand 217 states and 267 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:01,284 INFO L93 Difference]: Finished difference Result 1130 states and 1424 transitions. [2022-03-20 17:59:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:59:01,284 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-20 17:59:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:01,287 INFO L225 Difference]: With dead ends: 1130 [2022-03-20 17:59:01,287 INFO L226 Difference]: Without dead ends: 1056 [2022-03-20 17:59:01,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-03-20 17:59:01,288 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 161 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:01,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 128 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:59:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-03-20 17:59:01,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 219. [2022-03-20 17:59:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.2429906542056075) internal successors, (266), 214 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 270 transitions. [2022-03-20 17:59:01,459 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 270 transitions. Word has length 81 [2022-03-20 17:59:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:01,459 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 270 transitions. [2022-03-20 17:59:01,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 270 transitions. [2022-03-20 17:59:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 17:59:01,459 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:01,460 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:59:01,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-20 17:59:01,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-20 17:59:01,668 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash 18898786, now seen corresponding path program 11 times [2022-03-20 17:59:01,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:01,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350676819] [2022-03-20 17:59:01,670 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:01,670 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:01,670 INFO L85 PathProgramCache]: Analyzing trace with hash 18898786, now seen corresponding path program 12 times [2022-03-20 17:59:01,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:01,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256512378] [2022-03-20 17:59:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:01,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:01,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 17:59:01,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256512378] [2022-03-20 17:59:01,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256512378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:01,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387214430] [2022-03-20 17:59:01,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:59:01,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:01,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:01,786 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) [2022-03-20 17:59:01,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 17:59:01,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:59:01,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 17:59:01,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-03-20 17:59:02,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:59:02,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387214430] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:02,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:59:02,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-03-20 17:59:02,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:02,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350676819] [2022-03-20 17:59:02,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350676819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:02,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:02,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:59:02,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131388764] [2022-03-20 17:59:02,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:02,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:59:02,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:02,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:59:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:59:02,238 INFO L87 Difference]: Start difference. First operand 219 states and 270 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:02,572 INFO L93 Difference]: Finished difference Result 374 states and 462 transitions. [2022-03-20 17:59:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:59:02,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 17:59:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:02,573 INFO L225 Difference]: With dead ends: 374 [2022-03-20 17:59:02,573 INFO L226 Difference]: Without dead ends: 298 [2022-03-20 17:59:02,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:59:02,574 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:02,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 110 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-03-20 17:59:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-20 17:59:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2022-03-20 17:59:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2341463414634146) internal successors, (253), 205 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 257 transitions. [2022-03-20 17:59:02,748 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 257 transitions. Word has length 83 [2022-03-20 17:59:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:02,749 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 257 transitions. [2022-03-20 17:59:02,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 257 transitions. [2022-03-20 17:59:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:59:02,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:02,750 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 6, 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, 1, 1] [2022-03-20 17:59:02,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 17:59:02,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:02,972 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash -485839224, now seen corresponding path program 1 times [2022-03-20 17:59:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:02,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1431854338] [2022-03-20 17:59:02,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:02,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash -485839224, now seen corresponding path program 2 times [2022-03-20 17:59:02,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:02,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676526294] [2022-03-20 17:59:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:02,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:03,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 17:59:03,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:03,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676526294] [2022-03-20 17:59:03,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676526294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:03,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207267070] [2022-03-20 17:59:03,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:59:03,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:03,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:03,413 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) [2022-03-20 17:59:03,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 17:59:03,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:59:03,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 17:59:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:04,247 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:59:04,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 17:59:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 17:59:04,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:04,653 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 17:59:04,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 17:59:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 17:59:04,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207267070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:04,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:04,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 39 [2022-03-20 17:59:04,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1431854338] [2022-03-20 17:59:04,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1431854338] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:04,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:04,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 17:59:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383582644] [2022-03-20 17:59:04,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:04,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 17:59:04,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 17:59:04,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 17:59:04,920 INFO L87 Difference]: Start difference. First operand 210 states and 257 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:06,101 INFO L93 Difference]: Finished difference Result 265 states and 328 transitions. [2022-03-20 17:59:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:59:06,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 17:59:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:06,102 INFO L225 Difference]: With dead ends: 265 [2022-03-20 17:59:06,102 INFO L226 Difference]: Without dead ends: 226 [2022-03-20 17:59:06,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 17:59:06,103 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 139 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:06,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 113 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:59:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-20 17:59:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-03-20 17:59:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.2363636363636363) internal successors, (272), 220 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:06,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2022-03-20 17:59:06,300 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 102 [2022-03-20 17:59:06,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:06,300 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2022-03-20 17:59:06,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2022-03-20 17:59:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:59:06,301 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:06,301 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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, 1, 1, 1] [2022-03-20 17:59:06,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 17:59:06,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 17:59:06,504 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:06,504 INFO L85 PathProgramCache]: Analyzing trace with hash -878866234, now seen corresponding path program 1 times [2022-03-20 17:59:06,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:06,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1359680299] [2022-03-20 17:59:06,506 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:06,506 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:06,506 INFO L85 PathProgramCache]: Analyzing trace with hash -878866234, now seen corresponding path program 2 times [2022-03-20 17:59:06,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:06,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190026106] [2022-03-20 17:59:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:06,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:06,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 26 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-03-20 17:59:06,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:06,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190026106] [2022-03-20 17:59:06,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190026106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:06,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384337875] [2022-03-20 17:59:06,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:59:06,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:06,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:06,837 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) [2022-03-20 17:59:06,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 17:59:06,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:59:06,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:06,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 17:59:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:07,576 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:59:07,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 17:59:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 17:59:07,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:07,960 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 17:59:07,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 17:59:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 17:59:08,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384337875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:08,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:08,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 35 [2022-03-20 17:59:08,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:08,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1359680299] [2022-03-20 17:59:08,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1359680299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:08,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:08,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:59:08,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397578972] [2022-03-20 17:59:08,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:08,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:59:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:08,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:59:08,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:59:08,132 INFO L87 Difference]: Start difference. First operand 225 states and 276 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:08,792 INFO L93 Difference]: Finished difference Result 283 states and 350 transitions. [2022-03-20 17:59:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:59:08,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 17:59:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:08,793 INFO L225 Difference]: With dead ends: 283 [2022-03-20 17:59:08,793 INFO L226 Difference]: Without dead ends: 229 [2022-03-20 17:59:08,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=1665, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 17:59:08,796 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 131 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:08,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 73 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:59:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-20 17:59:08,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-03-20 17:59:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.2331838565022422) internal successors, (275), 223 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2022-03-20 17:59:08,981 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 102 [2022-03-20 17:59:08,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:08,981 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2022-03-20 17:59:08,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2022-03-20 17:59:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:59:08,982 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:08,982 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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, 1, 1, 1] [2022-03-20 17:59:09,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 17:59:09,195 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,SelfDestructingSolverStorable49 [2022-03-20 17:59:09,195 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash -345290614, now seen corresponding path program 3 times [2022-03-20 17:59:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:09,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1622667219] [2022-03-20 17:59:09,197 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:09,197 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash -345290614, now seen corresponding path program 4 times [2022-03-20 17:59:09,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:09,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813805376] [2022-03-20 17:59:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:09,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:09,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 17:59:09,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:09,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813805376] [2022-03-20 17:59:09,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813805376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:09,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758431974] [2022-03-20 17:59:09,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:59:09,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:09,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:09,636 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) [2022-03-20 17:59:09,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 17:59:09,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:59:09,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:09,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 17:59:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:10,375 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:59:10,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 17:59:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 17:59:10,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:10,743 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 17:59:10,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 17:59:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 17:59:10,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758431974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:10,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:10,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 12] total 38 [2022-03-20 17:59:10,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:10,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1622667219] [2022-03-20 17:59:10,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1622667219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:10,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:10,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 17:59:10,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432311509] [2022-03-20 17:59:10,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:10,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 17:59:10,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:10,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 17:59:10,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:59:10,889 INFO L87 Difference]: Start difference. First operand 228 states and 279 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:11,899 INFO L93 Difference]: Finished difference Result 301 states and 372 transitions. [2022-03-20 17:59:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:59:11,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 17:59:11,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:11,900 INFO L225 Difference]: With dead ends: 301 [2022-03-20 17:59:11,900 INFO L226 Difference]: Without dead ends: 244 [2022-03-20 17:59:11,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=2402, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 17:59:11,901 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 121 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:11,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 110 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:59:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-20 17:59:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 228. [2022-03-20 17:59:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.2331838565022422) internal successors, (275), 223 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2022-03-20 17:59:12,093 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 102 [2022-03-20 17:59:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:12,094 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2022-03-20 17:59:12,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2022-03-20 17:59:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:59:12,095 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:12,095 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 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, 1, 1] [2022-03-20 17:59:12,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 17:59:12,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:12,311 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash -738317624, now seen corresponding path program 5 times [2022-03-20 17:59:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2098997395] [2022-03-20 17:59:12,313 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:12,313 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash -738317624, now seen corresponding path program 6 times [2022-03-20 17:59:12,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:12,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274685983] [2022-03-20 17:59:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:12,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:12,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 17:59:12,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:12,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274685983] [2022-03-20 17:59:12,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274685983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:12,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448490496] [2022-03-20 17:59:12,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:59:12,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:12,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:12,736 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) [2022-03-20 17:59:12,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 17:59:13,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 17:59:13,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 17:59:13,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:16,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:59:16,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:59:16,296 INFO L356 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-03-20 17:59:16,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 28 [2022-03-20 17:59:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 110 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 17:59:16,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:18,725 INFO L356 Elim1Store]: treesize reduction 166, result has 26.2 percent of original size [2022-03-20 17:59:18,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 74 [2022-03-20 17:59:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 103 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 17:59:18,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448490496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:18,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:18,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 22] total 57 [2022-03-20 17:59:18,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:18,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2098997395] [2022-03-20 17:59:18,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2098997395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:18,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:18,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:59:18,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628589064] [2022-03-20 17:59:18,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:18,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:59:18,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:18,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:59:18,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=2757, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 17:59:18,873 INFO L87 Difference]: Start difference. First operand 228 states and 279 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:19,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:19,944 INFO L93 Difference]: Finished difference Result 298 states and 368 transitions. [2022-03-20 17:59:19,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 17:59:19,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 17:59:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:19,945 INFO L225 Difference]: With dead ends: 298 [2022-03-20 17:59:19,945 INFO L226 Difference]: Without dead ends: 241 [2022-03-20 17:59:19,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=624, Invalid=4206, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 17:59:19,946 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 137 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:19,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 96 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:59:19,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-20 17:59:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-03-20 17:59:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2340425531914894) internal successors, (290), 235 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 294 transitions. [2022-03-20 17:59:20,138 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 294 transitions. Word has length 102 [2022-03-20 17:59:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:20,138 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 294 transitions. [2022-03-20 17:59:20,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 294 transitions. [2022-03-20 17:59:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:59:20,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:20,139 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 17:59:20,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 17:59:20,344 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,SelfDestructingSolverStorable51 [2022-03-20 17:59:20,344 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:20,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1325123638, now seen corresponding path program 7 times [2022-03-20 17:59:20,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:20,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133634095] [2022-03-20 17:59:20,345 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:20,345 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1325123638, now seen corresponding path program 8 times [2022-03-20 17:59:20,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:20,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951940626] [2022-03-20 17:59:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:20,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:20,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-03-20 17:59:20,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:20,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951940626] [2022-03-20 17:59:20,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951940626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:20,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892890644] [2022-03-20 17:59:20,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:59:20,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:20,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:20,772 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) [2022-03-20 17:59:20,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 17:59:20,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:59:20,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:20,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 17:59:20,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:21,500 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:59:21,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 17:59:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 17:59:21,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:21,931 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 17:59:21,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 17:59:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 17:59:22,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892890644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:22,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:22,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 37 [2022-03-20 17:59:22,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [133634095] [2022-03-20 17:59:22,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [133634095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:22,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:22,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:59:22,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995658434] [2022-03-20 17:59:22,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:22,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:59:22,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:59:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 17:59:22,105 INFO L87 Difference]: Start difference. First operand 240 states and 294 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:22,941 INFO L93 Difference]: Finished difference Result 321 states and 396 transitions. [2022-03-20 17:59:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:59:22,942 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 17:59:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:22,943 INFO L225 Difference]: With dead ends: 321 [2022-03-20 17:59:22,943 INFO L226 Difference]: Without dead ends: 252 [2022-03-20 17:59:22,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 17:59:22,944 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 122 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:22,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 89 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:59:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-20 17:59:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2022-03-20 17:59:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2254098360655739) internal successors, (299), 244 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 303 transitions. [2022-03-20 17:59:23,143 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 303 transitions. Word has length 102 [2022-03-20 17:59:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:23,144 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 303 transitions. [2022-03-20 17:59:23,144 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 303 transitions. [2022-03-20 17:59:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:59:23,145 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:23,145 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 17:59:23,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 17:59:23,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:23,359 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:23,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:23,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1948775304, now seen corresponding path program 9 times [2022-03-20 17:59:23,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:23,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [174412227] [2022-03-20 17:59:23,361 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:23,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1948775304, now seen corresponding path program 10 times [2022-03-20 17:59:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:23,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664005018] [2022-03-20 17:59:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:23,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:23,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-20 17:59:23,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:23,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664005018] [2022-03-20 17:59:23,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664005018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:23,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529803480] [2022-03-20 17:59:23,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:59:23,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:23,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:23,748 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) [2022-03-20 17:59:23,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 17:59:23,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:59:23,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:23,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 17:59:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:24,425 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:59:24,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 17:59:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 17:59:24,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:24,768 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 17:59:24,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 17:59:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 17:59:24,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529803480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:24,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:24,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 35 [2022-03-20 17:59:24,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [174412227] [2022-03-20 17:59:24,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [174412227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:24,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:24,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:59:24,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706684661] [2022-03-20 17:59:24,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:24,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:59:24,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:59:24,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:59:24,901 INFO L87 Difference]: Start difference. First operand 249 states and 303 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:25,656 INFO L93 Difference]: Finished difference Result 339 states and 414 transitions. [2022-03-20 17:59:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:59:25,656 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 17:59:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:25,657 INFO L225 Difference]: With dead ends: 339 [2022-03-20 17:59:25,657 INFO L226 Difference]: Without dead ends: 261 [2022-03-20 17:59:25,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 17:59:25,658 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 111 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:25,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 77 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:59:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-20 17:59:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2022-03-20 17:59:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.2173913043478262) internal successors, (308), 253 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 312 transitions. [2022-03-20 17:59:25,861 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 312 transitions. Word has length 102 [2022-03-20 17:59:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:25,861 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 312 transitions. [2022-03-20 17:59:25,861 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 312 transitions. [2022-03-20 17:59:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:59:25,862 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:25,862 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 17:59:25,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 17:59:26,083 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,SelfDestructingSolverStorable53 [2022-03-20 17:59:26,083 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1280899916, now seen corresponding path program 11 times [2022-03-20 17:59:26,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:26,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1387289562] [2022-03-20 17:59:26,085 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:26,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:26,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1280899916, now seen corresponding path program 12 times [2022-03-20 17:59:26,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:26,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446918191] [2022-03-20 17:59:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:26,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:26,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-03-20 17:59:26,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:26,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446918191] [2022-03-20 17:59:26,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446918191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:26,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639940106] [2022-03-20 17:59:26,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:59:26,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:26,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:26,472 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) [2022-03-20 17:59:26,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 17:59:27,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 17:59:27,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:27,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 17:59:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:59:27,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:59:27,993 INFO L356 Elim1Store]: treesize reduction 76, result has 26.9 percent of original size [2022-03-20 17:59:27,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 44 [2022-03-20 17:59:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 82 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-20 17:59:28,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:29,386 INFO L356 Elim1Store]: treesize reduction 116, result has 52.7 percent of original size [2022-03-20 17:59:29,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 144 [2022-03-20 17:59:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 131 proven. 38 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-03-20 17:59:31,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639940106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:31,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:31,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 51 [2022-03-20 17:59:31,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:31,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1387289562] [2022-03-20 17:59:31,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1387289562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:31,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:31,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:59:31,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270461710] [2022-03-20 17:59:31,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:31,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:59:31,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:31,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:59:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2282, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 17:59:31,189 INFO L87 Difference]: Start difference. First operand 258 states and 312 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:32,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:32,142 INFO L93 Difference]: Finished difference Result 357 states and 432 transitions. [2022-03-20 17:59:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:59:32,143 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 17:59:32,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:32,144 INFO L225 Difference]: With dead ends: 357 [2022-03-20 17:59:32,144 INFO L226 Difference]: Without dead ends: 270 [2022-03-20 17:59:32,145 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 17:59:32,145 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 111 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:32,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 90 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:59:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-20 17:59:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 258. [2022-03-20 17:59:32,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.2173913043478262) internal successors, (308), 253 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 312 transitions. [2022-03-20 17:59:32,367 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 312 transitions. Word has length 102 [2022-03-20 17:59:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:32,367 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 312 transitions. [2022-03-20 17:59:32,367 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:32,367 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 312 transitions. [2022-03-20 17:59:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:59:32,367 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:32,368 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 17:59:32,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-20 17:59:32,568 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,SelfDestructingSolverStorable54 [2022-03-20 17:59:32,568 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash 259831562, now seen corresponding path program 13 times [2022-03-20 17:59:32,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:32,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1720758932] [2022-03-20 17:59:32,569 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:32,569 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash 259831562, now seen corresponding path program 14 times [2022-03-20 17:59:32,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:32,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597207342] [2022-03-20 17:59:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:32,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:32,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-03-20 17:59:32,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:32,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597207342] [2022-03-20 17:59:32,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597207342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:32,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531176601] [2022-03-20 17:59:32,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:59:32,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:32,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:32,892 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) [2022-03-20 17:59:32,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 17:59:33,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:59:33,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 17:59:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:33,653 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:59:33,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 17:59:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 17:59:33,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:34,048 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 17:59:34,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 17:59:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 17:59:34,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531176601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:34,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:34,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 35 [2022-03-20 17:59:34,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:34,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1720758932] [2022-03-20 17:59:34,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1720758932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:34,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:34,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:59:34,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528689107] [2022-03-20 17:59:34,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:34,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:59:34,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:59:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:59:34,202 INFO L87 Difference]: Start difference. First operand 258 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:34,864 INFO L93 Difference]: Finished difference Result 342 states and 414 transitions. [2022-03-20 17:59:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:59:34,864 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 17:59:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:34,865 INFO L225 Difference]: With dead ends: 342 [2022-03-20 17:59:34,865 INFO L226 Difference]: Without dead ends: 255 [2022-03-20 17:59:34,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1757, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 17:59:34,865 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 85 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:34,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 82 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:59:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-20 17:59:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-03-20 17:59:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.216) internal successors, (304), 250 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 308 transitions. [2022-03-20 17:59:35,067 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 308 transitions. Word has length 102 [2022-03-20 17:59:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:35,067 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 308 transitions. [2022-03-20 17:59:35,067 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:35,067 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 308 transitions. [2022-03-20 17:59:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:59:35,067 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:35,068 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 17:59:35,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 17:59:35,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:35,291 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:35,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:35,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2127337274, now seen corresponding path program 15 times [2022-03-20 17:59:35,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:35,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1784269071] [2022-03-20 17:59:35,292 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:35,292 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:35,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2127337274, now seen corresponding path program 16 times [2022-03-20 17:59:35,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:35,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404235554] [2022-03-20 17:59:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:35,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:35,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-20 17:59:35,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404235554] [2022-03-20 17:59:35,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404235554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710185465] [2022-03-20 17:59:35,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:59:35,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:35,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:35,680 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) [2022-03-20 17:59:35,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 17:59:35,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:59:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 17:59:35,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:36,440 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:59:36,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 17:59:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 17:59:36,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:36,783 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 17:59:36,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 17:59:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 17:59:36,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710185465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:36,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:36,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 35 [2022-03-20 17:59:36,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:36,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1784269071] [2022-03-20 17:59:36,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1784269071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:36,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:36,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:59:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891382304] [2022-03-20 17:59:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:36,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:59:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:36,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:59:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:59:36,900 INFO L87 Difference]: Start difference. First operand 255 states and 308 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:37,613 INFO L93 Difference]: Finished difference Result 336 states and 406 transitions. [2022-03-20 17:59:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:59:37,614 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 17:59:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:37,615 INFO L225 Difference]: With dead ends: 336 [2022-03-20 17:59:37,615 INFO L226 Difference]: Without dead ends: 252 [2022-03-20 17:59:37,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1854, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 17:59:37,616 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 85 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:37,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 87 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:59:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-20 17:59:37,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-03-20 17:59:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.214574898785425) internal successors, (300), 247 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 304 transitions. [2022-03-20 17:59:37,833 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 304 transitions. Word has length 102 [2022-03-20 17:59:37,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:37,833 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 304 transitions. [2022-03-20 17:59:37,833 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:37,833 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 304 transitions. [2022-03-20 17:59:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:59:37,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:37,834 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 17:59:37,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 17:59:38,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:38,035 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1499754634, now seen corresponding path program 17 times [2022-03-20 17:59:38,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:38,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [100236835] [2022-03-20 17:59:38,036 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:38,036 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1499754634, now seen corresponding path program 18 times [2022-03-20 17:59:38,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:38,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722222888] [2022-03-20 17:59:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:38,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:38,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-03-20 17:59:38,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:38,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722222888] [2022-03-20 17:59:38,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722222888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:38,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448267832] [2022-03-20 17:59:38,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:59:38,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:38,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:38,464 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) [2022-03-20 17:59:38,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 17:59:39,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 17:59:39,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 17:59:39,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:39,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-20 17:59:55,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:59:55,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:59:55,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:59:55,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:59:55,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:59:55,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:59:55,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:59:55,643 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-20 17:59:55,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 24 [2022-03-20 17:59:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 87 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-03-20 17:59:55,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 128 proven. 75 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-20 18:00:02,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448267832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:02,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:02,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 31, 32] total 74 [2022-03-20 18:00:02,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:02,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [100236835] [2022-03-20 18:00:02,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [100236835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:02,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:02,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:00:02,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944914489] [2022-03-20 18:00:02,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:02,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:00:02,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:02,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:00:02,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=4589, Unknown=9, NotChecked=0, Total=5402 [2022-03-20 18:00:02,972 INFO L87 Difference]: Start difference. First operand 252 states and 304 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:03,981 INFO L93 Difference]: Finished difference Result 333 states and 401 transitions. [2022-03-20 18:00:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:00:03,981 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:03,982 INFO L225 Difference]: With dead ends: 333 [2022-03-20 18:00:03,982 INFO L226 Difference]: Without dead ends: 252 [2022-03-20 18:00:03,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2354 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=978, Invalid=6323, Unknown=9, NotChecked=0, Total=7310 [2022-03-20 18:00:03,983 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 89 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:03,983 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 76 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:00:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-20 18:00:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-03-20 18:00:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.2105263157894737) internal successors, (299), 247 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 303 transitions. [2022-03-20 18:00:04,204 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 303 transitions. Word has length 102 [2022-03-20 18:00:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:04,204 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 303 transitions. [2022-03-20 18:00:04,205 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 303 transitions. [2022-03-20 18:00:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:04,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:04,205 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 18:00:04,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-20 18:00:04,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:04,406 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:04,406 INFO L85 PathProgramCache]: Analyzing trace with hash 478686280, now seen corresponding path program 19 times [2022-03-20 18:00:04,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:04,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [253568615] [2022-03-20 18:00:04,407 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:04,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:04,407 INFO L85 PathProgramCache]: Analyzing trace with hash 478686280, now seen corresponding path program 20 times [2022-03-20 18:00:04,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:04,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028709054] [2022-03-20 18:00:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:04,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:04,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-03-20 18:00:04,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:04,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028709054] [2022-03-20 18:00:04,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028709054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:04,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265281705] [2022-03-20 18:00:04,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:04,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:04,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:04,829 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) [2022-03-20 18:00:04,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 18:00:05,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:05,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:05,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:00:05,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:05,604 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 18:00:05,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 18:00:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:00:05,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:06,011 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 18:00:06,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 18:00:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:00:06,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265281705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:06,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:06,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 33 [2022-03-20 18:00:06,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:06,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [253568615] [2022-03-20 18:00:06,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [253568615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:06,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:06,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:00:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108691362] [2022-03-20 18:00:06,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:06,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:00:06,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:00:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:00:06,162 INFO L87 Difference]: Start difference. First operand 252 states and 303 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:06,763 INFO L93 Difference]: Finished difference Result 340 states and 408 transitions. [2022-03-20 18:00:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 18:00:06,764 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:06,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:06,764 INFO L225 Difference]: With dead ends: 340 [2022-03-20 18:00:06,764 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 18:00:06,765 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 18:00:06,765 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 66 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:06,766 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 59 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:00:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 18:00:07,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2022-03-20 18:00:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.209486166007905) internal successors, (306), 253 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 310 transitions. [2022-03-20 18:00:07,013 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 310 transitions. Word has length 102 [2022-03-20 18:00:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:07,013 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 310 transitions. [2022-03-20 18:00:07,013 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 310 transitions. [2022-03-20 18:00:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:07,014 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:07,014 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 18:00:07,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 18:00:07,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 18:00:07,215 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 196615876, now seen corresponding path program 21 times [2022-03-20 18:00:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:07,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [639240892] [2022-03-20 18:00:07,216 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:07,216 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash 196615876, now seen corresponding path program 22 times [2022-03-20 18:00:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:07,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001135025] [2022-03-20 18:00:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:07,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:07,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 18:00:07,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:07,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001135025] [2022-03-20 18:00:07,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001135025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:07,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337921902] [2022-03-20 18:00:07,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:07,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:07,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:07,652 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) [2022-03-20 18:00:07,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 18:00:07,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:07,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:07,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 18:00:07,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:08,453 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:00:08,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 18:00:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:00:08,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:08,836 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 18:00:08,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 18:00:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:00:08,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337921902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:08,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:08,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-03-20 18:00:08,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:08,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [639240892] [2022-03-20 18:00:08,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [639240892] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:08,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:08,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:00:08,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636095472] [2022-03-20 18:00:08,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:08,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:00:08,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:08,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:00:08,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:00:08,968 INFO L87 Difference]: Start difference. First operand 258 states and 310 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:10,016 INFO L93 Difference]: Finished difference Result 346 states and 414 transitions. [2022-03-20 18:00:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:00:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:10,017 INFO L225 Difference]: With dead ends: 346 [2022-03-20 18:00:10,018 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 18:00:10,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=2301, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:00:10,019 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 159 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:10,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 95 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:00:10,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 18:00:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 249. [2022-03-20 18:00:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2131147540983607) internal successors, (296), 244 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2022-03-20 18:00:10,235 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 102 [2022-03-20 18:00:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:10,235 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2022-03-20 18:00:10,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2022-03-20 18:00:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:10,236 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:10,236 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 18:00:10,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:10,436 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,SelfDestructingSolverStorable59 [2022-03-20 18:00:10,437 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:10,437 INFO L85 PathProgramCache]: Analyzing trace with hash -390190138, now seen corresponding path program 23 times [2022-03-20 18:00:10,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:10,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2106657944] [2022-03-20 18:00:10,438 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:10,438 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:10,438 INFO L85 PathProgramCache]: Analyzing trace with hash -390190138, now seen corresponding path program 24 times [2022-03-20 18:00:10,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:10,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669276756] [2022-03-20 18:00:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:10,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-03-20 18:00:10,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:10,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669276756] [2022-03-20 18:00:10,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669276756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:10,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159709597] [2022-03-20 18:00:10,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:10,783 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) [2022-03-20 18:00:10,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 18:00:11,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 18:00:11,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 18:00:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:12,343 INFO L356 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2022-03-20 18:00:12,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 43 [2022-03-20 18:00:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 103 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 18:00:12,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:13,448 INFO L356 Elim1Store]: treesize reduction 122, result has 52.2 percent of original size [2022-03-20 18:00:13,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 148 [2022-03-20 18:00:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 108 proven. 77 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 18:00:15,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159709597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:15,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:15,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 49 [2022-03-20 18:00:15,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:15,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2106657944] [2022-03-20 18:00:15,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2106657944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:15,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:15,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:00:15,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210868979] [2022-03-20 18:00:15,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:15,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:00:15,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:15,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:00:15,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2114, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:00:15,960 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:16,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:16,751 INFO L93 Difference]: Finished difference Result 327 states and 393 transitions. [2022-03-20 18:00:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:00:16,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:16,752 INFO L225 Difference]: With dead ends: 327 [2022-03-20 18:00:16,752 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 18:00:16,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=328, Invalid=3094, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 18:00:16,753 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 152 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:16,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 69 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:00:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 18:00:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-03-20 18:00:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.209016393442623) internal successors, (295), 244 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 299 transitions. [2022-03-20 18:00:16,956 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 299 transitions. Word has length 102 [2022-03-20 18:00:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:16,956 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 299 transitions. [2022-03-20 18:00:16,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 299 transitions. [2022-03-20 18:00:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:16,956 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:16,956 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 18:00:16,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:17,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:17,157 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:17,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:17,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1517608322, now seen corresponding path program 25 times [2022-03-20 18:00:17,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:17,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [45664770] [2022-03-20 18:00:17,158 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:17,158 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:17,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1517608322, now seen corresponding path program 26 times [2022-03-20 18:00:17,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:17,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436110457] [2022-03-20 18:00:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:17,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:17,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-20 18:00:17,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436110457] [2022-03-20 18:00:17,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436110457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056743323] [2022-03-20 18:00:17,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:17,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:17,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:17,556 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) [2022-03-20 18:00:17,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 18:00:17,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:17,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:17,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:00:17,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:18,350 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 18:00:18,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 18:00:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:00:18,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:18,808 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 18:00:18,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 18:00:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:00:18,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056743323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:18,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:18,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2022-03-20 18:00:18,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:18,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [45664770] [2022-03-20 18:00:18,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [45664770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:18,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:18,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:00:18,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489487772] [2022-03-20 18:00:18,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:18,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:00:18,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:00:18,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:00:18,961 INFO L87 Difference]: Start difference. First operand 249 states and 299 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:19,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:19,770 INFO L93 Difference]: Finished difference Result 327 states and 391 transitions. [2022-03-20 18:00:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:00:19,770 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:19,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:19,771 INFO L225 Difference]: With dead ends: 327 [2022-03-20 18:00:19,771 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 18:00:19,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 18:00:19,772 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:19,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 70 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:00:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 18:00:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-03-20 18:00:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 244 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2022-03-20 18:00:19,981 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 102 [2022-03-20 18:00:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:19,982 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2022-03-20 18:00:19,982 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2022-03-20 18:00:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:19,982 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:19,982 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 18:00:20,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-20 18:00:20,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:20,183 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash 849732934, now seen corresponding path program 27 times [2022-03-20 18:00:20,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:20,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1884761146] [2022-03-20 18:00:20,184 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:20,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:20,185 INFO L85 PathProgramCache]: Analyzing trace with hash 849732934, now seen corresponding path program 28 times [2022-03-20 18:00:20,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:20,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475541747] [2022-03-20 18:00:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:20,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:20,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-03-20 18:00:20,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:20,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475541747] [2022-03-20 18:00:20,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475541747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:20,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764134039] [2022-03-20 18:00:20,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:20,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:20,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:20,612 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) [2022-03-20 18:00:20,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 18:00:20,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:20,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 18:00:20,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:21,440 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:00:21,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 18:00:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:00:21,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:21,822 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 18:00:21,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 18:00:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:00:21,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764134039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:21,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:21,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 36 [2022-03-20 18:00:21,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1884761146] [2022-03-20 18:00:21,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1884761146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:21,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:21,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:00:21,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253418569] [2022-03-20 18:00:21,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:21,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:00:21,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:00:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:00:21,961 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:22,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:22,880 INFO L93 Difference]: Finished difference Result 328 states and 390 transitions. [2022-03-20 18:00:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:00:22,880 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:22,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:22,881 INFO L225 Difference]: With dead ends: 328 [2022-03-20 18:00:22,881 INFO L226 Difference]: Without dead ends: 250 [2022-03-20 18:00:22,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:00:22,882 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 99 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:22,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 87 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:00:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-20 18:00:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2022-03-20 18:00:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2085106382978723) internal successors, (284), 235 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 288 transitions. [2022-03-20 18:00:23,107 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 288 transitions. Word has length 102 [2022-03-20 18:00:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:23,108 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 288 transitions. [2022-03-20 18:00:23,108 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 288 transitions. [2022-03-20 18:00:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:23,108 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:23,108 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 18:00:23,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-20 18:00:23,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:23,310 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash -171335420, now seen corresponding path program 29 times [2022-03-20 18:00:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:23,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1314999449] [2022-03-20 18:00:23,311 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:23,311 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash -171335420, now seen corresponding path program 30 times [2022-03-20 18:00:23,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:23,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825386193] [2022-03-20 18:00:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:23,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 26 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-03-20 18:00:23,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:23,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825386193] [2022-03-20 18:00:23,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825386193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:23,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819808862] [2022-03-20 18:00:23,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:23,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:23,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:23,732 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) [2022-03-20 18:00:23,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 18:00:24,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 18:00:24,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:24,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 18:00:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:25,231 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-03-20 18:00:25,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2022-03-20 18:00:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 104 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 18:00:25,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:26,123 INFO L356 Elim1Store]: treesize reduction 114, result has 49.3 percent of original size [2022-03-20 18:00:26,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 126 [2022-03-20 18:00:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 130 proven. 55 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 18:00:26,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819808862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:26,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:26,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 20] total 49 [2022-03-20 18:00:26,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:26,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1314999449] [2022-03-20 18:00:26,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1314999449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:26,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:26,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:00:26,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592584453] [2022-03-20 18:00:26,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:26,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:00:26,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:26,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:00:26,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:00:26,266 INFO L87 Difference]: Start difference. First operand 240 states and 288 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:26,989 INFO L93 Difference]: Finished difference Result 313 states and 374 transitions. [2022-03-20 18:00:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 18:00:26,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:26,990 INFO L225 Difference]: With dead ends: 313 [2022-03-20 18:00:26,990 INFO L226 Difference]: Without dead ends: 244 [2022-03-20 18:00:26,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=400, Invalid=2906, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:00:26,991 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 103 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:26,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 64 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:00:26,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-20 18:00:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-03-20 18:00:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-03-20 18:00:27,206 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-03-20 18:00:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:27,207 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-03-20 18:00:27,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-03-20 18:00:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:27,207 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:27,208 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 18:00:27,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:27,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:27,408 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:27,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:27,408 INFO L85 PathProgramCache]: Analyzing trace with hash 730191496, now seen corresponding path program 31 times [2022-03-20 18:00:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:27,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1002747957] [2022-03-20 18:00:27,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:27,410 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:27,410 INFO L85 PathProgramCache]: Analyzing trace with hash 730191496, now seen corresponding path program 32 times [2022-03-20 18:00:27,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:27,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004911362] [2022-03-20 18:00:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:27,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 18:00:27,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:27,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004911362] [2022-03-20 18:00:27,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004911362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:27,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036411839] [2022-03-20 18:00:27,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:27,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:27,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:27,766 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) [2022-03-20 18:00:27,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 18:00:27,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:27,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:27,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:00:27,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:28,578 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 18:00:28,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 18:00:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:00:28,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:28,997 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 18:00:28,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 18:00:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:00:29,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036411839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:29,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:29,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 39 [2022-03-20 18:00:29,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:29,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1002747957] [2022-03-20 18:00:29,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1002747957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:29,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:29,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:00:29,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461312558] [2022-03-20 18:00:29,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:29,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:00:29,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:00:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:00:29,134 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:30,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:30,183 INFO L93 Difference]: Finished difference Result 325 states and 387 transitions. [2022-03-20 18:00:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:00:30,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:30,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:30,184 INFO L225 Difference]: With dead ends: 325 [2022-03-20 18:00:30,184 INFO L226 Difference]: Without dead ends: 253 [2022-03-20 18:00:30,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:00:30,185 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 150 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:30,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 89 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:00:30,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-20 18:00:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2022-03-20 18:00:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 244 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2022-03-20 18:00:30,392 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 102 [2022-03-20 18:00:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:30,393 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2022-03-20 18:00:30,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2022-03-20 18:00:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:30,393 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:30,393 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 18:00:30,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-20 18:00:30,595 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,SelfDestructingSolverStorable64 [2022-03-20 18:00:30,596 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:30,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:30,596 INFO L85 PathProgramCache]: Analyzing trace with hash 337164486, now seen corresponding path program 33 times [2022-03-20 18:00:30,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:30,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [93745835] [2022-03-20 18:00:30,597 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:30,597 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash 337164486, now seen corresponding path program 34 times [2022-03-20 18:00:30,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:30,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884049986] [2022-03-20 18:00:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:30,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:30,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 18:00:30,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:30,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884049986] [2022-03-20 18:00:30,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884049986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:30,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493022516] [2022-03-20 18:00:30,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:30,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:30,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:30,953 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) [2022-03-20 18:00:30,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 18:00:31,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:31,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 18:00:31,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:31,658 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:00:31,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 18:00:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:00:31,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:32,042 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 18:00:32,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 18:00:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:00:32,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493022516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:32,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:32,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-03-20 18:00:32,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:32,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [93745835] [2022-03-20 18:00:32,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [93745835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:32,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:32,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:00:32,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962320798] [2022-03-20 18:00:32,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:32,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:00:32,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:32,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:00:32,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:00:32,172 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:33,100 INFO L93 Difference]: Finished difference Result 328 states and 390 transitions. [2022-03-20 18:00:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:00:33,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:33,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:33,101 INFO L225 Difference]: With dead ends: 328 [2022-03-20 18:00:33,101 INFO L226 Difference]: Without dead ends: 250 [2022-03-20 18:00:33,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=2300, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:00:33,102 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:33,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 107 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:00:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-20 18:00:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2022-03-20 18:00:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2085106382978723) internal successors, (284), 235 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 288 transitions. [2022-03-20 18:00:33,293 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 288 transitions. Word has length 102 [2022-03-20 18:00:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:33,294 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 288 transitions. [2022-03-20 18:00:33,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 288 transitions. [2022-03-20 18:00:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:33,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:33,294 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 18:00:33,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:33,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:33,495 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:33,495 INFO L85 PathProgramCache]: Analyzing trace with hash -249641528, now seen corresponding path program 35 times [2022-03-20 18:00:33,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:33,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1393433553] [2022-03-20 18:00:33,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:33,496 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash -249641528, now seen corresponding path program 36 times [2022-03-20 18:00:33,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:33,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108780748] [2022-03-20 18:00:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:33,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:33,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-03-20 18:00:33,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:33,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108780748] [2022-03-20 18:00:33,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108780748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:33,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423211164] [2022-03-20 18:00:33,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:33,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:33,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:33,899 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) [2022-03-20 18:00:33,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 18:00:34,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 18:00:34,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 18:00:34,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:34,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-20 18:00:35,158 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-03-20 18:00:35,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-03-20 18:00:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 38 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:00:35,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:00:35,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423211164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:35,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:35,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 31 [2022-03-20 18:00:35,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:35,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1393433553] [2022-03-20 18:00:35,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1393433553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:35,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:35,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:00:35,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676183094] [2022-03-20 18:00:35,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:35,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:00:35,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:00:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:00:35,545 INFO L87 Difference]: Start difference. First operand 240 states and 288 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:36,303 INFO L93 Difference]: Finished difference Result 313 states and 374 transitions. [2022-03-20 18:00:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:00:36,303 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:36,304 INFO L225 Difference]: With dead ends: 313 [2022-03-20 18:00:36,304 INFO L226 Difference]: Without dead ends: 244 [2022-03-20 18:00:36,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 18:00:36,304 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:36,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 77 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:00:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-20 18:00:36,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-03-20 18:00:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-03-20 18:00:36,501 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-03-20 18:00:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:36,501 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-03-20 18:00:36,501 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-03-20 18:00:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:36,501 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:36,501 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 18:00:36,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 18:00:36,702 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,SelfDestructingSolverStorable66 [2022-03-20 18:00:36,702 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1656977340, now seen corresponding path program 37 times [2022-03-20 18:00:36,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:36,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [334194883] [2022-03-20 18:00:36,703 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:36,703 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1656977340, now seen corresponding path program 38 times [2022-03-20 18:00:36,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:36,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959358766] [2022-03-20 18:00:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:36,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:37,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 18:00:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959358766] [2022-03-20 18:00:37,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959358766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936168245] [2022-03-20 18:00:37,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:37,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:37,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:37,068 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) [2022-03-20 18:00:37,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 18:00:37,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:37,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:37,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:00:37,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:37,918 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 18:00:37,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 18:00:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:00:37,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:38,335 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 18:00:38,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 18:00:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:00:38,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936168245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:38,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:38,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 39 [2022-03-20 18:00:38,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:38,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [334194883] [2022-03-20 18:00:38,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [334194883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:38,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:38,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:00:38,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444771847] [2022-03-20 18:00:38,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:38,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:00:38,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:38,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:00:38,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:00:38,484 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:39,603 INFO L93 Difference]: Finished difference Result 321 states and 382 transitions. [2022-03-20 18:00:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:00:39,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:39,604 INFO L225 Difference]: With dead ends: 321 [2022-03-20 18:00:39,604 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 18:00:39,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=2486, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:00:39,605 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 187 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:39,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 111 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:00:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 18:00:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2022-03-20 18:00:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-03-20 18:00:39,832 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-03-20 18:00:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:39,832 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-03-20 18:00:39,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-03-20 18:00:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:39,833 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:39,833 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 18:00:39,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-20 18:00:40,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 18:00:40,034 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2050004350, now seen corresponding path program 39 times [2022-03-20 18:00:40,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:40,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [210767381] [2022-03-20 18:00:40,036 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:40,036 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2050004350, now seen corresponding path program 40 times [2022-03-20 18:00:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867848879] [2022-03-20 18:00:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:40,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:40,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 18:00:40,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:40,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867848879] [2022-03-20 18:00:40,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867848879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:40,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784015141] [2022-03-20 18:00:40,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:40,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:40,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:40,439 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) [2022-03-20 18:00:40,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 18:00:40,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:40,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 18:00:40,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:41,178 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:00:41,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 18:00:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:00:41,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:41,552 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 18:00:41,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 18:00:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:00:41,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784015141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:41,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:41,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-03-20 18:00:41,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:41,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [210767381] [2022-03-20 18:00:41,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [210767381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:41,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:41,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:00:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781211213] [2022-03-20 18:00:41,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:41,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:00:41,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:41,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:00:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:00:41,676 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:42,685 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2022-03-20 18:00:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:00:42,686 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:42,687 INFO L225 Difference]: With dead ends: 319 [2022-03-20 18:00:42,687 INFO L226 Difference]: Without dead ends: 247 [2022-03-20 18:00:42,687 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=251, Invalid=2299, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:00:42,687 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 165 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:42,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 110 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:00:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-20 18:00:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-03-20 18:00:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-03-20 18:00:42,907 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 102 [2022-03-20 18:00:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:42,907 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-03-20 18:00:42,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-03-20 18:00:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:42,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:42,907 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 18:00:42,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-20 18:00:43,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-20 18:00:43,108 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2051183942, now seen corresponding path program 41 times [2022-03-20 18:00:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:43,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [384962155] [2022-03-20 18:00:43,109 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:43,109 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:43,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2051183942, now seen corresponding path program 42 times [2022-03-20 18:00:43,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:43,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691355273] [2022-03-20 18:00:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:43,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:43,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 18:00:43,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691355273] [2022-03-20 18:00:43,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691355273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936246174] [2022-03-20 18:00:43,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:43,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:43,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:43,525 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) [2022-03-20 18:00:43,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 18:00:45,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 18:00:45,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:45,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 18:00:45,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 109 proven. 104 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-03-20 18:00:49,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:00,668 INFO L356 Elim1Store]: treesize reduction 326, result has 28.7 percent of original size [2022-03-20 18:01:00,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 153 [2022-03-20 18:01:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 53 proven. 142 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-20 18:01:01,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936246174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:01,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:01,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 31] total 73 [2022-03-20 18:01:01,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:01,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [384962155] [2022-03-20 18:01:01,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [384962155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:01,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:01,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:01:01,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523088016] [2022-03-20 18:01:01,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:01,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:01:01,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:01:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=4465, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 18:01:01,041 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:02,311 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-03-20 18:01:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:01:02,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:02,312 INFO L225 Difference]: With dead ends: 325 [2022-03-20 18:01:02,312 INFO L226 Difference]: Without dead ends: 250 [2022-03-20 18:01:02,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1165, Invalid=6317, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:01:02,313 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 194 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:02,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 83 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:01:02,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-20 18:01:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2022-03-20 18:01:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2085106382978723) internal successors, (284), 235 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 288 transitions. [2022-03-20 18:01:02,512 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 288 transitions. Word has length 102 [2022-03-20 18:01:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:02,512 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 288 transitions. [2022-03-20 18:01:02,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 288 transitions. [2022-03-20 18:01:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:02,513 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:02,513 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 18:01:02,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-20 18:01:02,713 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,SelfDestructingSolverStorable69 [2022-03-20 18:01:02,713 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1658156932, now seen corresponding path program 43 times [2022-03-20 18:01:02,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:02,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1708357867] [2022-03-20 18:01:02,715 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:02,715 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1658156932, now seen corresponding path program 44 times [2022-03-20 18:01:02,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:02,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225675713] [2022-03-20 18:01:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:02,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:03,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-20 18:01:03,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:03,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225675713] [2022-03-20 18:01:03,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225675713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:03,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203860875] [2022-03-20 18:01:03,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:03,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:03,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:03,191 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) [2022-03-20 18:01:03,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 18:01:03,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:03,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:01:03,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:04,061 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 18:01:04,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 18:01:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:01:04,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:04,501 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 18:01:04,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 18:01:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:01:04,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203860875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:04,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:04,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 37 [2022-03-20 18:01:04,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:04,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1708357867] [2022-03-20 18:01:04,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1708357867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:04,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:04,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:01:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879352034] [2022-03-20 18:01:04,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:04,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:01:04,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:04,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:01:04,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:01:04,653 INFO L87 Difference]: Start difference. First operand 240 states and 288 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:05,569 INFO L93 Difference]: Finished difference Result 313 states and 374 transitions. [2022-03-20 18:01:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:01:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:05,570 INFO L225 Difference]: With dead ends: 313 [2022-03-20 18:01:05,570 INFO L226 Difference]: Without dead ends: 244 [2022-03-20 18:01:05,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:01:05,571 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:05,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 86 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-20 18:01:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-03-20 18:01:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-03-20 18:01:05,774 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-03-20 18:01:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:05,774 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-03-20 18:01:05,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-03-20 18:01:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:05,775 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:05,775 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 18:01:05,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:05,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:05,994 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:05,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1577087558, now seen corresponding path program 45 times [2022-03-20 18:01:05,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:05,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1657146639] [2022-03-20 18:01:05,995 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:05,995 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:05,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1577087558, now seen corresponding path program 46 times [2022-03-20 18:01:05,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:05,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556996553] [2022-03-20 18:01:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:05,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:06,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 18:01:06,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:06,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556996553] [2022-03-20 18:01:06,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556996553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:06,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208626597] [2022-03-20 18:01:06,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:06,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:06,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:06,410 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) [2022-03-20 18:01:06,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 18:01:06,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:06,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:06,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 18:01:06,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:07,162 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:01:07,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 18:01:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:01:07,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:07,560 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 18:01:07,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 18:01:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:01:07,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208626597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:07,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:07,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 12] total 37 [2022-03-20 18:01:07,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:07,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1657146639] [2022-03-20 18:01:07,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1657146639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:07,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:07,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:01:07,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527756417] [2022-03-20 18:01:07,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:07,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:01:07,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:07,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:01:07,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:01:07,692 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:08,708 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2022-03-20 18:01:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:01:08,711 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:08,712 INFO L225 Difference]: With dead ends: 319 [2022-03-20 18:01:08,712 INFO L226 Difference]: Without dead ends: 247 [2022-03-20 18:01:08,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:01:08,713 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 130 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:08,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 97 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:01:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-20 18:01:08,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-03-20 18:01:08,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:08,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-03-20 18:01:08,915 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 102 [2022-03-20 18:01:08,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:08,915 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-03-20 18:01:08,915 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:08,915 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-03-20 18:01:08,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:08,916 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:08,916 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 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, 1, 1] [2022-03-20 18:01:08,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:09,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:09,116 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1383308554, now seen corresponding path program 47 times [2022-03-20 18:01:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:09,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235189537] [2022-03-20 18:01:09,118 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:09,118 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:09,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1383308554, now seen corresponding path program 48 times [2022-03-20 18:01:09,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:09,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504036426] [2022-03-20 18:01:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:09,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:09,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 18:01:09,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:09,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504036426] [2022-03-20 18:01:09,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504036426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:09,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073462144] [2022-03-20 18:01:09,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:09,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:09,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:09,462 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) [2022-03-20 18:01:09,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 18:01:10,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 18:01:10,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 18:01:10,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-03-20 18:01:11,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:13,038 INFO L356 Elim1Store]: treesize reduction 276, result has 39.6 percent of original size [2022-03-20 18:01:13,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 204 [2022-03-20 18:01:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 109 proven. 14 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 18:01:17,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073462144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:17,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:17,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 51 [2022-03-20 18:01:17,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:17,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235189537] [2022-03-20 18:01:17,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235189537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:17,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:17,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:01:17,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715014305] [2022-03-20 18:01:17,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:17,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:01:17,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:01:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2234, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:01:17,813 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:19,160 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-03-20 18:01:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:01:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:19,161 INFO L225 Difference]: With dead ends: 325 [2022-03-20 18:01:19,161 INFO L226 Difference]: Without dead ends: 250 [2022-03-20 18:01:19,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=442, Invalid=3718, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 18:01:19,162 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 204 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:19,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 86 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:01:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-20 18:01:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2022-03-20 18:01:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-03-20 18:01:19,364 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-03-20 18:01:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:19,364 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-03-20 18:01:19,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-03-20 18:01:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:19,365 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:19,365 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 18:01:19,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-20 18:01:19,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:19,566 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:19,566 INFO L85 PathProgramCache]: Analyzing trace with hash 990281544, now seen corresponding path program 49 times [2022-03-20 18:01:19,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:19,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1332212904] [2022-03-20 18:01:19,567 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:19,567 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:19,567 INFO L85 PathProgramCache]: Analyzing trace with hash 990281544, now seen corresponding path program 50 times [2022-03-20 18:01:19,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:19,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685141546] [2022-03-20 18:01:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:19,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:20,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-03-20 18:01:20,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:20,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685141546] [2022-03-20 18:01:20,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685141546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:20,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109228259] [2022-03-20 18:01:20,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:20,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:20,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:20,028 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) [2022-03-20 18:01:20,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 18:01:20,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:20,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:01:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:20,911 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 18:01:20,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 18:01:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:01:20,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:21,368 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 18:01:21,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 18:01:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:01:21,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109228259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:21,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:21,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 38 [2022-03-20 18:01:21,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:21,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1332212904] [2022-03-20 18:01:21,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1332212904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:21,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:21,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:01:21,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469191090] [2022-03-20 18:01:21,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:21,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:01:21,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:01:21,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:01:21,545 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:22,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:22,517 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2022-03-20 18:01:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:01:22,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:22,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:22,518 INFO L225 Difference]: With dead ends: 319 [2022-03-20 18:01:22,518 INFO L226 Difference]: Without dead ends: 247 [2022-03-20 18:01:22,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:01:22,519 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:22,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 91 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-20 18:01:22,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-03-20 18:01:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-03-20 18:01:22,727 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 102 [2022-03-20 18:01:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:22,727 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-03-20 18:01:22,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-03-20 18:01:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:22,728 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:22,728 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 18:01:22,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-20 18:01:22,929 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,SelfDestructingSolverStorable73 [2022-03-20 18:01:22,929 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:22,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:22,929 INFO L85 PathProgramCache]: Analyzing trace with hash 556019204, now seen corresponding path program 51 times [2022-03-20 18:01:22,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:22,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306750691] [2022-03-20 18:01:22,930 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:22,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:22,930 INFO L85 PathProgramCache]: Analyzing trace with hash 556019204, now seen corresponding path program 52 times [2022-03-20 18:01:22,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:22,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41494793] [2022-03-20 18:01:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:22,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 18:01:23,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41494793] [2022-03-20 18:01:23,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41494793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314133704] [2022-03-20 18:01:23,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:23,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:23,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:23,385 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) [2022-03-20 18:01:23,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 18:01:23,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:23,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:23,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 18:01:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:24,235 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:01:24,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 18:01:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:01:24,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:24,649 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 18:01:24,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 18:01:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:01:24,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314133704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:24,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:24,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-03-20 18:01:24,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:24,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306750691] [2022-03-20 18:01:24,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306750691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:24,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:24,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:01:24,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575131860] [2022-03-20 18:01:24,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:24,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:01:24,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:24,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:01:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:01:24,778 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:25,815 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-03-20 18:01:25,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:01:25,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:25,817 INFO L225 Difference]: With dead ends: 325 [2022-03-20 18:01:25,817 INFO L226 Difference]: Without dead ends: 250 [2022-03-20 18:01:25,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=246, Invalid=2304, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:01:25,817 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 102 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:25,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 88 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:01:25,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-20 18:01:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-03-20 18:01:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2008196721311475) internal successors, (293), 244 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2022-03-20 18:01:26,027 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 102 [2022-03-20 18:01:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:26,028 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2022-03-20 18:01:26,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:26,028 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2022-03-20 18:01:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:26,028 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:26,028 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 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, 1, 1] [2022-03-20 18:01:26,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:26,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:26,239 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash 362240200, now seen corresponding path program 53 times [2022-03-20 18:01:26,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1439160976] [2022-03-20 18:01:26,241 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:26,241 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash 362240200, now seen corresponding path program 54 times [2022-03-20 18:01:26,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:26,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514047490] [2022-03-20 18:01:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:26,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:26,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 18:01:26,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:26,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514047490] [2022-03-20 18:01:26,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514047490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:26,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311774246] [2022-03-20 18:01:26,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:26,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:26,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:26,767 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) [2022-03-20 18:01:26,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 18:01:27,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 18:01:27,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:27,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 18:01:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:28,414 INFO L356 Elim1Store]: treesize reduction 46, result has 33.3 percent of original size [2022-03-20 18:01:28,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 39 [2022-03-20 18:01:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 38 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:01:28,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:29,223 INFO L356 Elim1Store]: treesize reduction 114, result has 53.5 percent of original size [2022-03-20 18:01:29,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 146 [2022-03-20 18:01:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 73 proven. 10 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:01:30,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311774246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:30,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:30,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 13] total 41 [2022-03-20 18:01:30,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:30,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1439160976] [2022-03-20 18:01:30,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1439160976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:30,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:30,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:01:30,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569975863] [2022-03-20 18:01:30,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:30,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:01:30,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:30,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:01:30,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 18:01:30,641 INFO L87 Difference]: Start difference. First operand 249 states and 297 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:31,965 INFO L93 Difference]: Finished difference Result 385 states and 452 transitions. [2022-03-20 18:01:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:01:31,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:31,967 INFO L225 Difference]: With dead ends: 385 [2022-03-20 18:01:31,967 INFO L226 Difference]: Without dead ends: 307 [2022-03-20 18:01:31,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 18:01:31,967 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 125 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:31,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 101 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:01:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-20 18:01:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 270. [2022-03-20 18:01:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.2075471698113207) internal successors, (320), 265 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:32,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 324 transitions. [2022-03-20 18:01:32,205 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 324 transitions. Word has length 102 [2022-03-20 18:01:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:32,205 INFO L478 AbstractCegarLoop]: Abstraction has 270 states and 324 transitions. [2022-03-20 18:01:32,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 324 transitions. [2022-03-20 18:01:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:32,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:32,205 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:01:32,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:32,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:32,406 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:32,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:32,406 INFO L85 PathProgramCache]: Analyzing trace with hash -30786810, now seen corresponding path program 55 times [2022-03-20 18:01:32,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:32,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629339582] [2022-03-20 18:01:32,407 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:32,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:32,407 INFO L85 PathProgramCache]: Analyzing trace with hash -30786810, now seen corresponding path program 56 times [2022-03-20 18:01:32,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:32,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43805304] [2022-03-20 18:01:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:32,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:32,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-03-20 18:01:32,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:32,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43805304] [2022-03-20 18:01:32,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43805304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:32,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775820763] [2022-03-20 18:01:32,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:32,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:32,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:32,976 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) [2022-03-20 18:01:32,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 18:01:33,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:33,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:33,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:01:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:33,798 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 18:01:33,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 18:01:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 18:01:33,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:34,205 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 18:01:34,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 18:01:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-20 18:01:34,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775820763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:34,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:34,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 35 [2022-03-20 18:01:34,346 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:34,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [629339582] [2022-03-20 18:01:34,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [629339582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:34,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:34,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:01:34,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863814901] [2022-03-20 18:01:34,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:34,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:01:34,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:34,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:01:34,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 18:01:34,348 INFO L87 Difference]: Start difference. First operand 270 states and 324 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:35,480 INFO L93 Difference]: Finished difference Result 846 states and 1013 transitions. [2022-03-20 18:01:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 18:01:35,480 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:35,482 INFO L225 Difference]: With dead ends: 846 [2022-03-20 18:01:35,482 INFO L226 Difference]: Without dead ends: 747 [2022-03-20 18:01:35,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=1498, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:01:35,483 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 215 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:35,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 52 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-20 18:01:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 352. [2022-03-20 18:01:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.2046109510086456) internal successors, (418), 347 states have internal predecessors, (418), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 422 transitions. [2022-03-20 18:01:35,819 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 422 transitions. Word has length 102 [2022-03-20 18:01:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:35,819 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 422 transitions. [2022-03-20 18:01:35,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 422 transitions. [2022-03-20 18:01:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:35,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:35,820 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:01:35,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-20 18:01:36,020 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,SelfDestructingSolverStorable76 [2022-03-20 18:01:36,021 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1765297018, now seen corresponding path program 57 times [2022-03-20 18:01:36,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:36,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [412010732] [2022-03-20 18:01:36,022 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:36,022 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1765297018, now seen corresponding path program 58 times [2022-03-20 18:01:36,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:36,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452512355] [2022-03-20 18:01:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:36,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:36,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 76 proven. 85 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-20 18:01:36,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:36,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452512355] [2022-03-20 18:01:36,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452512355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:36,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268119895] [2022-03-20 18:01:36,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:36,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:36,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:36,624 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) [2022-03-20 18:01:36,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 18:01:37,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:37,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:37,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 18:01:37,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:37,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 18:01:37,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:37,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:37,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:37,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:37,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:37,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:37,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:37,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:37,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:37,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:37,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:38,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 18:01:38,502 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-03-20 18:01:38,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 27 [2022-03-20 18:01:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 91 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 18:01:38,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:39,402 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3848 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3848) |c_main_~#vetor_vogais~0.base|)) (.cse1 (select v_ArrVal_3848 |c_main_~#string_entrada~0.offset|))) (or (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (not (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)) .cse1))))) is different from false [2022-03-20 18:01:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 18:01:39,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268119895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:39,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:39,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 56 [2022-03-20 18:01:39,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:39,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [412010732] [2022-03-20 18:01:39,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [412010732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:39,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:39,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:01:39,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537425187] [2022-03-20 18:01:39,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:39,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:01:39,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:39,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:01:39,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2679, Unknown=1, NotChecked=106, Total=3080 [2022-03-20 18:01:39,592 INFO L87 Difference]: Start difference. First operand 352 states and 422 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:41,546 INFO L93 Difference]: Finished difference Result 692 states and 822 transitions. [2022-03-20 18:01:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:01:41,546 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:41,548 INFO L225 Difference]: With dead ends: 692 [2022-03-20 18:01:41,548 INFO L226 Difference]: Without dead ends: 593 [2022-03-20 18:01:41,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=514, Invalid=5341, Unknown=1, NotChecked=150, Total=6006 [2022-03-20 18:01:41,549 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 123 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:41,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 63 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:01:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-03-20 18:01:42,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 533. [2022-03-20 18:01:42,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 528 states have (on average 1.2007575757575757) internal successors, (634), 528 states have internal predecessors, (634), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 638 transitions. [2022-03-20 18:01:42,100 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 638 transitions. Word has length 102 [2022-03-20 18:01:42,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:42,100 INFO L478 AbstractCegarLoop]: Abstraction has 533 states and 638 transitions. [2022-03-20 18:01:42,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:42,100 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 638 transitions. [2022-03-20 18:01:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:42,101 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:42,101 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:01:42,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-20 18:01:42,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-20 18:01:42,302 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1879648578, now seen corresponding path program 59 times [2022-03-20 18:01:42,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:42,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [749961688] [2022-03-20 18:01:42,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:42,303 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:42,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1879648578, now seen corresponding path program 60 times [2022-03-20 18:01:42,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:42,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288557429] [2022-03-20 18:01:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:42,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:42,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 49 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-03-20 18:01:42,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288557429] [2022-03-20 18:01:42,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288557429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958953641] [2022-03-20 18:01:42,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:42,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:42,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:42,997 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) [2022-03-20 18:01:42,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 18:01:43,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 18:01:43,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:43,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 18:01:43,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:44,567 INFO L356 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2022-03-20 18:01:44,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 43 [2022-03-20 18:01:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 103 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 18:01:44,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:45,506 INFO L356 Elim1Store]: treesize reduction 122, result has 52.2 percent of original size [2022-03-20 18:01:45,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 148 [2022-03-20 18:01:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 108 proven. 77 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 18:01:48,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958953641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:48,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:48,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 51 [2022-03-20 18:01:48,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:48,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [749961688] [2022-03-20 18:01:48,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [749961688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:48,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:48,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:01:48,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795249954] [2022-03-20 18:01:48,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:48,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:01:48,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:48,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:01:48,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:01:48,043 INFO L87 Difference]: Start difference. First operand 533 states and 638 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:49,999 INFO L93 Difference]: Finished difference Result 1164 states and 1390 transitions. [2022-03-20 18:01:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:01:50,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:50,002 INFO L225 Difference]: With dead ends: 1164 [2022-03-20 18:01:50,002 INFO L226 Difference]: Without dead ends: 1053 [2022-03-20 18:01:50,003 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=467, Invalid=3439, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 18:01:50,003 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 231 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:50,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 76 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-03-20 18:01:50,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 557. [2022-03-20 18:01:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 552 states have (on average 1.1992753623188406) internal successors, (662), 552 states have internal predecessors, (662), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 666 transitions. [2022-03-20 18:01:50,592 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 666 transitions. Word has length 102 [2022-03-20 18:01:50,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:50,592 INFO L478 AbstractCegarLoop]: Abstraction has 557 states and 666 transitions. [2022-03-20 18:01:50,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:50,592 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 666 transitions. [2022-03-20 18:01:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:50,593 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:50,593 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:01:50,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:50,802 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:50,802 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:50,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1801342470, now seen corresponding path program 61 times [2022-03-20 18:01:50,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:50,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [961606459] [2022-03-20 18:01:50,803 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:50,803 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1801342470, now seen corresponding path program 62 times [2022-03-20 18:01:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:50,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415839992] [2022-03-20 18:01:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:51,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 127 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-03-20 18:01:51,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:51,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415839992] [2022-03-20 18:01:51,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415839992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:51,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734284781] [2022-03-20 18:01:51,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:51,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:51,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:51,510 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) [2022-03-20 18:01:51,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 18:01:51,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:51,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:51,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 18:01:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:51,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 18:01:51,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:51,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:52,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:52,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:52,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:52,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:52,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:52,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:52,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:52,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:52,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:52,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-03-20 18:01:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 18:01:52,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:53,247 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_3968 (Array Int Int))) (let ((.cse1 (select v_ArrVal_3968 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3968) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-03-20 18:01:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 9 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-03-20 18:01:53,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734284781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:53,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:53,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 12] total 46 [2022-03-20 18:01:53,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:53,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [961606459] [2022-03-20 18:01:53,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [961606459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:53,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:53,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:01:53,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794960358] [2022-03-20 18:01:53,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:53,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:01:53,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:01:53,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1797, Unknown=1, NotChecked=86, Total=2070 [2022-03-20 18:01:53,372 INFO L87 Difference]: Start difference. First operand 557 states and 666 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:55,793 INFO L93 Difference]: Finished difference Result 806 states and 944 transitions. [2022-03-20 18:01:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:01:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:01:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:55,796 INFO L225 Difference]: With dead ends: 806 [2022-03-20 18:01:55,796 INFO L226 Difference]: Without dead ends: 695 [2022-03-20 18:01:55,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=441, Invalid=4818, Unknown=1, NotChecked=142, Total=5402 [2022-03-20 18:01:55,797 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 129 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:55,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 90 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:01:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-03-20 18:01:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 575. [2022-03-20 18:01:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 570 states have (on average 1.1964912280701754) internal successors, (682), 570 states have internal predecessors, (682), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 686 transitions. [2022-03-20 18:01:56,379 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 686 transitions. Word has length 102 [2022-03-20 18:01:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:56,380 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 686 transitions. [2022-03-20 18:01:56,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 686 transitions. [2022-03-20 18:01:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:01:56,381 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:56,381 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:01:56,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:56,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:56,594 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:56,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:56,594 INFO L85 PathProgramCache]: Analyzing trace with hash -585826366, now seen corresponding path program 63 times [2022-03-20 18:01:56,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:56,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [661798407] [2022-03-20 18:01:56,595 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:56,595 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash -585826366, now seen corresponding path program 64 times [2022-03-20 18:01:56,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:56,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977957843] [2022-03-20 18:01:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:56,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:57,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 76 proven. 148 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 18:01:57,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:57,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977957843] [2022-03-20 18:01:57,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977957843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:57,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313309546] [2022-03-20 18:01:57,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:57,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:57,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:57,288 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:57,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 18:01:57,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:57,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:57,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 18:01:57,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:57,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 18:01:57,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:57,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:57,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:57,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:57,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:57,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:57,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:57,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:57,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:57,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:58,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:01:59,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 18:01:59,067 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-03-20 18:01:59,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 27 [2022-03-20 18:01:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 91 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 18:01:59,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:00,095 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4037 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4037) |c_main_~#vetor_vogais~0.base|)) (.cse1 (select v_ArrVal_4037 |c_main_~#string_entrada~0.offset|))) (or (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (not (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)) .cse1))))) is different from false [2022-03-20 18:02:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 18:02:00,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313309546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:00,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:00,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 20] total 61 [2022-03-20 18:02:00,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:00,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [661798407] [2022-03-20 18:02:00,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [661798407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:00,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:00,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:02:00,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876733402] [2022-03-20 18:02:00,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:00,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:02:00,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:00,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:02:00,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3243, Unknown=1, NotChecked=116, Total=3660 [2022-03-20 18:02:00,296 INFO L87 Difference]: Start difference. First operand 575 states and 686 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:03,209 INFO L93 Difference]: Finished difference Result 854 states and 994 transitions. [2022-03-20 18:02:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:02:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:02:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:03,212 INFO L225 Difference]: With dead ends: 854 [2022-03-20 18:02:03,212 INFO L226 Difference]: Without dead ends: 731 [2022-03-20 18:02:03,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=595, Invalid=7598, Unknown=1, NotChecked=178, Total=8372 [2022-03-20 18:02:03,213 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 131 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:03,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 89 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:02:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-20 18:02:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 581. [2022-03-20 18:02:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 576 states have (on average 1.1944444444444444) internal successors, (688), 576 states have internal predecessors, (688), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 692 transitions. [2022-03-20 18:02:03,819 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 692 transitions. Word has length 102 [2022-03-20 18:02:03,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:03,820 INFO L478 AbstractCegarLoop]: Abstraction has 581 states and 692 transitions. [2022-03-20 18:02:03,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 692 transitions. [2022-03-20 18:02:03,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:02:03,821 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:03,821 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:02:03,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:04,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:04,035 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:04,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1253701754, now seen corresponding path program 65 times [2022-03-20 18:02:04,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:04,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [99440066] [2022-03-20 18:02:04,037 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:04,037 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1253701754, now seen corresponding path program 66 times [2022-03-20 18:02:04,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:04,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265397542] [2022-03-20 18:02:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:04,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 170 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 18:02:04,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:04,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265397542] [2022-03-20 18:02:04,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265397542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:04,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181641118] [2022-03-20 18:02:04,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:02:04,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:04,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:04,988 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:04,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 18:02:06,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 18:02:06,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:06,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 18:02:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:06,092 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 18:02:06,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:02:06,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:06,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:06,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:06,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:06,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:06,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:06,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:06,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:06,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:06,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:06,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:07,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 16 [2022-03-20 18:02:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 95 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 18:02:07,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:20,297 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_4103 (Array Int Int))) (let ((.cse1 (select v_ArrVal_4103 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4103) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-03-20 18:02:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-20 18:02:20,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181641118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:20,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:20,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 16] total 54 [2022-03-20 18:02:20,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:20,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [99440066] [2022-03-20 18:02:20,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [99440066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:20,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:20,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 18:02:20,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360868908] [2022-03-20 18:02:20,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:20,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 18:02:20,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 18:02:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2434, Unknown=7, NotChecked=102, Total=2862 [2022-03-20 18:02:20,441 INFO L87 Difference]: Start difference. First operand 581 states and 692 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:23,512 INFO L93 Difference]: Finished difference Result 1862 states and 2209 transitions. [2022-03-20 18:02:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:02:23,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:02:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:23,517 INFO L225 Difference]: With dead ends: 1862 [2022-03-20 18:02:23,517 INFO L226 Difference]: Without dead ends: 1639 [2022-03-20 18:02:23,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=547, Invalid=5000, Unknown=7, NotChecked=146, Total=5700 [2022-03-20 18:02:23,518 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 309 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:23,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 114 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:02:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-03-20 18:02:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1032. [2022-03-20 18:02:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1027 states have (on average 1.1976630963972736) internal successors, (1230), 1027 states have internal predecessors, (1230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1234 transitions. [2022-03-20 18:02:24,638 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1234 transitions. Word has length 102 [2022-03-20 18:02:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:24,639 INFO L478 AbstractCegarLoop]: Abstraction has 1032 states and 1234 transitions. [2022-03-20 18:02:24,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1234 transitions. [2022-03-20 18:02:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:02:24,641 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:24,641 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:02:24,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:24,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:24,850 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:24,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:24,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1687964094, now seen corresponding path program 67 times [2022-03-20 18:02:24,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:24,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [936552414] [2022-03-20 18:02:24,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:24,851 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1687964094, now seen corresponding path program 68 times [2022-03-20 18:02:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:24,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322070567] [2022-03-20 18:02:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:25,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 125 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 18:02:25,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:25,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322070567] [2022-03-20 18:02:25,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322070567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:25,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490220773] [2022-03-20 18:02:25,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:02:25,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:25,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:25,947 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:25,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 18:02:26,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:02:26,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:26,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 18:02:26,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:26,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 18:02:26,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:26,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:26,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:26,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:26,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:26,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:26,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:26,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:26,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:26,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:26,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:02:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 43 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-20 18:02:27,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:27,969 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_4169 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4169) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_4169 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) is different from false [2022-03-20 18:02:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 8 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 18:02:28,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490220773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:28,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:28,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 14] total 45 [2022-03-20 18:02:28,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:28,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [936552414] [2022-03-20 18:02:28,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [936552414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:28,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:28,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:02:28,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568149622] [2022-03-20 18:02:28,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:28,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 18:02:28,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 18:02:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1696, Unknown=1, NotChecked=84, Total=1980 [2022-03-20 18:02:28,118 INFO L87 Difference]: Start difference. First operand 1032 states and 1234 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:33,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:33,376 INFO L93 Difference]: Finished difference Result 2777 states and 3309 transitions. [2022-03-20 18:02:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:02:33,376 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:02:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:33,382 INFO L225 Difference]: With dead ends: 2777 [2022-03-20 18:02:33,382 INFO L226 Difference]: Without dead ends: 2648 [2022-03-20 18:02:33,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=775, Invalid=5708, Unknown=1, NotChecked=158, Total=6642 [2022-03-20 18:02:33,384 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 467 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:33,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 67 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:02:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2022-03-20 18:02:35,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1495. [2022-03-20 18:02:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1490 states have (on average 1.2080536912751678) internal successors, (1800), 1490 states have internal predecessors, (1800), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 1804 transitions. [2022-03-20 18:02:35,103 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 1804 transitions. Word has length 102 [2022-03-20 18:02:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:35,103 INFO L478 AbstractCegarLoop]: Abstraction has 1495 states and 1804 transitions. [2022-03-20 18:02:35,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 1804 transitions. [2022-03-20 18:02:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:02:35,105 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:35,105 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 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, 1, 1] [2022-03-20 18:02:35,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:35,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:35,305 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:35,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:35,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2020197188, now seen corresponding path program 69 times [2022-03-20 18:02:35,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:35,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1122460224] [2022-03-20 18:02:35,307 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:35,307 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:35,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2020197188, now seen corresponding path program 70 times [2022-03-20 18:02:35,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:35,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360196400] [2022-03-20 18:02:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:35,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:35,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-03-20 18:02:35,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:35,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360196400] [2022-03-20 18:02:35,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360196400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:35,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729097992] [2022-03-20 18:02:35,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:02:35,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:35,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:35,449 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:35,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 18:02:35,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:02:35,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:35,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 18:02:35,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-03-20 18:02:36,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-03-20 18:02:36,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729097992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:36,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:36,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2022-03-20 18:02:36,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1122460224] [2022-03-20 18:02:36,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1122460224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:36,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:36,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:02:36,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140134430] [2022-03-20 18:02:36,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:36,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:02:36,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:36,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:02:36,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-20 18:02:36,352 INFO L87 Difference]: Start difference. First operand 1495 states and 1804 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:42,122 INFO L93 Difference]: Finished difference Result 4338 states and 5267 transitions. [2022-03-20 18:02:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:02:42,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:02:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:42,136 INFO L225 Difference]: With dead ends: 4338 [2022-03-20 18:02:42,137 INFO L226 Difference]: Without dead ends: 4332 [2022-03-20 18:02:42,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:02:42,138 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:42,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 143 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:02:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2022-03-20 18:02:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3353. [2022-03-20 18:02:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3348 states have (on average 1.2144563918757467) internal successors, (4066), 3348 states have internal predecessors, (4066), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 4070 transitions. [2022-03-20 18:02:46,236 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 4070 transitions. Word has length 102 [2022-03-20 18:02:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:46,237 INFO L478 AbstractCegarLoop]: Abstraction has 3353 states and 4070 transitions. [2022-03-20 18:02:46,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 4070 transitions. [2022-03-20 18:02:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:02:46,242 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:46,242 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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, 1, 1, 1] [2022-03-20 18:02:46,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:46,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-20 18:02:46,455 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1573170234, now seen corresponding path program 71 times [2022-03-20 18:02:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:46,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [388005368] [2022-03-20 18:02:46,457 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:46,457 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:46,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1573170234, now seen corresponding path program 72 times [2022-03-20 18:02:46,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:46,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913788012] [2022-03-20 18:02:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:46,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 18:02:46,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:46,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913788012] [2022-03-20 18:02:46,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913788012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:46,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627079514] [2022-03-20 18:02:46,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:02:46,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:46,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:46,935 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:46,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 18:02:48,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 18:02:48,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:48,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 18:02:48,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 61 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-03-20 18:02:49,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 18:02:51,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627079514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:51,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:51,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 16] total 40 [2022-03-20 18:02:51,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [388005368] [2022-03-20 18:02:51,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [388005368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:51,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:51,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:02:51,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373818623] [2022-03-20 18:02:51,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:51,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:02:51,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:02:51,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1345, Unknown=2, NotChecked=0, Total=1560 [2022-03-20 18:02:51,843 INFO L87 Difference]: Start difference. First operand 3353 states and 4070 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:56,323 INFO L93 Difference]: Finished difference Result 4761 states and 5766 transitions. [2022-03-20 18:02:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:02:56,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:02:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:56,330 INFO L225 Difference]: With dead ends: 4761 [2022-03-20 18:02:56,330 INFO L226 Difference]: Without dead ends: 3380 [2022-03-20 18:02:56,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=272, Invalid=1888, Unknown=2, NotChecked=0, Total=2162 [2022-03-20 18:02:56,333 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:56,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 58 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:02:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3380 states. [2022-03-20 18:03:00,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3380 to 3371. [2022-03-20 18:03:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3371 states, 3366 states have (on average 1.2118241235888294) internal successors, (4079), 3366 states have internal predecessors, (4079), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:00,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3371 states to 3371 states and 4083 transitions. [2022-03-20 18:03:00,327 INFO L78 Accepts]: Start accepts. Automaton has 3371 states and 4083 transitions. Word has length 102 [2022-03-20 18:03:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:00,328 INFO L478 AbstractCegarLoop]: Abstraction has 3371 states and 4083 transitions. [2022-03-20 18:03:00,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3371 states and 4083 transitions. [2022-03-20 18:03:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:03:00,333 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:00,333 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:03:00,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-20 18:03:00,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:00,541 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:00,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:00,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1220399798, now seen corresponding path program 73 times [2022-03-20 18:03:00,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:00,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499718009] [2022-03-20 18:03:00,543 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:00,543 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:00,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1220399798, now seen corresponding path program 74 times [2022-03-20 18:03:00,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:00,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105721408] [2022-03-20 18:03:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:00,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:01,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 113 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-03-20 18:03:01,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105721408] [2022-03-20 18:03:01,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105721408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333494840] [2022-03-20 18:03:01,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:03:01,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:01,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:01,240 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:01,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 18:03:01,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:03:01,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 18:03:01,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:02,340 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 18:03:02,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 18:03:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 18:03:02,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:02,946 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-20 18:03:02,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-20 18:03:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 18:03:03,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333494840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:03,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:03,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 15] total 44 [2022-03-20 18:03:03,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:03,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499718009] [2022-03-20 18:03:03,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499718009] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:03,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:03,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:03:03,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485095947] [2022-03-20 18:03:03,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:03,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:03:03,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:03,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:03:03,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:03:03,116 INFO L87 Difference]: Start difference. First operand 3371 states and 4083 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:12,277 INFO L93 Difference]: Finished difference Result 7225 states and 8647 transitions. [2022-03-20 18:03:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 18:03:12,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:03:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:12,288 INFO L225 Difference]: With dead ends: 7225 [2022-03-20 18:03:12,288 INFO L226 Difference]: Without dead ends: 5820 [2022-03-20 18:03:12,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=641, Invalid=5679, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:03:12,293 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 167 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:12,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 82 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:03:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2022-03-20 18:03:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 3208. [2022-03-20 18:03:16,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3203 states have (on average 1.2119887605369966) internal successors, (3882), 3203 states have internal predecessors, (3882), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3886 transitions. [2022-03-20 18:03:16,355 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3886 transitions. Word has length 102 [2022-03-20 18:03:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:16,355 INFO L478 AbstractCegarLoop]: Abstraction has 3208 states and 3886 transitions. [2022-03-20 18:03:16,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3886 transitions. [2022-03-20 18:03:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:03:16,359 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:16,359 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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, 1, 1, 1] [2022-03-20 18:03:16,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-20 18:03:16,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:16,559 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash -313195450, now seen corresponding path program 75 times [2022-03-20 18:03:16,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:16,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1024550650] [2022-03-20 18:03:16,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:16,561 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash -313195450, now seen corresponding path program 76 times [2022-03-20 18:03:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:16,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731994631] [2022-03-20 18:03:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:16,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:17,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 67 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-03-20 18:03:17,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:17,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731994631] [2022-03-20 18:03:17,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731994631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:17,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710344255] [2022-03-20 18:03:17,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:03:17,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:17,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:17,499 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:17,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 18:03:17,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:03:17,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:17,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 18:03:17,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:18,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 18:03:18,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 18:03:18,503 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:03:18,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 14 [2022-03-20 18:03:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 18:03:18,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:28,346 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 18:03:28,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 18:03:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 68 proven. 55 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 18:03:28,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710344255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:28,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:28,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 14] total 40 [2022-03-20 18:03:28,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:28,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1024550650] [2022-03-20 18:03:28,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1024550650] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:28,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:28,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:03:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184359598] [2022-03-20 18:03:28,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:28,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 18:03:28,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 18:03:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1310, Unknown=16, NotChecked=0, Total=1560 [2022-03-20 18:03:28,484 INFO L87 Difference]: Start difference. First operand 3208 states and 3886 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:39,432 INFO L93 Difference]: Finished difference Result 8895 states and 10695 transitions. [2022-03-20 18:03:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:03:39,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:03:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:39,443 INFO L225 Difference]: With dead ends: 8895 [2022-03-20 18:03:39,444 INFO L226 Difference]: Without dead ends: 7066 [2022-03-20 18:03:39,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=820, Invalid=4134, Unknown=16, NotChecked=0, Total=4970 [2022-03-20 18:03:39,449 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 449 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:39,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 48 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:03:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7066 states. [2022-03-20 18:03:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7066 to 3705. [2022-03-20 18:03:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3700 states have (on average 1.194054054054054) internal successors, (4418), 3700 states have internal predecessors, (4418), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 4422 transitions. [2022-03-20 18:03:44,310 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 4422 transitions. Word has length 102 [2022-03-20 18:03:44,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:44,310 INFO L478 AbstractCegarLoop]: Abstraction has 3705 states and 4422 transitions. [2022-03-20 18:03:44,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 4422 transitions. [2022-03-20 18:03:44,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:03:44,313 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:44,313 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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, 1, 1, 1] [2022-03-20 18:03:44,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-20 18:03:44,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:44,514 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:44,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:44,514 INFO L85 PathProgramCache]: Analyzing trace with hash 781431434, now seen corresponding path program 77 times [2022-03-20 18:03:44,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:44,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368729711] [2022-03-20 18:03:44,515 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:44,515 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:44,515 INFO L85 PathProgramCache]: Analyzing trace with hash 781431434, now seen corresponding path program 78 times [2022-03-20 18:03:44,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:44,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320776371] [2022-03-20 18:03:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:44,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:45,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 18:03:45,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:45,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320776371] [2022-03-20 18:03:45,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320776371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:45,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963775804] [2022-03-20 18:03:45,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:03:45,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:45,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:45,020 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:45,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 18:03:46,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 18:03:46,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:46,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 18:03:46,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:46,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 18:03:46,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:46,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:46,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:46,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:46,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:46,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:46,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:46,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:46,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:46,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:46,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-20 18:03:48,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-03-20 18:03:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 40 proven. 129 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-03-20 18:03:48,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:50,009 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4452 (Array Int Int))) (let ((.cse1 (select v_ArrVal_4452 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4452) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 9)) .cse1) (< .cse1 (select .cse0 |c_main_~#vetor_vogais~0.offset|))))) is different from false [2022-03-20 18:03:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 129 refuted. 0 times theorem prover too weak. 173 trivial. 19 not checked. [2022-03-20 18:03:50,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963775804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:50,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:50,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 25] total 62 [2022-03-20 18:03:50,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:50,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368729711] [2022-03-20 18:03:50,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368729711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:50,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:50,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:03:50,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173409938] [2022-03-20 18:03:50,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:50,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:03:50,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:03:50,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=3110, Unknown=1, NotChecked=118, Total=3782 [2022-03-20 18:03:50,299 INFO L87 Difference]: Start difference. First operand 3705 states and 4422 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:56,726 INFO L93 Difference]: Finished difference Result 4479 states and 5345 transitions. [2022-03-20 18:03:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:03:56,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:03:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:56,734 INFO L225 Difference]: With dead ends: 4479 [2022-03-20 18:03:56,734 INFO L226 Difference]: Without dead ends: 4188 [2022-03-20 18:03:56,736 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=707, Invalid=4846, Unknown=1, NotChecked=146, Total=5700 [2022-03-20 18:03:56,736 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 79 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:56,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 105 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:03:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2022-03-20 18:04:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3747. [2022-03-20 18:04:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3742 states have (on average 1.196151790486371) internal successors, (4476), 3742 states have internal predecessors, (4476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 4480 transitions. [2022-03-20 18:04:01,675 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 4480 transitions. Word has length 102 [2022-03-20 18:04:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:01,675 INFO L478 AbstractCegarLoop]: Abstraction has 3747 states and 4480 transitions. [2022-03-20 18:04:01,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 4480 transitions. [2022-03-20 18:04:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:04:01,678 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:01,678 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:01,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-20 18:04:01,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:01,879 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1047935946, now seen corresponding path program 1 times [2022-03-20 18:04:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:01,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2007726754] [2022-03-20 18:04:01,880 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:01,880 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:01,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1047935946, now seen corresponding path program 2 times [2022-03-20 18:04:01,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:01,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399508797] [2022-03-20 18:04:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:01,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-03-20 18:04:02,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:02,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399508797] [2022-03-20 18:04:02,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399508797] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:02,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812648203] [2022-03-20 18:04:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:04:02,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:02,587 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:02,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 18:04:02,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:04:02,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:02,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 18:04:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:03,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 18:04:03,361 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 18:04:03,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 18:04:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:04:03,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:03,607 INFO L356 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2022-03-20 18:04:03,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 65 [2022-03-20 18:04:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:04:03,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812648203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:03,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:03,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 25 [2022-03-20 18:04:03,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:03,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2007726754] [2022-03-20 18:04:03,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2007726754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:03,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:03,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:04:03,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235501874] [2022-03-20 18:04:03,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:03,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:04:03,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:03,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:04:03,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:04:03,708 INFO L87 Difference]: Start difference. First operand 3747 states and 4480 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:11,984 INFO L93 Difference]: Finished difference Result 6289 states and 7484 transitions. [2022-03-20 18:04:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:04:11,984 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:04:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:11,996 INFO L225 Difference]: With dead ends: 6289 [2022-03-20 18:04:11,996 INFO L226 Difference]: Without dead ends: 5229 [2022-03-20 18:04:11,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=509, Invalid=1561, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:04:12,000 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 260 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:12,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 52 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:04:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2022-03-20 18:04:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 3360. [2022-03-20 18:04:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3355 states have (on average 1.1907600596125187) internal successors, (3995), 3355 states have internal predecessors, (3995), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 3999 transitions. [2022-03-20 18:04:16,571 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 3999 transitions. Word has length 102 [2022-03-20 18:04:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:16,571 INFO L478 AbstractCegarLoop]: Abstraction has 3360 states and 3999 transitions. [2022-03-20 18:04:16,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 3999 transitions. [2022-03-20 18:04:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:04:16,574 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:16,574 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:04:16,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-20 18:04:16,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:16,775 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:16,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:16,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1192547638, now seen corresponding path program 79 times [2022-03-20 18:04:16,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:16,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926891941] [2022-03-20 18:04:16,776 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:16,776 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:16,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1192547638, now seen corresponding path program 80 times [2022-03-20 18:04:16,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:16,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080921871] [2022-03-20 18:04:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:16,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:17,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 43 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-20 18:04:17,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080921871] [2022-03-20 18:04:17,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080921871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924721044] [2022-03-20 18:04:17,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:04:17,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:17,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:17,279 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:17,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 18:04:17,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:04:17,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:17,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 18:04:17,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:17,962 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 18:04:17,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-20 18:04:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:04:18,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:18,230 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-20 18:04:18,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-20 18:04:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:04:18,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924721044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:18,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:18,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 30 [2022-03-20 18:04:18,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926891941] [2022-03-20 18:04:18,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926891941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:18,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:18,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:04:18,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866025121] [2022-03-20 18:04:18,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:18,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:04:18,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:04:18,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:04:18,352 INFO L87 Difference]: Start difference. First operand 3360 states and 3999 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:26,180 INFO L93 Difference]: Finished difference Result 5781 states and 6927 transitions. [2022-03-20 18:04:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:04:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:04:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:26,188 INFO L225 Difference]: With dead ends: 5781 [2022-03-20 18:04:26,188 INFO L226 Difference]: Without dead ends: 5430 [2022-03-20 18:04:26,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 18:04:26,191 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 84 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:26,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 73 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:04:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2022-03-20 18:04:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 5429. [2022-03-20 18:04:33,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5429 states, 5424 states have (on average 1.1952433628318584) internal successors, (6483), 5424 states have internal predecessors, (6483), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5429 states to 5429 states and 6487 transitions. [2022-03-20 18:04:33,560 INFO L78 Accepts]: Start accepts. Automaton has 5429 states and 6487 transitions. Word has length 102 [2022-03-20 18:04:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:33,560 INFO L478 AbstractCegarLoop]: Abstraction has 5429 states and 6487 transitions. [2022-03-20 18:04:33,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5429 states and 6487 transitions. [2022-03-20 18:04:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:04:33,565 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:33,565 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:04:33,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-20 18:04:33,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-20 18:04:33,767 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:33,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1367909450, now seen corresponding path program 81 times [2022-03-20 18:04:33,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:33,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [295755340] [2022-03-20 18:04:33,768 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:33,768 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:33,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1367909450, now seen corresponding path program 82 times [2022-03-20 18:04:33,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:33,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273103879] [2022-03-20 18:04:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:33,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:34,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 86 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-20 18:04:34,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:34,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273103879] [2022-03-20 18:04:34,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273103879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:34,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787519063] [2022-03-20 18:04:34,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:04:34,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:34,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:34,303 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:34,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 18:04:34,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:04:34,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:34,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 18:04:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:34,994 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 18:04:34,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-20 18:04:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-03-20 18:04:35,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:35,248 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-20 18:04:35,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-20 18:04:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:04:35,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787519063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:35,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:35,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 31 [2022-03-20 18:04:35,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:35,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [295755340] [2022-03-20 18:04:35,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [295755340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:35,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:35,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:04:35,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467152344] [2022-03-20 18:04:35,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:35,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:04:35,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:35,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:04:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:04:35,331 INFO L87 Difference]: Start difference. First operand 5429 states and 6487 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:49,504 INFO L93 Difference]: Finished difference Result 10767 states and 12807 transitions. [2022-03-20 18:04:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:04:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:04:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:49,520 INFO L225 Difference]: With dead ends: 10767 [2022-03-20 18:04:49,520 INFO L226 Difference]: Without dead ends: 9712 [2022-03-20 18:04:49,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:04:49,526 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 247 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:49,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 56 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:04:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9712 states. [2022-03-20 18:04:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9712 to 6745. [2022-03-20 18:04:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6740 states have (on average 1.1945103857566766) internal successors, (8051), 6740 states have internal predecessors, (8051), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 8055 transitions. [2022-03-20 18:04:58,641 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 8055 transitions. Word has length 102 [2022-03-20 18:04:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:58,641 INFO L478 AbstractCegarLoop]: Abstraction has 6745 states and 8055 transitions. [2022-03-20 18:04:58,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 8055 transitions. [2022-03-20 18:04:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:04:58,647 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:58,647 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:04:58,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-20 18:04:58,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:58,848 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:58,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:58,848 INFO L85 PathProgramCache]: Analyzing trace with hash 717887750, now seen corresponding path program 83 times [2022-03-20 18:04:58,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:58,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [558556362] [2022-03-20 18:04:58,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:58,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:58,849 INFO L85 PathProgramCache]: Analyzing trace with hash 717887750, now seen corresponding path program 84 times [2022-03-20 18:04:58,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:58,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087170806] [2022-03-20 18:04:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:58,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:59,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-20 18:04:59,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:59,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087170806] [2022-03-20 18:04:59,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087170806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:59,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136610904] [2022-03-20 18:04:59,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:04:59,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:59,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:59,473 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:59,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 18:04:59,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 18:04:59,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 18:04:59,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:05:00,220 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 18:05:00,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-20 18:05:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:05:00,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:05:00,481 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-20 18:05:00,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-20 18:05:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:05:00,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136610904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:05:00,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:05:00,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 9] total 33 [2022-03-20 18:05:00,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:05:00,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [558556362] [2022-03-20 18:05:00,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [558556362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:05:00,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:05:00,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:05:00,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880793835] [2022-03-20 18:05:00,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:05:00,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 18:05:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:00,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 18:05:00,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:05:00,570 INFO L87 Difference]: Start difference. First operand 6745 states and 8055 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:05:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:05:16,994 INFO L93 Difference]: Finished difference Result 12002 states and 14266 transitions. [2022-03-20 18:05:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:05:16,995 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:05:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:05:17,011 INFO L225 Difference]: With dead ends: 12002 [2022-03-20 18:05:17,012 INFO L226 Difference]: Without dead ends: 10959 [2022-03-20 18:05:17,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:05:17,017 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 338 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:05:17,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 57 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:05:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10959 states. [2022-03-20 18:05:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10959 to 8229. [2022-03-20 18:05:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8224 states have (on average 1.1904182879377432) internal successors, (9790), 8224 states have internal predecessors, (9790), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:05:28,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 9794 transitions. [2022-03-20 18:05:28,244 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 9794 transitions. Word has length 102 [2022-03-20 18:05:28,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:05:28,244 INFO L478 AbstractCegarLoop]: Abstraction has 8229 states and 9794 transitions. [2022-03-20 18:05:28,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:05:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 9794 transitions. [2022-03-20 18:05:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:05:28,251 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:05:28,251 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:05:28,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-20 18:05:28,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:05:28,452 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:05:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:05:28,452 INFO L85 PathProgramCache]: Analyzing trace with hash 639581642, now seen corresponding path program 85 times [2022-03-20 18:05:28,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:28,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1957588004] [2022-03-20 18:05:28,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:05:28,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:05:28,453 INFO L85 PathProgramCache]: Analyzing trace with hash 639581642, now seen corresponding path program 86 times [2022-03-20 18:05:28,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:05:28,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479958009] [2022-03-20 18:05:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:05:28,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:05:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:29,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:05:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 128 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-03-20 18:05:29,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:05:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479958009] [2022-03-20 18:05:29,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479958009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:05:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948451725] [2022-03-20 18:05:29,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:05:29,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:05:29,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:05:29,203 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:05:29,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 18:05:29,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:05:29,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:05:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 18:05:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:05:29,958 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 18:05:29,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-20 18:05:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:05:30,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:05:30,236 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-20 18:05:30,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-20 18:05:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:05:30,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948451725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:05:30,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:05:30,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 35 [2022-03-20 18:05:30,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:05:30,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1957588004] [2022-03-20 18:05:30,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1957588004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:05:30,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:05:30,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:05:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129595351] [2022-03-20 18:05:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:05:30,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:05:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:05:30,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 18:05:30,327 INFO L87 Difference]: Start difference. First operand 8229 states and 9794 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:05:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:05:48,421 INFO L93 Difference]: Finished difference Result 13381 states and 15863 transitions. [2022-03-20 18:05:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:05:48,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:05:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:05:48,438 INFO L225 Difference]: With dead ends: 13381 [2022-03-20 18:05:48,438 INFO L226 Difference]: Without dead ends: 12350 [2022-03-20 18:05:48,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:05:48,442 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 317 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:05:48,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 68 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:05:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12350 states. [2022-03-20 18:06:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12350 to 9611. [2022-03-20 18:06:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9611 states, 9606 states have (on average 1.189256714553404) internal successors, (11424), 9606 states have internal predecessors, (11424), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9611 states to 9611 states and 11428 transitions. [2022-03-20 18:06:00,989 INFO L78 Accepts]: Start accepts. Automaton has 9611 states and 11428 transitions. Word has length 102 [2022-03-20 18:06:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:06:00,989 INFO L478 AbstractCegarLoop]: Abstraction has 9611 states and 11428 transitions. [2022-03-20 18:06:00,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 9611 states and 11428 transitions. [2022-03-20 18:06:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:06:00,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:06:00,998 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:06:01,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-20 18:06:01,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:01,198 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:06:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:06:01,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1747587194, now seen corresponding path program 87 times [2022-03-20 18:06:01,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:01,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1827968704] [2022-03-20 18:06:01,199 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:06:01,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:06:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1747587194, now seen corresponding path program 88 times [2022-03-20 18:06:01,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:06:01,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376420464] [2022-03-20 18:06:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:06:01,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:06:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:01,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:06:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 149 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 18:06:01,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:06:01,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376420464] [2022-03-20 18:06:01,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376420464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:06:01,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210686822] [2022-03-20 18:06:01,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:06:01,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:01,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:06:01,956 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:06:01,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 18:06:02,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:06:02,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:06:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 18:06:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:06:02,669 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 18:06:02,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-20 18:06:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-03-20 18:06:02,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:06:02,937 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-20 18:06:02,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-20 18:06:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:06:03,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210686822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:06:03,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:06:03,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10, 9] total 37 [2022-03-20 18:06:03,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:06:03,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1827968704] [2022-03-20 18:06:03,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1827968704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:06:03,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:06:03,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:06:03,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325079034] [2022-03-20 18:06:03,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:06:03,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 18:06:03,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:03,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 18:06:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:06:03,027 INFO L87 Difference]: Start difference. First operand 9611 states and 11428 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:22,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:06:22,699 INFO L93 Difference]: Finished difference Result 14679 states and 17385 transitions. [2022-03-20 18:06:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 18:06:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:06:22,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:06:22,717 INFO L225 Difference]: With dead ends: 14679 [2022-03-20 18:06:22,718 INFO L226 Difference]: Without dead ends: 13660 [2022-03-20 18:06:22,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=429, Invalid=2763, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:06:22,722 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 344 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:06:22,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 77 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:06:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13660 states. [2022-03-20 18:06:36,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13660 to 10981. [2022-03-20 18:06:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10981 states, 10976 states have (on average 1.188411078717201) internal successors, (13044), 10976 states have internal predecessors, (13044), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10981 states to 10981 states and 13048 transitions. [2022-03-20 18:06:36,955 INFO L78 Accepts]: Start accepts. Automaton has 10981 states and 13048 transitions. Word has length 102 [2022-03-20 18:06:36,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:06:36,956 INFO L478 AbstractCegarLoop]: Abstraction has 10981 states and 13048 transitions. [2022-03-20 18:06:36,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10981 states and 13048 transitions. [2022-03-20 18:06:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:06:36,965 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:06:36,965 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:06:36,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-20 18:06:37,165 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:37,166 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:06:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:06:37,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1445242374, now seen corresponding path program 89 times [2022-03-20 18:06:37,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:37,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1624888263] [2022-03-20 18:06:37,167 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:06:37,167 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:06:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1445242374, now seen corresponding path program 90 times [2022-03-20 18:06:37,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:06:37,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067880171] [2022-03-20 18:06:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:06:37,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:06:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:37,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:06:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 44 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-20 18:06:37,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:06:37,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067880171] [2022-03-20 18:06:37,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067880171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:06:37,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467996071] [2022-03-20 18:06:37,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:06:37,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:37,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:06:37,728 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:06:37,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-20 18:06:38,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 18:06:38,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:06:38,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 18:06:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:06:38,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 18:06:38,618 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 18:06:38,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-20 18:06:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-03-20 18:06:38,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:06:38,869 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-20 18:06:38,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-20 18:06:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:06:38,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467996071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:06:38,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:06:38,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 25 [2022-03-20 18:06:38,961 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:06:38,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1624888263] [2022-03-20 18:06:38,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1624888263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:06:38,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:06:38,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:06:38,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841178881] [2022-03-20 18:06:38,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:06:38,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:06:38,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:38,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:06:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:06:38,961 INFO L87 Difference]: Start difference. First operand 10981 states and 13048 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:06:57,455 INFO L93 Difference]: Finished difference Result 14554 states and 17182 transitions. [2022-03-20 18:06:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:06:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:06:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:06:57,474 INFO L225 Difference]: With dead ends: 14554 [2022-03-20 18:06:57,474 INFO L226 Difference]: Without dead ends: 13406 [2022-03-20 18:06:57,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 18:06:57,479 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 179 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:06:57,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 58 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:06:57,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13406 states. [2022-03-20 18:07:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13406 to 11672. [2022-03-20 18:07:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11672 states, 11667 states have (on average 1.187794634439016) internal successors, (13858), 11667 states have internal predecessors, (13858), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11672 states to 11672 states and 13862 transitions. [2022-03-20 18:07:12,675 INFO L78 Accepts]: Start accepts. Automaton has 11672 states and 13862 transitions. Word has length 102 [2022-03-20 18:07:12,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:07:12,675 INFO L478 AbstractCegarLoop]: Abstraction has 11672 states and 13862 transitions. [2022-03-20 18:07:12,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 11672 states and 13862 transitions. [2022-03-20 18:07:12,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:07:12,684 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:07:12,684 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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, 1, 1, 1] [2022-03-20 18:07:12,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-20 18:07:12,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:12,885 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:07:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:07:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash 168583758, now seen corresponding path program 91 times [2022-03-20 18:07:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:12,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [559392735] [2022-03-20 18:07:12,886 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:07:12,886 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:07:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash 168583758, now seen corresponding path program 92 times [2022-03-20 18:07:12,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:07:12,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186916124] [2022-03-20 18:07:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:07:12,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:07:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:07:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 18:07:13,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:07:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186916124] [2022-03-20 18:07:13,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186916124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:07:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551643977] [2022-03-20 18:07:13,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:07:13,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:13,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:07:13,226 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:07:13,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-20 18:07:13,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:07:13,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:07:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 18:07:13,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:07:14,051 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:07:14,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 18:07:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 18:07:14,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:07:18,698 INFO L356 Elim1Store]: treesize reduction 31, result has 68.0 percent of original size [2022-03-20 18:07:18,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 73 [2022-03-20 18:07:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 68 proven. 55 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 18:07:18,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551643977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:07:18,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:07:18,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 35 [2022-03-20 18:07:18,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:07:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [559392735] [2022-03-20 18:07:18,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [559392735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:07:18,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:07:18,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:07:18,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216170356] [2022-03-20 18:07:18,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:07:18,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:07:18,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:07:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1047, Unknown=7, NotChecked=0, Total=1190 [2022-03-20 18:07:18,839 INFO L87 Difference]: Start difference. First operand 11672 states and 13862 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:07:33,930 INFO L93 Difference]: Finished difference Result 15014 states and 17795 transitions. [2022-03-20 18:07:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:07:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:07:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:07:33,946 INFO L225 Difference]: With dead ends: 15014 [2022-03-20 18:07:33,946 INFO L226 Difference]: Without dead ends: 11159 [2022-03-20 18:07:33,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=190, Invalid=1525, Unknown=7, NotChecked=0, Total=1722 [2022-03-20 18:07:33,954 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:07:33,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 65 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:07:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11159 states. [2022-03-20 18:07:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11159 to 11141. [2022-03-20 18:07:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11141 states, 11136 states have (on average 1.1848958333333333) internal successors, (13195), 11136 states have internal predecessors, (13195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11141 states to 11141 states and 13199 transitions. [2022-03-20 18:07:48,684 INFO L78 Accepts]: Start accepts. Automaton has 11141 states and 13199 transitions. Word has length 102 [2022-03-20 18:07:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:07:48,684 INFO L478 AbstractCegarLoop]: Abstraction has 11141 states and 13199 transitions. [2022-03-20 18:07:48,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 11141 states and 13199 transitions. [2022-03-20 18:07:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:07:48,692 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:07:48,692 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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, 1, 1, 1] [2022-03-20 18:07:48,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-20 18:07:48,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-20 18:07:48,892 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:07:48,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:07:48,892 INFO L85 PathProgramCache]: Analyzing trace with hash 201885714, now seen corresponding path program 93 times [2022-03-20 18:07:48,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:48,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1889594703] [2022-03-20 18:07:48,893 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:07:48,893 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:07:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash 201885714, now seen corresponding path program 94 times [2022-03-20 18:07:48,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:07:48,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167570187] [2022-03-20 18:07:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:07:48,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:07:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:49,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:07:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-20 18:07:49,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:07:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167570187] [2022-03-20 18:07:49,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167570187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:07:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335535935] [2022-03-20 18:07:49,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:07:49,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:49,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:07:49,384 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:07:49,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-20 18:07:49,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:07:49,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:07:49,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 18:07:49,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:07:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 18:07:51,360 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:07:51,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-03-20 18:07:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 266 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 18:07:51,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:07:57,953 INFO L356 Elim1Store]: treesize reduction 31, result has 68.0 percent of original size [2022-03-20 18:07:57,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 73 [2022-03-20 18:07:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 170 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 18:07:58,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335535935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:07:58,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:07:58,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 35, 26] total 73 [2022-03-20 18:07:58,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:07:58,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1889594703] [2022-03-20 18:07:58,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1889594703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:07:58,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:07:58,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:07:58,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018654910] [2022-03-20 18:07:58,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:07:58,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:07:58,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:58,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:07:58,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=4755, Unknown=8, NotChecked=0, Total=5256 [2022-03-20 18:07:58,240 INFO L87 Difference]: Start difference. First operand 11141 states and 13199 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:08:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:08:14,072 INFO L93 Difference]: Finished difference Result 14829 states and 17528 transitions. [2022-03-20 18:08:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:08:14,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:08:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:08:14,087 INFO L225 Difference]: With dead ends: 14829 [2022-03-20 18:08:14,088 INFO L226 Difference]: Without dead ends: 11353 [2022-03-20 18:08:14,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=642, Invalid=6490, Unknown=8, NotChecked=0, Total=7140 [2022-03-20 18:08:14,094 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:08:14,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 90 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:08:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11353 states. [2022-03-20 18:08:28,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11353 to 10772. [2022-03-20 18:08:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10767 states have (on average 1.191232469582985) internal successors, (12826), 10767 states have internal predecessors, (12826), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:08:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 12830 transitions. [2022-03-20 18:08:28,885 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 12830 transitions. Word has length 102 [2022-03-20 18:08:28,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:08:28,885 INFO L478 AbstractCegarLoop]: Abstraction has 10772 states and 12830 transitions. [2022-03-20 18:08:28,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:08:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 12830 transitions. [2022-03-20 18:08:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:08:28,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:08:28,892 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 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, 1, 1, 1] [2022-03-20 18:08:28,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-20 18:08:29,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-20 18:08:29,092 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:08:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:08:29,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1771781870, now seen corresponding path program 95 times [2022-03-20 18:08:29,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:29,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1623556509] [2022-03-20 18:08:29,094 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:08:29,094 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:08:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1771781870, now seen corresponding path program 96 times [2022-03-20 18:08:29,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:08:29,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383297186] [2022-03-20 18:08:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:08:29,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:08:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:29,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:08:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 18:08:29,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:08:29,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383297186] [2022-03-20 18:08:29,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383297186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:08:29,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560289456] [2022-03-20 18:08:29,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:08:29,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:08:29,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:08:29,661 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:08:29,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-20 18:08:31,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 18:08:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:08:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 18:08:31,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:08:31,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 18:08:31,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:31,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:31,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:31,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:31,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:31,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:31,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:31,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:31,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:31,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:31,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-20 18:08:34,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 18:08:34,168 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:08:34,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 43 [2022-03-20 18:08:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 18:08:34,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:08:38,716 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_mod_aux_mod_main_~j~0_32_52 Int) (v_ArrVal_5004 (Array Int Int)) (aux_div_aux_mod_main_~j~0_32_52 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_main_~j~0_32_52 4294967296) aux_mod_aux_mod_main_~j~0_32_52)) (.cse1 (select v_ArrVal_5004 |c_main_~#string_entrada~0.offset|)) (.cse2 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_5004) |c_main_~#vetor_vogais~0.base|))) (or (<= 8589934591 .cse0) (< .cse0 4294967305) (< aux_mod_aux_mod_main_~j~0_32_52 0) (= .cse1 0) (< (select .cse2 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= 10 aux_mod_aux_mod_main_~j~0_32_52) (< .cse1 (select .cse2 (+ (mod aux_mod_aux_mod_main_~j~0_32_52 4294967296) |c_main_~#vetor_vogais~0.offset|))) (not (= (select v_ArrVal_5004 (+ |c_main_~#string_entrada~0.offset| 1)) 0))))) is different from false [2022-03-20 18:08:40,493 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((aux_mod_aux_mod_main_~j~0_32_52 Int) (v_ArrVal_5004 (Array Int Int)) (aux_div_aux_mod_main_~j~0_32_52 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_main_~j~0_32_52 4294967296) aux_mod_aux_mod_main_~j~0_32_52)) (.cse1 (select v_ArrVal_5004 |c_main_~#string_entrada~0.offset|)) (.cse2 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_5004) |c_main_~#vetor_vogais~0.base|))) (or (<= 8589934591 .cse0) (< .cse0 4294967305) (< aux_mod_aux_mod_main_~j~0_32_52 0) (= .cse1 0) (< (select .cse2 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= 10 aux_mod_aux_mod_main_~j~0_32_52) (< .cse1 (select .cse2 (+ (mod aux_mod_aux_mod_main_~j~0_32_52 4294967296) |c_main_~#vetor_vogais~0.offset|))) (not (= (select v_ArrVal_5004 (+ |c_main_~#string_entrada~0.offset| 1)) 0)))))) is different from false [2022-03-20 18:08:40,614 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((aux_mod_aux_mod_main_~j~0_32_52 Int) (v_ArrVal_5004 (Array Int Int)) (aux_div_aux_mod_main_~j~0_32_52 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_main_~j~0_32_52 4294967296) aux_mod_aux_mod_main_~j~0_32_52)) (.cse1 (select v_ArrVal_5004 |c_main_~#string_entrada~0.offset|)) (.cse2 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_5004) |c_main_~#vetor_vogais~0.base|))) (or (<= 8589934591 .cse0) (< .cse0 4294967305) (< aux_mod_aux_mod_main_~j~0_32_52 0) (= .cse1 0) (< (select .cse2 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= 10 aux_mod_aux_mod_main_~j~0_32_52) (< .cse1 (select .cse2 (+ (mod aux_mod_aux_mod_main_~j~0_32_52 4294967296) |c_main_~#vetor_vogais~0.offset|))) (not (= (select v_ArrVal_5004 (+ |c_main_~#string_entrada~0.offset| 1)) 0)))))) is different from false [2022-03-20 18:08:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 230 trivial. 44 not checked. [2022-03-20 18:08:40,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560289456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:08:40,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:08:40,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 24] total 62 [2022-03-20 18:08:40,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:08:40,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1623556509] [2022-03-20 18:08:40,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1623556509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:08:40,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:08:40,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:08:40,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161513624] [2022-03-20 18:08:40,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:08:40,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:08:40,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:40,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:08:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=2939, Unknown=3, NotChecked=348, Total=3782 [2022-03-20 18:08:40,767 INFO L87 Difference]: Start difference. First operand 10772 states and 12830 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:08:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:08:56,991 INFO L93 Difference]: Finished difference Result 11550 states and 13749 transitions. [2022-03-20 18:08:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:08:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:08:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:08:57,005 INFO L225 Difference]: With dead ends: 11550 [2022-03-20 18:08:57,006 INFO L226 Difference]: Without dead ends: 10979 [2022-03-20 18:08:57,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=627, Invalid=4638, Unknown=3, NotChecked=432, Total=5700 [2022-03-20 18:08:57,008 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 84 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:08:57,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 97 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:08:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2022-03-20 18:09:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 10529. [2022-03-20 18:09:10,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10529 states, 10524 states have (on average 1.1952679589509692) internal successors, (12579), 10524 states have internal predecessors, (12579), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10529 states to 10529 states and 12583 transitions. [2022-03-20 18:09:10,966 INFO L78 Accepts]: Start accepts. Automaton has 10529 states and 12583 transitions. Word has length 102 [2022-03-20 18:09:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:09:10,967 INFO L478 AbstractCegarLoop]: Abstraction has 10529 states and 12583 transitions. [2022-03-20 18:09:10,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 10529 states and 12583 transitions. [2022-03-20 18:09:10,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:09:10,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:09:10,972 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:09:10,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-20 18:09:11,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:11,173 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:09:11,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:09:11,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1680669622, now seen corresponding path program 97 times [2022-03-20 18:09:11,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:11,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1737279088] [2022-03-20 18:09:11,174 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:09:11,174 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:09:11,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1680669622, now seen corresponding path program 98 times [2022-03-20 18:09:11,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:09:11,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956174885] [2022-03-20 18:09:11,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:09:11,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:09:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:11,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:09:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 86 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-20 18:09:11,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:09:11,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956174885] [2022-03-20 18:09:11,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956174885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:09:11,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772141702] [2022-03-20 18:09:11,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:09:11,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:11,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:09:11,697 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:09:11,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-20 18:09:11,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:09:11,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:09:11,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 18:09:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:09:12,395 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 18:09:12,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-20 18:09:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:09:12,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:09:12,649 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-20 18:09:12,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-20 18:09:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:09:12,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772141702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:09:12,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:09:12,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 31 [2022-03-20 18:09:12,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:09:12,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1737279088] [2022-03-20 18:09:12,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1737279088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:09:12,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:09:12,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:09:12,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349859625] [2022-03-20 18:09:12,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:09:12,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:09:12,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:09:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:09:12,759 INFO L87 Difference]: Start difference. First operand 10529 states and 12583 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:09:30,282 INFO L93 Difference]: Finished difference Result 13369 states and 15961 transitions. [2022-03-20 18:09:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:09:30,283 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:09:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:09:30,297 INFO L225 Difference]: With dead ends: 13369 [2022-03-20 18:09:30,297 INFO L226 Difference]: Without dead ends: 11988 [2022-03-20 18:09:30,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:09:30,300 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 209 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:09:30,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 61 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:09:30,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11988 states. [2022-03-20 18:09:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11988 to 10475. [2022-03-20 18:09:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10475 states, 10470 states have (on average 1.1917860553963706) internal successors, (12478), 10470 states have internal predecessors, (12478), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10475 states to 10475 states and 12482 transitions. [2022-03-20 18:09:44,022 INFO L78 Accepts]: Start accepts. Automaton has 10475 states and 12482 transitions. Word has length 102 [2022-03-20 18:09:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:09:44,023 INFO L478 AbstractCegarLoop]: Abstraction has 10475 states and 12482 transitions. [2022-03-20 18:09:44,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 10475 states and 12482 transitions. [2022-03-20 18:09:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:09:44,028 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:09:44,028 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 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, 1, 1] [2022-03-20 18:09:44,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-20 18:09:44,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:44,229 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:09:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:09:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash 879787466, now seen corresponding path program 99 times [2022-03-20 18:09:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:44,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1944864135] [2022-03-20 18:09:44,230 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:09:44,230 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:09:44,230 INFO L85 PathProgramCache]: Analyzing trace with hash 879787466, now seen corresponding path program 100 times [2022-03-20 18:09:44,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:09:44,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361465818] [2022-03-20 18:09:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:09:44,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:09:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:44,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:09:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-03-20 18:09:44,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:09:44,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361465818] [2022-03-20 18:09:44,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361465818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:09:44,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310395931] [2022-03-20 18:09:44,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:09:44,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:44,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:09:44,553 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:09:44,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-20 18:09:44,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:09:44,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:09:44,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 18:09:44,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:09:45,285 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 18:09:45,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-20 18:09:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-03-20 18:09:45,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:09:45,543 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-20 18:09:45,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-20 18:09:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-20 18:09:45,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310395931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:09:45,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:09:45,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-03-20 18:09:45,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:09:45,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1944864135] [2022-03-20 18:09:45,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1944864135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:09:45,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:09:45,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:09:45,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819393433] [2022-03-20 18:09:45,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:09:45,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:09:45,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:45,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:09:45,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:09:45,650 INFO L87 Difference]: Start difference. First operand 10475 states and 12482 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:10:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:10:00,058 INFO L93 Difference]: Finished difference Result 10948 states and 13029 transitions. [2022-03-20 18:10:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 18:10:00,058 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:10:00,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:10:00,070 INFO L225 Difference]: With dead ends: 10948 [2022-03-20 18:10:00,071 INFO L226 Difference]: Without dead ends: 10621 [2022-03-20 18:10:00,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:10:00,073 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:10:00,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 61 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:10:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10621 states. [2022-03-20 18:10:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10621 to 10478. [2022-03-20 18:10:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10478 states, 10473 states have (on average 1.190871765492218) internal successors, (12472), 10473 states have internal predecessors, (12472), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:10:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10478 states to 10478 states and 12476 transitions. [2022-03-20 18:10:13,967 INFO L78 Accepts]: Start accepts. Automaton has 10478 states and 12476 transitions. Word has length 102 [2022-03-20 18:10:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:10:13,967 INFO L478 AbstractCegarLoop]: Abstraction has 10478 states and 12476 transitions. [2022-03-20 18:10:13,967 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:10:13,967 INFO L276 IsEmpty]: Start isEmpty. Operand 10478 states and 12476 transitions. [2022-03-20 18:10:13,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:10:13,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:10:13,972 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 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, 1, 1, 1] [2022-03-20 18:10:13,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-20 18:10:14,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-20 18:10:14,174 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:10:14,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:10:14,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048434, now seen corresponding path program 101 times [2022-03-20 18:10:14,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:10:14,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220605263] [2022-03-20 18:10:14,175 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:10:14,176 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:10:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048434, now seen corresponding path program 102 times [2022-03-20 18:10:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:10:14,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490109764] [2022-03-20 18:10:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:10:14,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:10:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:10:16,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:10:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:10:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 76 proven. 185 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 18:10:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:10:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490109764] [2022-03-20 18:10:16,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490109764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:10:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930750919] [2022-03-20 18:10:16,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:10:16,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:10:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:10:16,027 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:10:16,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-20 18:10:16,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 18:10:16,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:10:16,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 18:10:16,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:10:17,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-20 18:10:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 85 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-03-20 18:10:18,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:10:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 55 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-03-20 18:10:34,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930750919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:10:34,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:10:34,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 20, 17] total 64 [2022-03-20 18:10:34,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:10:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220605263] [2022-03-20 18:10:34,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220605263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:10:34,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:10:34,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:10:34,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263644239] [2022-03-20 18:10:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:10:34,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 18:10:34,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:10:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 18:10:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=3631, Unknown=17, NotChecked=0, Total=4032 [2022-03-20 18:10:34,416 INFO L87 Difference]: Start difference. First operand 10478 states and 12476 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)