/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/eureka_05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:29:54,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:29:54,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:29:54,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:29:54,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:29:54,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:29:54,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:29:54,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:29:54,311 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:29:54,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:29:54,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:29:54,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:29:54,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:29:54,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:29:54,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:29:54,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:29:54,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:29:54,313 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:29:54,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:29:54,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:29:54,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:29:54,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:29:54,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:29:54,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:29:54,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:29:54,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:29:54,314 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:29:54,315 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:29:54,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:29:54,315 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:29:54,315 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:29:54,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:29:54,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:29:54,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:29:54,496 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:29:54,497 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:29:54,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2022-04-06 19:29:54,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfae228d/32af7f8a75894fee8e769567778f9f57/FLAG85d048c5b [2022-04-06 19:29:54,826 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:29:54,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i [2022-04-06 19:29:54,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfae228d/32af7f8a75894fee8e769567778f9f57/FLAG85d048c5b [2022-04-06 19:29:55,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfae228d/32af7f8a75894fee8e769567778f9f57 [2022-04-06 19:29:55,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:29:55,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:29:55,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:29:55,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:29:55,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:29:55,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f08339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55, skipping insertion in model container [2022-04-06 19:29:55,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:29:55,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:29:55,420 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/eureka_05.i[810,823] [2022-04-06 19:29:55,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:29:55,446 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:29:55,455 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/eureka_05.i[810,823] [2022-04-06 19:29:55,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:29:55,485 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:29:55,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55 WrapperNode [2022-04-06 19:29:55,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:29:55,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:29:55,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:29:55,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:29:55,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:29:55,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:29:55,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:29:55,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:29:55,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:29:55,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:55,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 19:29:55,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 19:29:55,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:29:55,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:29:55,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:29:55,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:29:55,583 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2022-04-06 19:29:55,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:29:55,583 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:29:55,583 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:29:55,583 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 19:29:55,583 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 19:29:55,583 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:29:55,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:29:55,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:29:55,584 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2022-04-06 19:29:55,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:29:55,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:29:55,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:29:55,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 19:29:55,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:29:55,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:29:55,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:29:55,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:29:55,633 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:29:55,634 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:29:55,738 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:29:55,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:29:55,742 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-04-06 19:29:55,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:29:55 BoogieIcfgContainer [2022-04-06 19:29:55,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:29:55,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:29:55,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:29:55,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:29:55,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:29:55" (1/3) ... [2022-04-06 19:29:55,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9756c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:29:55, skipping insertion in model container [2022-04-06 19:29:55,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (2/3) ... [2022-04-06 19:29:55,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9756c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:29:55, skipping insertion in model container [2022-04-06 19:29:55,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:29:55" (3/3) ... [2022-04-06 19:29:55,750 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2022-04-06 19:29:55,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:29:55,753 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:29:55,784 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:29:55,788 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 19:29:55,789 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:29:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:29:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 19:29:55,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:55,805 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:55,805 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:55,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:55,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1995632546, now seen corresponding path program 1 times [2022-04-06 19:29:55,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:55,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [446515707] [2022-04-06 19:29:55,833 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:29:55,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1995632546, now seen corresponding path program 2 times [2022-04-06 19:29:55,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:55,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166601308] [2022-04-06 19:29:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:55,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:29:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:55,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166601308] [2022-04-06 19:29:55,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166601308] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:55,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:55,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:55,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:55,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [446515707] [2022-04-06 19:29:55,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [446515707] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:55,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:55,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:55,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908323003] [2022-04-06 19:29:55,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:55,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:29:55,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:29:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:29:56,009 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:56,118 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2022-04-06 19:29:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:29:56,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-06 19:29:56,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:56,131 INFO L225 Difference]: With dead ends: 77 [2022-04-06 19:29:56,132 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 19:29:56,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:29:56,140 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:56,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:29:56,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 19:29:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-04-06 19:29:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:29:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-04-06 19:29:56,168 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2022-04-06 19:29:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:56,168 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-04-06 19:29:56,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-04-06 19:29:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 19:29:56,169 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:56,169 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:56,169 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:29:56,170 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:56,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1221136232, now seen corresponding path program 1 times [2022-04-06 19:29:56,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1659134977] [2022-04-06 19:29:56,171 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:29:56,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1221136232, now seen corresponding path program 2 times [2022-04-06 19:29:56,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:56,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519276960] [2022-04-06 19:29:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:56,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 19:29:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:56,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:56,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519276960] [2022-04-06 19:29:56,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519276960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:56,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:56,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:29:56,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:56,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1659134977] [2022-04-06 19:29:56,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1659134977] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:56,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:56,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:29:56,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176577915] [2022-04-06 19:29:56,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:56,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:29:56,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:29:56,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:29:56,255 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:56,392 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-04-06 19:29:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:29:56,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-06 19:29:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:56,401 INFO L225 Difference]: With dead ends: 59 [2022-04-06 19:29:56,401 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 19:29:56,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:29:56,405 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:56,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 25 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:29:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 19:29:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-04-06 19:29:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:29:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-04-06 19:29:56,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-04-06 19:29:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:56,422 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-04-06 19:29:56,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:56,423 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-04-06 19:29:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 19:29:56,424 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:56,424 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:56,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:29:56,424 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:56,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:56,426 INFO L85 PathProgramCache]: Analyzing trace with hash -957735862, now seen corresponding path program 1 times [2022-04-06 19:29:56,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [154913027] [2022-04-06 19:29:56,432 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:56,432 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash -957735862, now seen corresponding path program 2 times [2022-04-06 19:29:56,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:56,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085253358] [2022-04-06 19:29:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:56,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:29:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:56,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:56,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085253358] [2022-04-06 19:29:56,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085253358] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:56,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529611272] [2022-04-06 19:29:56,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:29:56,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:56,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:56,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:29:56,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:29:56,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 19:29:56,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:56,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 19:29:56,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:56,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:29:56,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529611272] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:56,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:29:56,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-04-06 19:29:56,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [154913027] [2022-04-06 19:29:56,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [154913027] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:56,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:56,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:56,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662187391] [2022-04-06 19:29:56,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:56,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:29:56,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:29:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:29:56,718 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:56,762 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-04-06 19:29:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:29:56,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-06 19:29:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:56,763 INFO L225 Difference]: With dead ends: 49 [2022-04-06 19:29:56,763 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 19:29:56,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:29:56,764 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:56,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 19:29:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-04-06 19:29:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:29:56,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-04-06 19:29:56,776 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2022-04-06 19:29:56,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:56,777 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-04-06 19:29:56,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-04-06 19:29:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 19:29:56,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:56,777 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:56,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 19:29:56,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:56,995 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:56,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1438458526, now seen corresponding path program 1 times [2022-04-06 19:29:56,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1216531368] [2022-04-06 19:29:56,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:56,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:56,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1438458526, now seen corresponding path program 2 times [2022-04-06 19:29:56,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:56,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115233460] [2022-04-06 19:29:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:56,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:57,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:57,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:29:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:57,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:57,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115233460] [2022-04-06 19:29:57,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115233460] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:57,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094805483] [2022-04-06 19:29:57,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:29:57,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:57,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:57,085 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:29:57,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:29:57,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:29:57,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:57,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 19:29:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:57,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:57,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094805483] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:57,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:57,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-04-06 19:29:57,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1216531368] [2022-04-06 19:29:57,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1216531368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:57,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:57,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:29:57,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99466171] [2022-04-06 19:29:57,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:57,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:29:57,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:29:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:29:57,248 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:57,350 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-04-06 19:29:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:29:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-06 19:29:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:57,351 INFO L225 Difference]: With dead ends: 60 [2022-04-06 19:29:57,352 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 19:29:57,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:29:57,355 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:57,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 25 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:57,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 19:29:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-04-06 19:29:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:29:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-06 19:29:57,367 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2022-04-06 19:29:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:57,368 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-06 19:29:57,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-06 19:29:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 19:29:57,369 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:57,369 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:57,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 19:29:57,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 19:29:57,583 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash -911525692, now seen corresponding path program 3 times [2022-04-06 19:29:57,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:57,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1994209621] [2022-04-06 19:29:57,585 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:57,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:57,585 INFO L85 PathProgramCache]: Analyzing trace with hash -911525692, now seen corresponding path program 4 times [2022-04-06 19:29:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:57,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214769307] [2022-04-06 19:29:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:57,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:57,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:57,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:29:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:29:57,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214769307] [2022-04-06 19:29:57,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214769307] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488734806] [2022-04-06 19:29:57,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:29:57,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:57,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:29:57,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:29:57,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:29:57,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:57,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 19:29:57,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:57,785 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 15 treesize of output 11 [2022-04-06 19:29:58,001 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 19:29:58,001 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 23 treesize of output 10 [2022-04-06 19:29:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:58,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:29:58,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488734806] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:58,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:29:58,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 12] total 24 [2022-04-06 19:29:58,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1994209621] [2022-04-06 19:29:58,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1994209621] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:58,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:58,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:29:58,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102631197] [2022-04-06 19:29:58,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:58,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:29:58,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:58,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:29:58,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:29:58,372 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:58,479 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-04-06 19:29:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:29:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-04-06 19:29:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:58,481 INFO L225 Difference]: With dead ends: 58 [2022-04-06 19:29:58,482 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 19:29:58,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:29:58,484 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:58,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 158 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 76 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-04-06 19:29:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 19:29:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2022-04-06 19:29:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 19:29:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-04-06 19:29:58,503 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2022-04-06 19:29:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:58,503 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-04-06 19:29:58,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-04-06 19:29:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 19:29:58,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:58,504 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:58,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:29:58,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:58,710 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash -588044416, now seen corresponding path program 1 times [2022-04-06 19:29:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:58,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1243335821] [2022-04-06 19:29:58,711 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:58,711 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash -588044416, now seen corresponding path program 2 times [2022-04-06 19:29:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:58,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926341147] [2022-04-06 19:29:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:58,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:29:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:29:58,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926341147] [2022-04-06 19:29:58,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926341147] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025284141] [2022-04-06 19:29:58,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:29:58,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:58,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:58,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:29:58,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:29:58,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:29:58,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:58,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:29:58,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:29:58,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:29:59,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025284141] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:59,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:59,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2022-04-06 19:29:59,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1243335821] [2022-04-06 19:29:59,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1243335821] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:59,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:59,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:29:59,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224607878] [2022-04-06 19:29:59,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:59,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:29:59,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:59,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:29:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:29:59,035 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:59,190 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2022-04-06 19:29:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:29:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-04-06 19:29:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:59,192 INFO L225 Difference]: With dead ends: 86 [2022-04-06 19:29:59,193 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 19:29:59,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:29:59,194 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:59,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 29 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:29:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 19:29:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-04-06 19:29:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 46 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 19:29:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-04-06 19:29:59,209 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 29 [2022-04-06 19:29:59,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:59,209 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-04-06 19:29:59,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-04-06 19:29:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:29:59,210 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:59,210 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 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] [2022-04-06 19:29:59,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 19:29:59,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:59,423 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1608016792, now seen corresponding path program 3 times [2022-04-06 19:29:59,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:59,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1181563626] [2022-04-06 19:29:59,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:59,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1608016792, now seen corresponding path program 4 times [2022-04-06 19:29:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:59,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354828346] [2022-04-06 19:29:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:59,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:59,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:29:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 19:29:59,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:59,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354828346] [2022-04-06 19:29:59,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354828346] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579678688] [2022-04-06 19:29:59,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:29:59,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:59,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:59,499 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:29:59,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:29:59,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:29:59,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:59,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:29:59,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:29:59,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:29:59,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579678688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:59,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:29:59,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2022-04-06 19:29:59,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:59,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1181563626] [2022-04-06 19:29:59,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1181563626] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:59,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:59,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:29:59,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933947443] [2022-04-06 19:29:59,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:59,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:29:59,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:59,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:29:59,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:29:59,636 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 19:29:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:59,669 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2022-04-06 19:29:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:29:59,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-04-06 19:29:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:59,671 INFO L225 Difference]: With dead ends: 85 [2022-04-06 19:29:59,671 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 19:29:59,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:29:59,672 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:59,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 71 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 19:29:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-04-06 19:29:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:29:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-04-06 19:29:59,693 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2022-04-06 19:29:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:59,693 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-04-06 19:29:59,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 19:29:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-04-06 19:29:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:29:59,694 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:59,694 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 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] [2022-04-06 19:29:59,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 19:29:59,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:59,895 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash 835149208, now seen corresponding path program 5 times [2022-04-06 19:29:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:59,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195501117] [2022-04-06 19:29:59,896 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:59,896 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash 835149208, now seen corresponding path program 6 times [2022-04-06 19:29:59,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:59,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754464287] [2022-04-06 19:29:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:59,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:59,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:29:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:29:59,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:59,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754464287] [2022-04-06 19:29:59,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754464287] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:59,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104796253] [2022-04-06 19:29:59,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:29:59,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:59,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:59,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:29:59,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 19:30:00,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:30:00,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:30:00,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:30:00,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:30:00,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104796253] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:00,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:00,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-04-06 19:30:00,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:00,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195501117] [2022-04-06 19:30:00,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195501117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:00,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:00,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:30:00,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413099048] [2022-04-06 19:30:00,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:00,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:30:00,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:00,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:30:00,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:30:00,234 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:00,449 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-04-06 19:30:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:30:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-04-06 19:30:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:00,450 INFO L225 Difference]: With dead ends: 70 [2022-04-06 19:30:00,450 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 19:30:00,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:30:00,451 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:00,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 29 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 19:30:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-04-06 19:30:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-04-06 19:30:00,458 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 33 [2022-04-06 19:30:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:00,458 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-04-06 19:30:00,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-04-06 19:30:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 19:30:00,459 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:00,459 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:00,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:00,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:00,672 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:00,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1075110444, now seen corresponding path program 7 times [2022-04-06 19:30:00,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:00,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1672352281] [2022-04-06 19:30:00,674 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:00,674 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:00,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1075110444, now seen corresponding path program 8 times [2022-04-06 19:30:00,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:00,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731148154] [2022-04-06 19:30:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:00,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:00,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:00,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 19:30:00,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:00,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731148154] [2022-04-06 19:30:00,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731148154] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:00,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996744843] [2022-04-06 19:30:00,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:00,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:00,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:00,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:00,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 19:30:00,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:00,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:00,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:30:00,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 19:30:00,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 19:30:00,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996744843] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:00,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:00,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-04-06 19:30:00,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:00,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1672352281] [2022-04-06 19:30:00,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1672352281] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:00,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:00,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:30:00,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903912782] [2022-04-06 19:30:00,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:00,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:30:00,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:00,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:30:00,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:30:00,932 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:01,114 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-04-06 19:30:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:30:01,115 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-04-06 19:30:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:01,115 INFO L225 Difference]: With dead ends: 77 [2022-04-06 19:30:01,115 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 19:30:01,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:30:01,116 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:01,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 29 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 19:30:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-04-06 19:30:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-04-06 19:30:01,123 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 36 [2022-04-06 19:30:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:01,123 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-04-06 19:30:01,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:01,123 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-04-06 19:30:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 19:30:01,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:01,124 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:01,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:01,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:01,339 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:01,340 INFO L85 PathProgramCache]: Analyzing trace with hash 482252264, now seen corresponding path program 9 times [2022-04-06 19:30:01,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:01,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [773469807] [2022-04-06 19:30:01,341 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:01,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:01,341 INFO L85 PathProgramCache]: Analyzing trace with hash 482252264, now seen corresponding path program 10 times [2022-04-06 19:30:01,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:01,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632276937] [2022-04-06 19:30:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:01,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:01,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:01,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 19:30:01,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632276937] [2022-04-06 19:30:01,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632276937] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541187584] [2022-04-06 19:30:01,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:01,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:01,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:01,411 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:01,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 19:30:01,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:01,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:01,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:30:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:30:01,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:30:01,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541187584] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:01,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:01,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-04-06 19:30:01,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [773469807] [2022-04-06 19:30:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [773469807] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:01,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:01,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:30:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912329215] [2022-04-06 19:30:01,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:01,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:30:01,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:30:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:30:01,582 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:01,779 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-04-06 19:30:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:30:01,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-04-06 19:30:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:01,784 INFO L225 Difference]: With dead ends: 80 [2022-04-06 19:30:01,784 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 19:30:01,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:30:01,785 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 123 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:01,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 27 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 19:30:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-04-06 19:30:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-04-06 19:30:01,799 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 39 [2022-04-06 19:30:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:01,800 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-04-06 19:30:01,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-04-06 19:30:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 19:30:01,805 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:01,820 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:01,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 19:30:02,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 19:30:02,028 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash -450266964, now seen corresponding path program 11 times [2022-04-06 19:30:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:02,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1868852942] [2022-04-06 19:30:02,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:02,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:02,029 INFO L85 PathProgramCache]: Analyzing trace with hash -450266964, now seen corresponding path program 12 times [2022-04-06 19:30:02,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:02,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021947259] [2022-04-06 19:30:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:02,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:02,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:02,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 19:30:02,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:02,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021947259] [2022-04-06 19:30:02,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021947259] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:02,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688521067] [2022-04-06 19:30:02,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:02,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:02,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:02,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:02,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 19:30:02,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 19:30:02,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:02,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:30:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 19:30:02,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 19:30:02,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688521067] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:02,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:02,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 7] total 19 [2022-04-06 19:30:02,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:02,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1868852942] [2022-04-06 19:30:02,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1868852942] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:02,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:02,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:30:02,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183261047] [2022-04-06 19:30:02,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:02,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:30:02,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:02,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:30:02,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:30:02,452 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:02,658 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-04-06 19:30:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:30:02,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-04-06 19:30:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:02,659 INFO L225 Difference]: With dead ends: 83 [2022-04-06 19:30:02,659 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 19:30:02,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:30:02,660 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 140 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:02,660 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 27 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 19:30:02,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-04-06 19:30:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-04-06 19:30:02,668 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 42 [2022-04-06 19:30:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:02,668 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-04-06 19:30:02,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-04-06 19:30:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 19:30:02,668 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:02,668 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:02,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:02,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:02,883 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1282117784, now seen corresponding path program 13 times [2022-04-06 19:30:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:02,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1425573863] [2022-04-06 19:30:02,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:02,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1282117784, now seen corresponding path program 14 times [2022-04-06 19:30:02,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:02,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471335234] [2022-04-06 19:30:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:02,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:02,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:02,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 19:30:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:02,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471335234] [2022-04-06 19:30:02,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471335234] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:02,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839065683] [2022-04-06 19:30:02,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:02,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:02,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:02,950 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:02,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 19:30:02,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:02,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:02,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:30:03,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 19:30:03,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 19:30:03,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839065683] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:03,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:03,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2022-04-06 19:30:03,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:03,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1425573863] [2022-04-06 19:30:03,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1425573863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:03,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:03,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:30:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23260503] [2022-04-06 19:30:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:03,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:30:03,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:03,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:30:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:30:03,137 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:03,367 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2022-04-06 19:30:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:30:03,368 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-04-06 19:30:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:03,368 INFO L225 Difference]: With dead ends: 87 [2022-04-06 19:30:03,368 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 19:30:03,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:30:03,369 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:03,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 29 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 19:30:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2022-04-06 19:30:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-04-06 19:30:03,387 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 45 [2022-04-06 19:30:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:03,387 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-04-06 19:30:03,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-04-06 19:30:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 19:30:03,388 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:03,388 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:03,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:03,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 19:30:03,603 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1463860828, now seen corresponding path program 15 times [2022-04-06 19:30:03,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:03,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [951900167] [2022-04-06 19:30:03,604 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:03,604 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1463860828, now seen corresponding path program 16 times [2022-04-06 19:30:03,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:03,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831027162] [2022-04-06 19:30:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:03,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:03,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:03,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 19:30:03,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:03,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831027162] [2022-04-06 19:30:03,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831027162] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:03,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272218578] [2022-04-06 19:30:03,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:03,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:03,685 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:03,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 19:30:03,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:03,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:30:03,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 17 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:30:03,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 17 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:30:03,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272218578] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:03,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:03,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2022-04-06 19:30:03,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:03,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [951900167] [2022-04-06 19:30:03,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [951900167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:03,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:03,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:30:03,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532929384] [2022-04-06 19:30:03,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:03,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:30:03,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:30:03,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:30:03,972 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:04,252 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-04-06 19:30:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:30:04,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-04-06 19:30:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:04,253 INFO L225 Difference]: With dead ends: 90 [2022-04-06 19:30:04,253 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 19:30:04,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:30:04,254 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 182 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:04,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 29 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 19:30:04,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-04-06 19:30:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-04-06 19:30:04,262 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 48 [2022-04-06 19:30:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:04,262 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-04-06 19:30:04,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:04,262 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-04-06 19:30:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:30:04,262 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:04,263 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:04,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:04,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 19:30:04,479 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:04,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash 670604008, now seen corresponding path program 17 times [2022-04-06 19:30:04,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:04,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107593521] [2022-04-06 19:30:04,480 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:04,480 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash 670604008, now seen corresponding path program 18 times [2022-04-06 19:30:04,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:04,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846019817] [2022-04-06 19:30:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:04,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:04,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:04,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 19:30:04,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:04,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846019817] [2022-04-06 19:30:04,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846019817] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:04,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071117543] [2022-04-06 19:30:04,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:04,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:04,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:04,544 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:04,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 19:30:04,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 19:30:04,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:30:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 19:30:04,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 19:30:04,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071117543] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:04,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:04,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-04-06 19:30:04,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:04,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107593521] [2022-04-06 19:30:04,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107593521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:04,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:04,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:30:04,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65026005] [2022-04-06 19:30:04,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:04,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:30:04,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:04,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:30:04,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:30:04,943 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:05,108 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2022-04-06 19:30:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:30:05,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-04-06 19:30:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:05,109 INFO L225 Difference]: With dead ends: 87 [2022-04-06 19:30:05,109 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 19:30:05,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:30:05,110 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:05,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 29 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:05,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 19:30:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2022-04-06 19:30:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2022-04-06 19:30:05,118 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 51 [2022-04-06 19:30:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:05,118 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2022-04-06 19:30:05,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2022-04-06 19:30:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 19:30:05,119 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:05,119 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:05,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:05,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 19:30:05,337 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:05,337 INFO L85 PathProgramCache]: Analyzing trace with hash -862659328, now seen corresponding path program 19 times [2022-04-06 19:30:05,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:05,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1038814274] [2022-04-06 19:30:05,338 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:05,338 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash -862659328, now seen corresponding path program 20 times [2022-04-06 19:30:05,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:05,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379212490] [2022-04-06 19:30:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:05,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:05,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:05,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 19:30:05,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379212490] [2022-04-06 19:30:05,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379212490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:05,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489809113] [2022-04-06 19:30:05,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:05,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:05,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:05,438 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:05,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 19:30:05,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:05,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:05,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:30:05,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-04-06 19:30:05,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-04-06 19:30:05,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489809113] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:05,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:05,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2022-04-06 19:30:05,645 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1038814274] [2022-04-06 19:30:05,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1038814274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:05,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:05,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:30:05,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258244652] [2022-04-06 19:30:05,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:05,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:30:05,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:30:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:30:05,646 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:05,920 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-04-06 19:30:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:30:05,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-04-06 19:30:05,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:05,921 INFO L225 Difference]: With dead ends: 90 [2022-04-06 19:30:05,921 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 19:30:05,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:30:05,921 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:05,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 31 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:05,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 19:30:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2022-04-06 19:30:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-04-06 19:30:05,930 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 55 [2022-04-06 19:30:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:05,930 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-04-06 19:30:05,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-04-06 19:30:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 19:30:05,931 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:05,931 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:05,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:06,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 19:30:06,141 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:06,141 INFO L85 PathProgramCache]: Analyzing trace with hash -804107836, now seen corresponding path program 21 times [2022-04-06 19:30:06,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:06,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [43758206] [2022-04-06 19:30:06,142 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:06,142 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash -804107836, now seen corresponding path program 22 times [2022-04-06 19:30:06,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:06,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431287195] [2022-04-06 19:30:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:06,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:06,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:06,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 19:30:06,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:06,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431287195] [2022-04-06 19:30:06,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431287195] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:06,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380687802] [2022-04-06 19:30:06,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:06,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:06,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:06,236 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:06,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 19:30:06,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:06,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:06,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:30:06,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 90 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 19:30:06,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 90 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 19:30:06,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380687802] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:06,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:06,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2022-04-06 19:30:06,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:06,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [43758206] [2022-04-06 19:30:06,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [43758206] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:06,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:06,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:30:06,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183930335] [2022-04-06 19:30:06,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:06,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:30:06,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:30:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:30:06,565 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:06,848 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2022-04-06 19:30:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:30:06,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-04-06 19:30:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:06,849 INFO L225 Difference]: With dead ends: 100 [2022-04-06 19:30:06,850 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 19:30:06,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:30:06,850 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 202 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:06,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 29 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 19:30:06,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-04-06 19:30:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 62 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-04-06 19:30:06,861 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 58 [2022-04-06 19:30:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:06,861 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-04-06 19:30:06,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-04-06 19:30:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 19:30:06,862 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:06,862 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:06,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:07,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:07,062 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:07,062 INFO L85 PathProgramCache]: Analyzing trace with hash -253331840, now seen corresponding path program 23 times [2022-04-06 19:30:07,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:07,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1171978623] [2022-04-06 19:30:07,063 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:07,063 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash -253331840, now seen corresponding path program 24 times [2022-04-06 19:30:07,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:07,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489311240] [2022-04-06 19:30:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:07,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 19:30:07,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:07,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489311240] [2022-04-06 19:30:07,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489311240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:07,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104683023] [2022-04-06 19:30:07,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:07,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:07,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:07,141 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:07,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 19:30:07,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:30:07,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:07,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:30:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-04-06 19:30:07,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-04-06 19:30:07,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104683023] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:07,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:07,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2022-04-06 19:30:07,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:07,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1171978623] [2022-04-06 19:30:07,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1171978623] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:07,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:07,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:30:07,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846647220] [2022-04-06 19:30:07,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:07,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:30:07,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:30:07,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:30:07,353 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:07,544 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-04-06 19:30:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:30:07,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-04-06 19:30:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:07,548 INFO L225 Difference]: With dead ends: 97 [2022-04-06 19:30:07,548 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 19:30:07,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:30:07,548 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 141 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:07,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 29 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 19:30:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-04-06 19:30:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 68 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-04-06 19:30:07,559 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 61 [2022-04-06 19:30:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:07,559 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-04-06 19:30:07,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-04-06 19:30:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 19:30:07,559 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:07,559 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:07,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:07,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 19:30:07,775 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:07,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1836788888, now seen corresponding path program 25 times [2022-04-06 19:30:07,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:07,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [711055722] [2022-04-06 19:30:07,776 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:07,776 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1836788888, now seen corresponding path program 26 times [2022-04-06 19:30:07,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:07,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825635297] [2022-04-06 19:30:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 19:30:07,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:07,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825635297] [2022-04-06 19:30:07,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825635297] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:07,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607060905] [2022-04-06 19:30:07,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:07,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:07,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:07,862 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:07,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 19:30:07,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:07,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:07,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:30:07,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 19:30:08,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 19:30:08,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607060905] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:08,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:08,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2022-04-06 19:30:08,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:08,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [711055722] [2022-04-06 19:30:08,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [711055722] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:08,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:08,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:30:08,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970130260] [2022-04-06 19:30:08,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:08,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:30:08,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:08,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:30:08,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:30:08,087 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:08,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:08,389 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2022-04-06 19:30:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:30:08,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-04-06 19:30:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:08,390 INFO L225 Difference]: With dead ends: 100 [2022-04-06 19:30:08,390 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 19:30:08,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:30:08,390 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 190 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:08,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 33 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 19:30:08,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2022-04-06 19:30:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 states have internal predecessors, (87), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2022-04-06 19:30:08,401 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 65 [2022-04-06 19:30:08,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:08,401 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2022-04-06 19:30:08,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2022-04-06 19:30:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:30:08,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:08,402 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:08,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:08,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 19:30:08,603 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:08,603 INFO L85 PathProgramCache]: Analyzing trace with hash -509955284, now seen corresponding path program 27 times [2022-04-06 19:30:08,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:08,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [727122148] [2022-04-06 19:30:08,604 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:08,604 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:08,604 INFO L85 PathProgramCache]: Analyzing trace with hash -509955284, now seen corresponding path program 28 times [2022-04-06 19:30:08,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:08,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953938666] [2022-04-06 19:30:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:08,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:08,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:08,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 19:30:08,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:08,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953938666] [2022-04-06 19:30:08,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953938666] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:08,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801217240] [2022-04-06 19:30:08,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:08,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:08,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:08,686 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:08,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 19:30:08,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:08,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:08,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:30:08,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 16 proven. 169 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 19:30:08,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 16 proven. 169 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 19:30:09,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801217240] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:09,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:09,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2022-04-06 19:30:09,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:09,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [727122148] [2022-04-06 19:30:09,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [727122148] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:09,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:09,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:30:09,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906328454] [2022-04-06 19:30:09,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:09,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:30:09,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:30:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:30:09,034 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:09,245 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-04-06 19:30:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:30:09,245 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-04-06 19:30:09,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:09,246 INFO L225 Difference]: With dead ends: 104 [2022-04-06 19:30:09,246 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 19:30:09,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:30:09,246 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:09,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 27 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 19:30:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-04-06 19:30:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 75 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2022-04-06 19:30:09,258 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 68 [2022-04-06 19:30:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:09,258 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2022-04-06 19:30:09,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2022-04-06 19:30:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 19:30:09,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:09,259 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:09,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:09,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:09,462 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:09,462 INFO L85 PathProgramCache]: Analyzing trace with hash 992555844, now seen corresponding path program 29 times [2022-04-06 19:30:09,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:09,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [630502871] [2022-04-06 19:30:09,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:09,477 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash 992555844, now seen corresponding path program 30 times [2022-04-06 19:30:09,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:09,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139304046] [2022-04-06 19:30:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:09,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:09,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:09,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 19:30:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 19:30:09,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:09,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139304046] [2022-04-06 19:30:09,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139304046] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:09,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026013210] [2022-04-06 19:30:09,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:09,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:09,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:09,547 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:09,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 19:30:09,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:30:09,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:09,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:30:09,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 19:30:09,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 19:30:09,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026013210] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:09,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:09,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2022-04-06 19:30:09,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [630502871] [2022-04-06 19:30:09,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [630502871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:09,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:09,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:30:09,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194062193] [2022-04-06 19:30:09,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:09,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:30:09,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:30:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:30:09,786 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:09,899 INFO L93 Difference]: Finished difference Result 158 states and 196 transitions. [2022-04-06 19:30:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:30:09,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-04-06 19:30:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:09,900 INFO L225 Difference]: With dead ends: 158 [2022-04-06 19:30:09,900 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 19:30:09,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:30:09,901 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:09,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 27 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 19:30:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-04-06 19:30:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 77 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-04-06 19:30:09,913 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 72 [2022-04-06 19:30:09,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:09,914 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-04-06 19:30:09,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-04-06 19:30:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 19:30:09,914 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:09,914 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:09,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:10,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:10,127 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1493400922, now seen corresponding path program 31 times [2022-04-06 19:30:10,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:10,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1769088613] [2022-04-06 19:30:10,128 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:10,128 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:10,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1493400922, now seen corresponding path program 32 times [2022-04-06 19:30:10,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:10,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957097013] [2022-04-06 19:30:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:10,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:10,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:10,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 19:30:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 19:30:10,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:10,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957097013] [2022-04-06 19:30:10,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957097013] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:10,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443321609] [2022-04-06 19:30:10,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:10,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:10,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:10,214 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:10,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 19:30:10,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:10,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:10,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:30:10,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 19:30:10,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 19:30:10,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443321609] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:10,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:10,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2022-04-06 19:30:10,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:10,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1769088613] [2022-04-06 19:30:10,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1769088613] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:10,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:10,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:30:10,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392121160] [2022-04-06 19:30:10,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:10,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:30:10,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:30:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:30:10,450 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:10,564 INFO L93 Difference]: Finished difference Result 160 states and 198 transitions. [2022-04-06 19:30:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:30:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-04-06 19:30:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:10,565 INFO L225 Difference]: With dead ends: 160 [2022-04-06 19:30:10,565 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 19:30:10,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:30:10,567 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:10,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 27 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 19:30:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-04-06 19:30:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-04-06 19:30:10,582 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 74 [2022-04-06 19:30:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:10,582 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-04-06 19:30:10,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:10,582 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-04-06 19:30:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 19:30:10,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:10,583 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:10,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:10,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:10,797 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:10,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1798930824, now seen corresponding path program 33 times [2022-04-06 19:30:10,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:10,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [573524720] [2022-04-06 19:30:10,798 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:10,798 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:10,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1798930824, now seen corresponding path program 34 times [2022-04-06 19:30:10,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:10,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077618818] [2022-04-06 19:30:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:10,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:10,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:10,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 19:30:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 19:30:10,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077618818] [2022-04-06 19:30:10,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077618818] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592149818] [2022-04-06 19:30:10,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:10,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:10,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:10,881 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:10,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 19:30:10,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:10,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:10,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 19:30:10,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:11,344 INFO L356 Elim1Store]: treesize reduction 274, result has 11.6 percent of original size [2022-04-06 19:30:11,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 76 treesize of output 57 [2022-04-06 19:30:11,497 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-04-06 19:30:11,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 13 [2022-04-06 19:30:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 90 proven. 123 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 19:30:11,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:12,101 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 102 treesize of output 88 [2022-04-06 19:30:12,187 INFO L356 Elim1Store]: treesize reduction 117, result has 54.3 percent of original size [2022-04-06 19:30:12,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1050 treesize of output 1045 [2022-04-06 19:30:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 165 proven. 26 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 19:30:13,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592149818] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:13,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:13,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 21, 16] total 42 [2022-04-06 19:30:13,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:13,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [573524720] [2022-04-06 19:30:13,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [573524720] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:13,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:13,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:30:13,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168435333] [2022-04-06 19:30:13,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:13,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:30:13,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:13,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:30:13,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1580, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:30:13,219 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:13,488 INFO L93 Difference]: Finished difference Result 177 states and 219 transitions. [2022-04-06 19:30:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:30:13,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-04-06 19:30:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:13,490 INFO L225 Difference]: With dead ends: 177 [2022-04-06 19:30:13,490 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 19:30:13,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:30:13,491 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 60 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:13,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 33 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:13,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 19:30:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2022-04-06 19:30:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 81 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2022-04-06 19:30:13,505 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 76 [2022-04-06 19:30:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:13,505 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2022-04-06 19:30:13,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2022-04-06 19:30:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 19:30:13,505 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:13,505 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:13,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:13,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 19:30:13,722 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:13,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:13,722 INFO L85 PathProgramCache]: Analyzing trace with hash 338841578, now seen corresponding path program 35 times [2022-04-06 19:30:13,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:13,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033262964] [2022-04-06 19:30:13,723 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:13,723 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash 338841578, now seen corresponding path program 36 times [2022-04-06 19:30:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:13,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284815978] [2022-04-06 19:30:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:13,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:13,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:30:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 19:30:13,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:13,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284815978] [2022-04-06 19:30:13,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284815978] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:13,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017446240] [2022-04-06 19:30:13,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:13,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:13,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:14,004 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:14,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 19:30:14,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:30:14,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:14,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 19:30:14,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:14,182 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:30:14,183 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 11 treesize of output 11 [2022-04-06 19:30:14,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:30:14,639 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 18 treesize of output 20 [2022-04-06 19:30:14,701 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 19:30:14,701 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 23 treesize of output 10 [2022-04-06 19:30:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 9 proven. 107 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 19:30:14,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:14,827 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_804 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_804) |c_main_~#array~1.base|) |c_main_~#array~1.offset|) 0)) is different from false [2022-04-06 19:30:14,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017446240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:14,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:30:14,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-04-06 19:30:14,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:14,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033262964] [2022-04-06 19:30:14,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033262964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:14,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:14,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:30:14,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450286507] [2022-04-06 19:30:14,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:14,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:30:14,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:14,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:30:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=826, Unknown=7, NotChecked=58, Total=992 [2022-04-06 19:30:14,830 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:15,469 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2022-04-06 19:30:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:30:15,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-04-06 19:30:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:15,470 INFO L225 Difference]: With dead ends: 112 [2022-04-06 19:30:15,470 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 19:30:15,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=403, Invalid=2240, Unknown=13, NotChecked=100, Total=2756 [2022-04-06 19:30:15,471 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:15,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 31 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:30:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 19:30:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2022-04-06 19:30:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 86 states have internal predecessors, (105), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:30:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2022-04-06 19:30:15,487 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 78 [2022-04-06 19:30:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:15,487 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2022-04-06 19:30:15,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2022-04-06 19:30:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 19:30:15,487 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:15,487 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 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] [2022-04-06 19:30:15,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:15,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 19:30:15,703 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1489934626, now seen corresponding path program 1 times [2022-04-06 19:30:15,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:15,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [641522414] [2022-04-06 19:30:15,705 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:15,705 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:15,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1489934626, now seen corresponding path program 2 times [2022-04-06 19:30:15,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:15,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955284763] [2022-04-06 19:30:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:15,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:16,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:16,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:30:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:16,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:30:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 134 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 19:30:16,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955284763] [2022-04-06 19:30:16,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955284763] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703447685] [2022-04-06 19:30:16,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:16,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:16,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:16,142 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:16,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 19:30:16,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:16,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:16,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:30:16,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:16,281 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:30:16,281 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 11 treesize of output 11 [2022-04-06 19:30:16,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:30:16,432 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:30:16,432 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:30:16,782 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 16 treesize of output 18 [2022-04-06 19:30:16,999 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 19:30:16,999 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 21 treesize of output 10 [2022-04-06 19:30:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 19:30:17,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:17,185 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_889 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_889) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 4)) 1)) is different from false [2022-04-06 19:30:17,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703447685] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:17,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:30:17,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2022-04-06 19:30:17,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:17,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [641522414] [2022-04-06 19:30:17,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [641522414] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:17,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:17,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:30:17,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337676740] [2022-04-06 19:30:17,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:17,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:30:17,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:17,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:30:17,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1348, Unknown=11, NotChecked=74, Total=1560 [2022-04-06 19:30:17,187 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 16 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:18,166 INFO L93 Difference]: Finished difference Result 126 states and 150 transitions. [2022-04-06 19:30:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:30:18,166 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 16 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 86 [2022-04-06 19:30:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:18,167 INFO L225 Difference]: With dead ends: 126 [2022-04-06 19:30:18,167 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 19:30:18,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=3031, Unknown=17, NotChecked=114, Total=3540 [2022-04-06 19:30:18,168 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:18,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 41 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:30:18,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 19:30:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 103. [2022-04-06 19:30:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 92 states have internal predecessors, (111), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:30:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2022-04-06 19:30:18,186 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 86 [2022-04-06 19:30:18,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:18,187 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2022-04-06 19:30:18,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 16 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2022-04-06 19:30:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 19:30:18,187 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:18,187 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:18,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:18,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:18,392 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash -34321966, now seen corresponding path program 3 times [2022-04-06 19:30:18,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:18,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1545169095] [2022-04-06 19:30:18,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:18,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:18,393 INFO L85 PathProgramCache]: Analyzing trace with hash -34321966, now seen corresponding path program 4 times [2022-04-06 19:30:18,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:18,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264499793] [2022-04-06 19:30:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:18,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:18,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:18,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:30:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:18,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:30:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:18,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:30:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 125 proven. 61 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 19:30:18,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:18,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264499793] [2022-04-06 19:30:18,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264499793] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:18,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75627562] [2022-04-06 19:30:18,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:18,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:18,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:18,992 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:18,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 19:30:19,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:19,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 19:30:19,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:19,611 INFO L356 Elim1Store]: treesize reduction 274, result has 11.6 percent of original size [2022-04-06 19:30:19,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 76 treesize of output 57 [2022-04-06 19:30:19,844 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-04-06 19:30:19,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 13 [2022-04-06 19:30:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 90 proven. 123 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 19:30:19,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:20,705 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 102 treesize of output 88 [2022-04-06 19:30:20,784 INFO L356 Elim1Store]: treesize reduction 117, result has 54.3 percent of original size [2022-04-06 19:30:20,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2086 treesize of output 1969 [2022-04-06 19:30:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 169 proven. 26 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 19:30:21,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75627562] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:21,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:21,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 16] total 59 [2022-04-06 19:30:21,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:21,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1545169095] [2022-04-06 19:30:21,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1545169095] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:21,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:21,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 19:30:21,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770378506] [2022-04-06 19:30:21,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:21,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 19:30:21,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 19:30:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3144, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 19:30:21,555 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:26,245 INFO L93 Difference]: Finished difference Result 410 states and 529 transitions. [2022-04-06 19:30:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 19:30:26,245 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 94 [2022-04-06 19:30:26,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:26,247 INFO L225 Difference]: With dead ends: 410 [2022-04-06 19:30:26,247 INFO L226 Difference]: Without dead ends: 350 [2022-04-06 19:30:26,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3940 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1711, Invalid=13541, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 19:30:26,250 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 250 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:26,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 31 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:30:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-04-06 19:30:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 233. [2022-04-06 19:30:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 221 states have (on average 1.3665158371040724) internal successors, (302), 222 states have internal predecessors, (302), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:30:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 313 transitions. [2022-04-06 19:30:26,333 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 313 transitions. Word has length 94 [2022-04-06 19:30:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:26,333 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 313 transitions. [2022-04-06 19:30:26,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 24 states have internal predecessors, (51), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 313 transitions. [2022-04-06 19:30:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 19:30:26,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:26,334 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:26,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:26,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:26,539 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:26,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2062908076, now seen corresponding path program 1 times [2022-04-06 19:30:26,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:26,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2003182867] [2022-04-06 19:30:26,540 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:26,540 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:26,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2062908076, now seen corresponding path program 2 times [2022-04-06 19:30:26,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:26,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234250342] [2022-04-06 19:30:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:26,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:26,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:26,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:30:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:27,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:30:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:27,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:30:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 86 proven. 136 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 19:30:27,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:27,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234250342] [2022-04-06 19:30:27,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234250342] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:27,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680485472] [2022-04-06 19:30:27,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:27,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:27,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:27,547 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:27,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 19:30:27,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:27,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:27,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 19:30:27,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:27,700 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:30:27,701 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 11 treesize of output 11 [2022-04-06 19:30:27,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:30:27,878 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:30:27,878 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:30:27,925 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:30:27,926 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:30:28,328 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 16 treesize of output 18 [2022-04-06 19:30:28,704 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 19:30:28,704 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 21 treesize of output 10 [2022-04-06 19:30:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-04-06 19:30:28,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:29,017 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1051 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_1051) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 8)))) is different from false [2022-04-06 19:30:29,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680485472] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:29,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:30:29,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 20] total 52 [2022-04-06 19:30:29,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:29,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2003182867] [2022-04-06 19:30:29,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2003182867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:29,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:29,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 19:30:29,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464204065] [2022-04-06 19:30:29,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:29,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 19:30:29,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:29,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 19:30:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2957, Unknown=10, NotChecked=110, Total=3306 [2022-04-06 19:30:29,020 INFO L87 Difference]: Start difference. First operand 233 states and 313 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:35,794 INFO L93 Difference]: Finished difference Result 762 states and 1052 transitions. [2022-04-06 19:30:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 19:30:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 94 [2022-04-06 19:30:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:35,797 INFO L225 Difference]: With dead ends: 762 [2022-04-06 19:30:35,797 INFO L226 Difference]: Without dead ends: 701 [2022-04-06 19:30:35,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 93 SyntacticMatches, 8 SemanticMatches, 145 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2620, Invalid=18543, Unknown=11, NotChecked=288, Total=21462 [2022-04-06 19:30:35,800 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 429 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:35,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 38 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:30:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-04-06 19:30:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 465. [2022-04-06 19:30:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 453 states have (on average 1.3929359823399559) internal successors, (631), 454 states have internal predecessors, (631), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:30:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 642 transitions. [2022-04-06 19:30:35,994 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 642 transitions. Word has length 94 [2022-04-06 19:30:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:35,994 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 642 transitions. [2022-04-06 19:30:35,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 642 transitions. [2022-04-06 19:30:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 19:30:35,995 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:35,995 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:36,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:36,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 19:30:36,211 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:36,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1639261354, now seen corresponding path program 3 times [2022-04-06 19:30:36,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:36,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165961163] [2022-04-06 19:30:36,212 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:36,212 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1639261354, now seen corresponding path program 4 times [2022-04-06 19:30:36,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:36,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75422337] [2022-04-06 19:30:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:36,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:36,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:36,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:30:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:36,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:30:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:30:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 19:30:36,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:36,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75422337] [2022-04-06 19:30:36,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75422337] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:36,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626750965] [2022-04-06 19:30:36,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:36,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:36,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:36,677 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:36,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 19:30:36,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:36,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:36,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 19:30:36,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:37,079 INFO L356 Elim1Store]: treesize reduction 147, result has 14.0 percent of original size [2022-04-06 19:30:37,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 42 [2022-04-06 19:30:37,159 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-06 19:30:37,160 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 34 treesize of output 10 [2022-04-06 19:30:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 108 proven. 92 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-04-06 19:30:37,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:41,710 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 82 treesize of output 72 [2022-04-06 19:30:41,764 INFO L356 Elim1Store]: treesize reduction 81, result has 52.1 percent of original size [2022-04-06 19:30:41,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2070 treesize of output 1915 [2022-04-06 19:30:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 170 proven. 16 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 19:30:42,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626750965] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:42,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:42,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 11] total 43 [2022-04-06 19:30:42,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:42,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165961163] [2022-04-06 19:30:42,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165961163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:42,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:42,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:30:42,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051515020] [2022-04-06 19:30:42,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:42,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:30:42,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:42,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:30:42,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1684, Unknown=2, NotChecked=0, Total=1806 [2022-04-06 19:30:42,208 INFO L87 Difference]: Start difference. First operand 465 states and 642 transitions. Second operand has 21 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:30:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:43,496 INFO L93 Difference]: Finished difference Result 490 states and 670 transitions. [2022-04-06 19:30:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:30:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 94 [2022-04-06 19:30:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:43,498 INFO L225 Difference]: With dead ends: 490 [2022-04-06 19:30:43,498 INFO L226 Difference]: Without dead ends: 488 [2022-04-06 19:30:43,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=308, Invalid=3596, Unknown=2, NotChecked=0, Total=3906 [2022-04-06 19:30:43,498 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 136 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:43,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 46 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:30:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-04-06 19:30:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 473. [2022-04-06 19:30:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 459 states have (on average 1.3877995642701526) internal successors, (637), 460 states have internal predecessors, (637), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 19:30:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 650 transitions. [2022-04-06 19:30:43,704 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 650 transitions. Word has length 94 [2022-04-06 19:30:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:43,704 INFO L478 AbstractCegarLoop]: Abstraction has 473 states and 650 transitions. [2022-04-06 19:30:43,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:30:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 650 transitions. [2022-04-06 19:30:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:30:43,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:43,706 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:43,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:43,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 19:30:43,919 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:43,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1315817034, now seen corresponding path program 5 times [2022-04-06 19:30:43,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:43,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [256708668] [2022-04-06 19:30:43,920 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:43,920 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1315817034, now seen corresponding path program 6 times [2022-04-06 19:30:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:43,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143316880] [2022-04-06 19:30:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:43,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:43,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:30:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:44,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:30:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:44,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:30:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:44,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:30:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 19:30:44,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:44,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143316880] [2022-04-06 19:30:44,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143316880] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:44,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606941079] [2022-04-06 19:30:44,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:44,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:44,347 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:44,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 19:30:44,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 19:30:44,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 19:30:44,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:44,715 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:30:44,715 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 11 treesize of output 11 [2022-04-06 19:30:44,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:30:44,833 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:30:44,833 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:30:44,874 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 19:30:44,874 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 1 case distinctions, treesize of input 25 treesize of output 30 [2022-04-06 19:30:44,955 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 19:30:44,956 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 1 case distinctions, treesize of input 29 treesize of output 34 [2022-04-06 19:30:45,379 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 16 treesize of output 18 [2022-04-06 19:30:45,830 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 19:30:45,830 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 21 treesize of output 10 [2022-04-06 19:30:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 19:30:45,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:46,168 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_1215) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 12)) 3)) is different from false [2022-04-06 19:30:46,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606941079] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:46,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:30:46,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-04-06 19:30:46,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:46,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [256708668] [2022-04-06 19:30:46,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [256708668] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:46,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:46,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:30:46,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517790155] [2022-04-06 19:30:46,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:46,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:30:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:30:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2090, Unknown=11, NotChecked=92, Total=2352 [2022-04-06 19:30:46,171 INFO L87 Difference]: Start difference. First operand 473 states and 650 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 20 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:49,071 INFO L93 Difference]: Finished difference Result 1370 states and 1890 transitions. [2022-04-06 19:30:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 19:30:49,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 20 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 102 [2022-04-06 19:30:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:49,075 INFO L225 Difference]: With dead ends: 1370 [2022-04-06 19:30:49,075 INFO L226 Difference]: Without dead ends: 1021 [2022-04-06 19:30:49,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 122 SyntacticMatches, 11 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=725, Invalid=8968, Unknown=13, NotChecked=194, Total=9900 [2022-04-06 19:30:49,076 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 280 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:49,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 49 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:30:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-04-06 19:30:49,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 610. [2022-04-06 19:30:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 596 states have (on average 1.3708053691275168) internal successors, (817), 597 states have internal predecessors, (817), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 19:30:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 830 transitions. [2022-04-06 19:30:49,349 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 830 transitions. Word has length 102 [2022-04-06 19:30:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:49,349 INFO L478 AbstractCegarLoop]: Abstraction has 610 states and 830 transitions. [2022-04-06 19:30:49,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 20 states have internal predecessors, (58), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 830 transitions. [2022-04-06 19:30:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:30:49,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:49,351 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:49,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 19:30:49,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 19:30:49,555 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1425291514, now seen corresponding path program 7 times [2022-04-06 19:30:49,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1762468752] [2022-04-06 19:30:49,556 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:49,556 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1425291514, now seen corresponding path program 8 times [2022-04-06 19:30:49,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:49,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854372352] [2022-04-06 19:30:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:49,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:50,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:50,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:30:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:50,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:30:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:50,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:30:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:50,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:30:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 19:30:50,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:50,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854372352] [2022-04-06 19:30:50,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854372352] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:50,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832182123] [2022-04-06 19:30:50,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:50,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:50,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:50,084 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:50,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 19:30:50,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:50,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:50,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 19:30:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:50,241 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:30:50,241 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 11 treesize of output 11 [2022-04-06 19:30:50,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:30:50,348 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:30:50,348 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:30:50,390 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:30:50,391 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:30:50,436 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:30:50,436 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:30:50,781 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 16 treesize of output 18 [2022-04-06 19:30:51,193 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 19:30:51,193 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 21 treesize of output 10 [2022-04-06 19:30:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 4 proven. 152 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 19:30:51,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:51,442 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1304 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_1304) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 12)) 3)) is different from false [2022-04-06 19:30:51,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832182123] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:51,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:30:51,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2022-04-06 19:30:51,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:51,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1762468752] [2022-04-06 19:30:51,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1762468752] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:51,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:51,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:30:51,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030203481] [2022-04-06 19:30:51,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:51,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:30:51,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:51,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:30:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1802, Unknown=11, NotChecked=86, Total=2070 [2022-04-06 19:30:51,444 INFO L87 Difference]: Start difference. First operand 610 states and 830 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:30:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:52,717 INFO L93 Difference]: Finished difference Result 631 states and 853 transitions. [2022-04-06 19:30:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:30:52,718 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 102 [2022-04-06 19:30:52,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:52,719 INFO L225 Difference]: With dead ends: 631 [2022-04-06 19:30:52,720 INFO L226 Difference]: Without dead ends: 629 [2022-04-06 19:30:52,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 113 SyntacticMatches, 12 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=435, Invalid=3584, Unknown=17, NotChecked=124, Total=4160 [2022-04-06 19:30:52,720 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 136 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:52,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 42 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:30:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-04-06 19:30:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 618. [2022-04-06 19:30:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 602 states have (on average 1.367109634551495) internal successors, (823), 603 states have internal predecessors, (823), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:30:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 838 transitions. [2022-04-06 19:30:52,990 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 838 transitions. Word has length 102 [2022-04-06 19:30:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:52,991 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 838 transitions. [2022-04-06 19:30:52,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:30:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 838 transitions. [2022-04-06 19:30:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:30:52,992 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:52,992 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:53,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:53,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 19:30:53,207 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:53,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1545601530, now seen corresponding path program 9 times [2022-04-06 19:30:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:53,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1433305732] [2022-04-06 19:30:53,208 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:53,208 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:53,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1545601530, now seen corresponding path program 10 times [2022-04-06 19:30:53,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:53,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156880775] [2022-04-06 19:30:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:53,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:53,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:53,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:30:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:53,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:30:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:53,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:30:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:53,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:30:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:53,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:30:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 126 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 19:30:53,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:53,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156880775] [2022-04-06 19:30:53,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156880775] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:53,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440306451] [2022-04-06 19:30:53,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:53,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:53,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:53,559 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:53,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 19:30:53,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:53,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:53,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 19:30:53,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:53,946 INFO L356 Elim1Store]: treesize reduction 147, result has 14.0 percent of original size [2022-04-06 19:30:53,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 42 [2022-04-06 19:30:54,125 INFO L356 Elim1Store]: treesize reduction 147, result has 14.0 percent of original size [2022-04-06 19:30:54,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 42 [2022-04-06 19:30:54,350 INFO L356 Elim1Store]: treesize reduction 273, result has 8.1 percent of original size [2022-04-06 19:30:54,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 45 [2022-04-06 19:30:54,431 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-06 19:30:54,432 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 36 treesize of output 12 [2022-04-06 19:30:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 55 proven. 169 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 19:30:54,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:55,994 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 133 treesize of output 119 [2022-04-06 19:30:56,066 INFO L356 Elim1Store]: treesize reduction 140, result has 45.3 percent of original size [2022-04-06 19:30:56,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3143 treesize of output 2904 [2022-04-06 19:30:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 74 proven. 158 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-04-06 19:30:57,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440306451] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:57,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:57,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 24] total 60 [2022-04-06 19:30:57,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:57,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1433305732] [2022-04-06 19:30:57,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1433305732] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:57,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:57,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:30:57,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846572208] [2022-04-06 19:30:57,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:57,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:30:57,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:57,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:30:57,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3300, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:30:57,598 INFO L87 Difference]: Start difference. First operand 618 states and 838 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:58,456 INFO L93 Difference]: Finished difference Result 1142 states and 1560 transitions. [2022-04-06 19:30:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:30:58,456 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 110 [2022-04-06 19:30:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:58,458 INFO L225 Difference]: With dead ends: 1142 [2022-04-06 19:30:58,458 INFO L226 Difference]: Without dead ends: 563 [2022-04-06 19:30:58,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=380, Invalid=4450, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 19:30:58,459 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:58,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 23 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:58,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-04-06 19:30:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-04-06 19:30:58,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 547 states have (on average 1.3747714808043876) internal successors, (752), 548 states have internal predecessors, (752), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:30:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 767 transitions. [2022-04-06 19:30:58,707 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 767 transitions. Word has length 110 [2022-04-06 19:30:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:58,707 INFO L478 AbstractCegarLoop]: Abstraction has 563 states and 767 transitions. [2022-04-06 19:30:58,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 767 transitions. [2022-04-06 19:30:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:30:58,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:58,709 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:58,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:58,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:58,925 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:58,926 INFO L85 PathProgramCache]: Analyzing trace with hash 120276278, now seen corresponding path program 11 times [2022-04-06 19:30:58,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:58,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423230220] [2022-04-06 19:30:58,927 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:58,927 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash 120276278, now seen corresponding path program 12 times [2022-04-06 19:30:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:58,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666355993] [2022-04-06 19:30:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:59,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:59,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:30:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:59,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:30:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:59,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:30:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:59,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:30:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:59,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:30:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 129 proven. 61 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-04-06 19:30:59,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666355993] [2022-04-06 19:30:59,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666355993] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066332569] [2022-04-06 19:30:59,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:59,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:59,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:59,629 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:30:59,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 19:30:59,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:30:59,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:59,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:30:59,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:00,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:00,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:00,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:00,539 INFO L356 Elim1Store]: treesize reduction 99, result has 22.0 percent of original size [2022-04-06 19:31:00,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 71 [2022-04-06 19:31:00,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:31:00,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:00,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:00,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:31:00,911 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:31:00,911 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 41 treesize of output 18 [2022-04-06 19:31:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 118 proven. 71 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 19:31:01,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:01,295 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 78 treesize of output 64 [2022-04-06 19:31:01,337 INFO L356 Elim1Store]: treesize reduction 78, result has 41.4 percent of original size [2022-04-06 19:31:01,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 738 treesize of output 705 [2022-04-06 19:31:04,094 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 101 treesize of output 87 [2022-04-06 19:31:04,195 INFO L356 Elim1Store]: treesize reduction 109, result has 56.6 percent of original size [2022-04-06 19:31:04,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1049 treesize of output 1048 [2022-04-06 19:31:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 113 proven. 92 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-06 19:31:18,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066332569] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:18,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:18,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 25] total 69 [2022-04-06 19:31:18,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:18,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423230220] [2022-04-06 19:31:18,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423230220] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:18,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:18,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 19:31:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954863956] [2022-04-06 19:31:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:18,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 19:31:18,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 19:31:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=4284, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 19:31:18,089 INFO L87 Difference]: Start difference. First operand 563 states and 767 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 24 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:23,782 INFO L93 Difference]: Finished difference Result 1276 states and 1722 transitions. [2022-04-06 19:31:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 19:31:23,782 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 24 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 110 [2022-04-06 19:31:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:23,785 INFO L225 Difference]: With dead ends: 1276 [2022-04-06 19:31:23,785 INFO L226 Difference]: Without dead ends: 954 [2022-04-06 19:31:23,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5575 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1857, Invalid=17049, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 19:31:23,787 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 183 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:23,787 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 36 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:31:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-04-06 19:31:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 611. [2022-04-06 19:31:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 595 states have (on average 1.3714285714285714) internal successors, (816), 596 states have internal predecessors, (816), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:31:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 831 transitions. [2022-04-06 19:31:24,084 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 831 transitions. Word has length 110 [2022-04-06 19:31:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:24,084 INFO L478 AbstractCegarLoop]: Abstraction has 611 states and 831 transitions. [2022-04-06 19:31:24,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 24 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 831 transitions. [2022-04-06 19:31:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:31:24,085 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:24,085 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:24,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 19:31:24,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:24,299 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:24,300 INFO L85 PathProgramCache]: Analyzing trace with hash -412973256, now seen corresponding path program 13 times [2022-04-06 19:31:24,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:24,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1440268092] [2022-04-06 19:31:24,300 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:24,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash -412973256, now seen corresponding path program 14 times [2022-04-06 19:31:24,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91404746] [2022-04-06 19:31:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:24,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:31:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:31:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:31:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:31:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 134 proven. 53 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 19:31:24,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:24,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91404746] [2022-04-06 19:31:24,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91404746] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:24,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454536956] [2022-04-06 19:31:24,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:31:24,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:24,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:24,753 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:31:24,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 19:31:24,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:31:24,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:24,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 19:31:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:24,915 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:31:24,915 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 11 treesize of output 11 [2022-04-06 19:31:24,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:31:24,996 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:31:24,996 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:31:25,035 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:31:25,035 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:31:25,080 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:31:25,080 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:31:25,127 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:31:25,127 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:31:25,462 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 16 treesize of output 18 [2022-04-06 19:31:25,984 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 19:31:25,984 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 21 treesize of output 10 [2022-04-06 19:31:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 9 proven. 163 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 19:31:26,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:26,305 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1561 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_1561) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 16)) 4)) is different from false [2022-04-06 19:31:26,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454536956] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:26,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:31:26,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-04-06 19:31:26,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:26,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1440268092] [2022-04-06 19:31:26,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1440268092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:26,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:26,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:31:26,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411707421] [2022-04-06 19:31:26,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:26,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:31:26,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:26,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:31:26,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2149, Unknown=10, NotChecked=94, Total=2450 [2022-04-06 19:31:26,307 INFO L87 Difference]: Start difference. First operand 611 states and 831 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 20 states have internal predecessors, (51), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:29,459 INFO L93 Difference]: Finished difference Result 1355 states and 1832 transitions. [2022-04-06 19:31:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 19:31:29,460 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 20 states have internal predecessors, (51), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 110 [2022-04-06 19:31:29,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:29,462 INFO L225 Difference]: With dead ends: 1355 [2022-04-06 19:31:29,462 INFO L226 Difference]: Without dead ends: 973 [2022-04-06 19:31:29,463 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 122 SyntacticMatches, 12 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1312, Invalid=9188, Unknown=10, NotChecked=202, Total=10712 [2022-04-06 19:31:29,464 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 305 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:29,464 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 29 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:31:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-04-06 19:31:29,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 824. [2022-04-06 19:31:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 808 states have (on average 1.3712871287128714) internal successors, (1108), 809 states have internal predecessors, (1108), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:31:29,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1123 transitions. [2022-04-06 19:31:29,949 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1123 transitions. Word has length 110 [2022-04-06 19:31:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:29,949 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 1123 transitions. [2022-04-06 19:31:29,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 20 states have internal predecessors, (51), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:29,949 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1123 transitions. [2022-04-06 19:31:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:31:29,952 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:29,952 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:29,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 19:31:30,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 19:31:30,167 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:30,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1264922498, now seen corresponding path program 15 times [2022-04-06 19:31:30,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:30,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205319953] [2022-04-06 19:31:30,168 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:30,168 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:30,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1264922498, now seen corresponding path program 16 times [2022-04-06 19:31:30,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:30,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404406917] [2022-04-06 19:31:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:30,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:31:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:31:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:31:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:31:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 153 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-04-06 19:31:30,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404406917] [2022-04-06 19:31:30,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404406917] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334829744] [2022-04-06 19:31:30,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:31:30,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:30,997 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:31:30,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 19:31:31,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:31:31,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:31,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:31:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:31,197 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:31:31,197 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 11 treesize of output 11 [2022-04-06 19:31:31,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:31:31,276 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 19:31:31,276 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 1 case distinctions, treesize of input 30 treesize of output 29 [2022-04-06 19:31:31,316 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 19:31:31,316 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 1 case distinctions, treesize of input 30 treesize of output 29 [2022-04-06 19:31:31,355 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 19:31:31,355 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 1 case distinctions, treesize of input 30 treesize of output 29 [2022-04-06 19:31:31,401 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 19:31:31,402 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 1 case distinctions, treesize of input 30 treesize of output 29 [2022-04-06 19:31:31,910 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 21 treesize of output 23 [2022-04-06 19:31:35,011 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-04-06 19:31:35,011 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 12 [2022-04-06 19:31:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 5 proven. 167 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 19:31:35,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:35,382 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1652 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_1652) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 16)) 4)) is different from false [2022-04-06 19:31:35,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334829744] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:35,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:31:35,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2022-04-06 19:31:35,383 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:35,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205319953] [2022-04-06 19:31:35,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205319953] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:35,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:35,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:31:35,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941323630] [2022-04-06 19:31:35,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:35,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:31:35,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:31:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2475, Unknown=13, NotChecked=100, Total=2756 [2022-04-06 19:31:35,385 INFO L87 Difference]: Start difference. First operand 824 states and 1123 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:37,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:37,105 INFO L93 Difference]: Finished difference Result 1560 states and 2143 transitions. [2022-04-06 19:31:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:31:37,106 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 110 [2022-04-06 19:31:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:37,108 INFO L225 Difference]: With dead ends: 1560 [2022-04-06 19:31:37,108 INFO L226 Difference]: Without dead ends: 803 [2022-04-06 19:31:37,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 123 SyntacticMatches, 13 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=383, Invalid=4547, Unknown=44, NotChecked=138, Total=5112 [2022-04-06 19:31:37,109 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:37,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 22 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:31:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-04-06 19:31:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 799. [2022-04-06 19:31:37,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 783 states have (on average 1.3767560664112388) internal successors, (1078), 784 states have internal predecessors, (1078), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:31:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1093 transitions. [2022-04-06 19:31:37,581 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1093 transitions. Word has length 110 [2022-04-06 19:31:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:37,581 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1093 transitions. [2022-04-06 19:31:37,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1093 transitions. [2022-04-06 19:31:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:31:37,583 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:37,583 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:37,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 19:31:37,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:37,790 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:37,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1022226188, now seen corresponding path program 17 times [2022-04-06 19:31:37,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:37,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [8908367] [2022-04-06 19:31:37,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:37,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:37,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1022226188, now seen corresponding path program 18 times [2022-04-06 19:31:37,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:37,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274075060] [2022-04-06 19:31:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:37,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:37,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:37,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:38,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:31:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:38,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:31:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:38,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:31:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:38,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:31:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 130 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 19:31:38,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274075060] [2022-04-06 19:31:38,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274075060] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:38,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767124072] [2022-04-06 19:31:38,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:31:38,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:38,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:38,216 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:31:38,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 19:31:38,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 19:31:38,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 19:31:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:38,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:38,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:38,899 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:31:38,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2022-04-06 19:31:39,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:39,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:31:39,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:39,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:31:39,247 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:31:39,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 16 [2022-04-06 19:31:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 131 proven. 39 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 19:31:39,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:39,550 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 91 treesize of output 77 [2022-04-06 19:31:39,560 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-04-06 19:31:39,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 713 treesize of output 641 [2022-04-06 19:31:51,878 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 129 treesize of output 115 [2022-04-06 19:31:51,953 INFO L356 Elim1Store]: treesize reduction 140, result has 45.3 percent of original size [2022-04-06 19:31:51,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1509 treesize of output 1438 [2022-04-06 19:31:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 134 proven. 39 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-04-06 19:31:55,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767124072] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:55,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:55,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 57 [2022-04-06 19:31:55,770 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:55,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [8908367] [2022-04-06 19:31:55,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [8908367] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:55,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:55,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:31:55,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003601263] [2022-04-06 19:31:55,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:55,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:31:55,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:55,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:31:55,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2847, Unknown=12, NotChecked=0, Total=3192 [2022-04-06 19:31:55,771 INFO L87 Difference]: Start difference. First operand 799 states and 1093 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:58,461 INFO L93 Difference]: Finished difference Result 1903 states and 2629 transitions. [2022-04-06 19:31:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 19:31:58,462 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 110 [2022-04-06 19:31:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:58,464 INFO L225 Difference]: With dead ends: 1903 [2022-04-06 19:31:58,464 INFO L226 Difference]: Without dead ends: 1228 [2022-04-06 19:31:58,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=720, Invalid=7100, Unknown=12, NotChecked=0, Total=7832 [2022-04-06 19:31:58,466 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:58,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 46 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:31:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-04-06 19:31:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 927. [2022-04-06 19:31:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 911 states have (on average 1.3677277716794731) internal successors, (1246), 912 states have internal predecessors, (1246), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:31:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1261 transitions. [2022-04-06 19:31:59,027 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1261 transitions. Word has length 110 [2022-04-06 19:31:59,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:59,028 INFO L478 AbstractCegarLoop]: Abstraction has 927 states and 1261 transitions. [2022-04-06 19:31:59,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:59,028 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1261 transitions. [2022-04-06 19:31:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:31:59,029 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:59,029 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:59,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 19:31:59,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:59,243 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:59,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:59,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1666738186, now seen corresponding path program 19 times [2022-04-06 19:31:59,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:59,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480322063] [2022-04-06 19:31:59,244 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:31:59,244 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1666738186, now seen corresponding path program 20 times [2022-04-06 19:31:59,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:59,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398316829] [2022-04-06 19:31:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:59,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:59,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:59,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:59,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:31:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:59,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:31:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:59,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:31:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:59,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:31:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 128 proven. 29 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 19:31:59,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:59,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398316829] [2022-04-06 19:31:59,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398316829] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:59,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912858848] [2022-04-06 19:31:59,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:31:59,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:59,509 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:31:59,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 19:31:59,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:31:59,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:59,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 19:31:59,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:59,675 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:31:59,675 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 11 treesize of output 11 [2022-04-06 19:31:59,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:31:59,755 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:31:59,756 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:31:59,793 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:31:59,794 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:31:59,836 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:31:59,836 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:31:59,881 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:31:59,881 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:32:00,239 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 16 treesize of output 18 [2022-04-06 19:32:00,753 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 19:32:00,753 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 21 treesize of output 10 [2022-04-06 19:32:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 9 proven. 163 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 19:32:00,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:01,075 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1823 (Array Int Int))) (= 4 (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_1823) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 16)))) is different from false [2022-04-06 19:32:01,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912858848] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:01,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:32:01,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 36 [2022-04-06 19:32:01,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:01,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480322063] [2022-04-06 19:32:01,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480322063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:01,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:01,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:32:01,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861107244] [2022-04-06 19:32:01,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:01,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:32:01,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:32:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1654, Unknown=10, NotChecked=82, Total=1892 [2022-04-06 19:32:01,077 INFO L87 Difference]: Start difference. First operand 927 states and 1261 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:32:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:03,088 INFO L93 Difference]: Finished difference Result 2266 states and 3111 transitions. [2022-04-06 19:32:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 19:32:03,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 110 [2022-04-06 19:32:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:03,092 INFO L225 Difference]: With dead ends: 2266 [2022-04-06 19:32:03,092 INFO L226 Difference]: Without dead ends: 1430 [2022-04-06 19:32:03,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 122 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=424, Invalid=4400, Unknown=10, NotChecked=136, Total=4970 [2022-04-06 19:32:03,093 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:03,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 36 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:32:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-04-06 19:32:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1016. [2022-04-06 19:32:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1000 states have (on average 1.384) internal successors, (1384), 1001 states have internal predecessors, (1384), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:32:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1399 transitions. [2022-04-06 19:32:03,713 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1399 transitions. Word has length 110 [2022-04-06 19:32:03,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:03,713 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1399 transitions. [2022-04-06 19:32:03,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:32:03,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1399 transitions. [2022-04-06 19:32:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:32:03,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:03,715 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:03,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:03,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 19:32:03,924 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:03,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:03,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1361698550, now seen corresponding path program 21 times [2022-04-06 19:32:03,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:03,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1436525545] [2022-04-06 19:32:03,925 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:03,925 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:03,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1361698550, now seen corresponding path program 22 times [2022-04-06 19:32:03,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:03,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860534488] [2022-04-06 19:32:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:03,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:03,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:03,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:32:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:04,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:32:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:04,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:32:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:04,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:32:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:04,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:32:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 130 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 19:32:04,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860534488] [2022-04-06 19:32:04,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860534488] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:04,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345889116] [2022-04-06 19:32:04,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:32:04,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:04,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:04,303 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:04,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 19:32:04,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:32:04,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:04,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 19:32:04,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:04,630 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-04-06 19:32:04,630 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 1 case distinctions, treesize of input 23 treesize of output 24 [2022-04-06 19:32:04,875 INFO L356 Elim1Store]: treesize reduction 147, result has 14.0 percent of original size [2022-04-06 19:32:04,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 42 [2022-04-06 19:32:05,034 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-06 19:32:05,035 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 34 treesize of output 10 [2022-04-06 19:32:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 90 proven. 123 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 19:32:05,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 171 proven. 28 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 19:32:05,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345889116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:32:05,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:32:05,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 14] total 50 [2022-04-06 19:32:05,798 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:05,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1436525545] [2022-04-06 19:32:05,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1436525545] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:05,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:05,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:32:05,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593038402] [2022-04-06 19:32:05,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:05,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:32:05,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:32:05,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2290, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:32:05,799 INFO L87 Difference]: Start difference. First operand 1016 states and 1399 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:32:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:08,742 INFO L93 Difference]: Finished difference Result 2132 states and 2958 transitions. [2022-04-06 19:32:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 19:32:08,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 110 [2022-04-06 19:32:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:08,745 INFO L225 Difference]: With dead ends: 2132 [2022-04-06 19:32:08,745 INFO L226 Difference]: Without dead ends: 1431 [2022-04-06 19:32:08,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=548, Invalid=6592, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 19:32:08,747 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 121 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:08,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 46 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:32:08,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2022-04-06 19:32:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1146. [2022-04-06 19:32:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1130 states have (on average 1.3654867256637169) internal successors, (1543), 1131 states have internal predecessors, (1543), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:32:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1558 transitions. [2022-04-06 19:32:09,497 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1558 transitions. Word has length 110 [2022-04-06 19:32:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:09,497 INFO L478 AbstractCegarLoop]: Abstraction has 1146 states and 1558 transitions. [2022-04-06 19:32:09,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:32:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1558 transitions. [2022-04-06 19:32:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:32:09,499 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:09,499 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:09,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:09,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 19:32:09,712 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:09,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1024810956, now seen corresponding path program 23 times [2022-04-06 19:32:09,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:09,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [596339197] [2022-04-06 19:32:09,713 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:09,713 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1024810956, now seen corresponding path program 24 times [2022-04-06 19:32:09,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:09,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061977198] [2022-04-06 19:32:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:09,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:09,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:09,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:32:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:10,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:32:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:32:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:10,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:32:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:10,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:32:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 47 proven. 179 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 19:32:10,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:10,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061977198] [2022-04-06 19:32:10,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061977198] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:10,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917281274] [2022-04-06 19:32:10,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:32:10,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:10,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:10,929 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:10,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 19:32:11,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 19:32:11,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 19:32:11,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:11,311 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:32:11,311 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 11 treesize of output 11 [2022-04-06 19:32:11,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:32:11,410 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:32:11,410 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:32:11,459 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:32:11,459 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:32:11,502 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 19:32:11,503 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 1 case distinctions, treesize of input 25 treesize of output 30 [2022-04-06 19:32:11,606 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 19:32:11,607 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 1 case distinctions, treesize of input 29 treesize of output 34 [2022-04-06 19:32:12,055 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 16 treesize of output 18 [2022-04-06 19:32:12,694 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 19:32:12,694 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 21 treesize of output 10 [2022-04-06 19:32:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 1 proven. 171 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 19:32:12,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:13,100 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1995 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_1995) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 16)) 4)) is different from false [2022-04-06 19:32:13,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917281274] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:13,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:32:13,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 23] total 55 [2022-04-06 19:32:13,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:13,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [596339197] [2022-04-06 19:32:13,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [596339197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:13,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:13,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 19:32:13,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264713272] [2022-04-06 19:32:13,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:13,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 19:32:13,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:13,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 19:32:13,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3526, Unknown=12, NotChecked=120, Total=3906 [2022-04-06 19:32:13,103 INFO L87 Difference]: Start difference. First operand 1146 states and 1558 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:32:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:26,918 INFO L93 Difference]: Finished difference Result 3247 states and 4448 transitions. [2022-04-06 19:32:26,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 19:32:26,919 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 110 [2022-04-06 19:32:26,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:26,924 INFO L225 Difference]: With dead ends: 3247 [2022-04-06 19:32:26,924 INFO L226 Difference]: Without dead ends: 2448 [2022-04-06 19:32:26,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 124 SyntacticMatches, 13 SemanticMatches, 159 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8437 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=2493, Invalid=22881, Unknown=70, NotChecked=316, Total=25760 [2022-04-06 19:32:26,927 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 314 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:26,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 26 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:32:26,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2022-04-06 19:32:28,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2216. [2022-04-06 19:32:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2200 states have (on average 1.3745454545454545) internal successors, (3024), 2201 states have internal predecessors, (3024), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:32:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 3039 transitions. [2022-04-06 19:32:28,543 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 3039 transitions. Word has length 110 [2022-04-06 19:32:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:28,544 INFO L478 AbstractCegarLoop]: Abstraction has 2216 states and 3039 transitions. [2022-04-06 19:32:28,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:32:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 3039 transitions. [2022-04-06 19:32:28,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:32:28,549 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:28,549 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:28,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:28,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 19:32:28,763 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2054002614, now seen corresponding path program 25 times [2022-04-06 19:32:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:28,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [250604709] [2022-04-06 19:32:28,764 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:28,764 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2054002614, now seen corresponding path program 26 times [2022-04-06 19:32:28,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:28,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485835971] [2022-04-06 19:32:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:28,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:28,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:28,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:32:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:30,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:32:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:30,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:32:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:30,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:32:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:30,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:32:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 23 proven. 203 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 19:32:30,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485835971] [2022-04-06 19:32:30,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485835971] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43014791] [2022-04-06 19:32:30,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:32:30,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:30,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:30,180 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:30,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 19:32:30,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:32:30,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:30,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 19:32:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:30,391 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:32:30,391 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 11 treesize of output 11 [2022-04-06 19:32:30,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:32:30,506 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:32:30,506 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:32:30,561 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:32:30,561 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:32:30,613 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:32:30,613 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:32:30,669 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-04-06 19:32:30,670 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-04-06 19:32:31,096 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 16 treesize of output 18 [2022-04-06 19:32:31,798 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 19:32:31,798 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 21 treesize of output 10 [2022-04-06 19:32:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 9 proven. 163 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 19:32:31,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:32,252 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2086 (Array Int Int))) (= 4 (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_2086) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 16)))) is different from false [2022-04-06 19:32:32,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43014791] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:32,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:32:32,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 22] total 56 [2022-04-06 19:32:32,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:32,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [250604709] [2022-04-06 19:32:32,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [250604709] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:32,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:32,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 19:32:32,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591102280] [2022-04-06 19:32:32,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:32,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 19:32:32,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:32,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 19:32:32,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3669, Unknown=11, NotChecked=122, Total=4032 [2022-04-06 19:32:32,255 INFO L87 Difference]: Start difference. First operand 2216 states and 3039 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 34 states have internal predecessors, (63), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:32:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:44,865 INFO L93 Difference]: Finished difference Result 3068 states and 4214 transitions. [2022-04-06 19:32:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 19:32:44,865 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 34 states have internal predecessors, (63), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 110 [2022-04-06 19:32:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:44,871 INFO L225 Difference]: With dead ends: 3068 [2022-04-06 19:32:44,871 INFO L226 Difference]: Without dead ends: 2901 [2022-04-06 19:32:44,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 124 SyntacticMatches, 13 SemanticMatches, 143 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=2026, Invalid=18529, Unknown=41, NotChecked=284, Total=20880 [2022-04-06 19:32:44,873 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 201 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:44,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 33 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 19:32:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2022-04-06 19:32:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2224. [2022-04-06 19:32:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2208 states have (on average 1.3718297101449275) internal successors, (3029), 2209 states have internal predecessors, (3029), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:32:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3044 transitions. [2022-04-06 19:32:46,613 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3044 transitions. Word has length 110 [2022-04-06 19:32:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:46,613 INFO L478 AbstractCegarLoop]: Abstraction has 2224 states and 3044 transitions. [2022-04-06 19:32:46,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 34 states have internal predecessors, (63), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:32:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3044 transitions. [2022-04-06 19:32:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:32:46,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:46,616 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:46,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 19:32:46,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:46,817 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash -498967174, now seen corresponding path program 27 times [2022-04-06 19:32:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:46,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1153321686] [2022-04-06 19:32:46,818 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:46,818 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:46,818 INFO L85 PathProgramCache]: Analyzing trace with hash -498967174, now seen corresponding path program 28 times [2022-04-06 19:32:46,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:46,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105575356] [2022-04-06 19:32:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:46,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:47,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:47,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:32:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:47,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:32:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:47,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:32:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:47,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:32:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:47,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:32:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 168 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-04-06 19:32:47,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:47,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105575356] [2022-04-06 19:32:47,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105575356] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:47,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249263470] [2022-04-06 19:32:47,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:32:47,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:47,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:47,399 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:47,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 19:32:47,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:32:47,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:47,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 19:32:47,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:47,623 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 15 treesize of output 11 [2022-04-06 19:32:47,680 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 19:32:47,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-04-06 19:32:47,717 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 19:32:47,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-04-06 19:32:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:32:47,750 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 30 treesize of output 29 [2022-04-06 19:32:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:32:47,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:32:47,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:32:47,819 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:32:47,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 46 [2022-04-06 19:32:48,771 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-04-06 19:32:48,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 55 [2022-04-06 19:32:49,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:32:49,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:32:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:32:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:32:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:32:49,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:32:49,904 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:32:49,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 20 [2022-04-06 19:32:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 5 proven. 257 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 19:32:50,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:32:50,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249263470] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:50,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:32:50,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 34] total 55 [2022-04-06 19:32:50,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1153321686] [2022-04-06 19:32:50,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1153321686] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:50,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:50,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:32:50,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470468517] [2022-04-06 19:32:50,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:50,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:32:50,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:50,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:32:50,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=3473, Unknown=18, NotChecked=0, Total=3782 [2022-04-06 19:32:50,354 INFO L87 Difference]: Start difference. First operand 2224 states and 3044 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 19:32:53,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:53,333 INFO L93 Difference]: Finished difference Result 2236 states and 3056 transitions. [2022-04-06 19:32:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:32:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 110 [2022-04-06 19:32:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:53,338 INFO L225 Difference]: With dead ends: 2236 [2022-04-06 19:32:53,338 INFO L226 Difference]: Without dead ends: 2234 [2022-04-06 19:32:53,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 117 SyntacticMatches, 13 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=628, Invalid=6325, Unknown=19, NotChecked=0, Total=6972 [2022-04-06 19:32:53,339 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 143 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:53,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 47 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:32:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2022-04-06 19:32:55,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2232. [2022-04-06 19:32:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2214 states have (on average 1.3708220415537489) internal successors, (3035), 2215 states have internal predecessors, (3035), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 19:32:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 3052 transitions. [2022-04-06 19:32:55,095 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 3052 transitions. Word has length 110 [2022-04-06 19:32:55,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:55,096 INFO L478 AbstractCegarLoop]: Abstraction has 2232 states and 3052 transitions. [2022-04-06 19:32:55,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 19:32:55,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 3052 transitions. [2022-04-06 19:32:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 19:32:55,099 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:55,099 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:55,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 19:32:55,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 19:32:55,299 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1164108910, now seen corresponding path program 29 times [2022-04-06 19:32:55,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:55,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1238425788] [2022-04-06 19:32:55,300 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:32:55,300 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:32:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1164108910, now seen corresponding path program 30 times [2022-04-06 19:32:55,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:55,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013467962] [2022-04-06 19:32:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:55,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:55,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:55,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:32:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:55,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 19:32:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:55,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 19:32:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:55,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 19:32:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:55,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 19:32:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:55,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 19:32:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-04-06 19:32:55,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:55,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013467962] [2022-04-06 19:32:55,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013467962] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:32:55,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852314762] [2022-04-06 19:32:55,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:32:55,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:32:55,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:55,385 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:32:55,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 19:32:55,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 19:32:55,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:32:55,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:32:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:32:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-04-06 19:32:55,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:32:55,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852314762] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:55,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:32:55,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2022-04-06 19:32:55,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:55,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1238425788] [2022-04-06 19:32:55,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1238425788] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:55,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:55,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:32:55,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286899338] [2022-04-06 19:32:55,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:55,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:32:55,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:55,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:32:55,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:32:55,916 INFO L87 Difference]: Start difference. First operand 2232 states and 3052 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-04-06 19:32:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:57,673 INFO L93 Difference]: Finished difference Result 2235 states and 3055 transitions. [2022-04-06 19:32:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:32:57,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 118 [2022-04-06 19:32:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:57,674 INFO L225 Difference]: With dead ends: 2235 [2022-04-06 19:32:57,674 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 19:32:57,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:32:57,677 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:57,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 70 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:57,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 19:32:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 19:32:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 19:32:57,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 19:32:57,678 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-04-06 19:32:57,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:57,678 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 19:32:57,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-04-06 19:32:57,678 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 19:32:57,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 19:32:57,680 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 19:32:57,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 19:32:57,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 19:32:57,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.