/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-b030c9e [2022-03-20 17:45:52,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:45:52,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:45:52,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:45:52,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:45:52,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:45:52,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:45:52,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:45:52,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:45:52,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:45:52,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:45:52,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:45:52,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:45:52,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:45:52,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:45:52,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:45:52,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:45:52,542 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:45:52,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:45:52,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:45:52,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:45:52,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:45:52,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:45:52,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:45:52,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:45:52,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:45:52,543 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:45:52,543 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:45:52,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:45:52,544 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:45:52,544 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:45:52,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:45:52,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:45:52,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:45:52,782 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:45:52,784 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:45:52,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2022-03-20 17:45:52,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f423771/9b60a70ebe7446618b16f007909c0062/FLAGd746a6f93 [2022-03-20 17:45:53,223 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:45:53,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i [2022-03-20 17:45:53,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f423771/9b60a70ebe7446618b16f007909c0062/FLAGd746a6f93 [2022-03-20 17:45:53,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f423771/9b60a70ebe7446618b16f007909c0062 [2022-03-20 17:45:53,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:45:53,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:45:53,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:45:53,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:45:53,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:45:53,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70127bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53, skipping insertion in model container [2022-03-20 17:45:53,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:45:53,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:45:53,385 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] [2022-03-20 17:45:53,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:45:53,403 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:45:53,414 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] [2022-03-20 17:45:53,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:45:53,445 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:45:53,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53 WrapperNode [2022-03-20 17:45:53,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:45:53,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:45:53,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:45:53,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:45:53,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:45:53,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:45:53,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:45:53,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:45:53,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (1/1) ... [2022-03-20 17:45:53,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:45:53,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:53,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:45:53,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:45:53,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:45:53,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:45:53,534 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:45:53,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:45:53,534 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2022-03-20 17:45:53,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:45:53,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:45:53,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:45:53,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 17:45:53,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 17:45:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:45:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:45:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:45:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2022-03-20 17:45:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:45:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:45:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:45:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 17:45:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:45:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:45:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:45:53,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:45:53,609 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:45:53,610 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:45:53,768 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:45:53,773 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:45:53,773 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-20 17:45:53,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:45:53 BoogieIcfgContainer [2022-03-20 17:45:53,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:45:53,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:45:53,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:45:53,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:45:53,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:45:53" (1/3) ... [2022-03-20 17:45:53,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464156fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:45:53, skipping insertion in model container [2022-03-20 17:45:53,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:53" (2/3) ... [2022-03-20 17:45:53,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464156fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:45:53, skipping insertion in model container [2022-03-20 17:45:53,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:45:53" (3/3) ... [2022-03-20 17:45:53,781 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2022-03-20 17:45:53,785 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:45:53,785 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:45:53,817 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:45:53,823 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:45:53,823 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:45:53,844 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) [2022-03-20 17:45:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 17:45:53,851 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:53,851 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:45:53,852 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:53,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:53,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1995632546, now seen corresponding path program 1 times [2022-03-20 17:45:53,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:53,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [74458757] [2022-03-20 17:45:53,885 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:45:53,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1995632546, now seen corresponding path program 2 times [2022-03-20 17:45:53,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:53,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033949404] [2022-03-20 17:45:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:53,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:45:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:45:54,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:54,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033949404] [2022-03-20 17:45:54,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033949404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:54,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:54,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:45:54,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:54,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [74458757] [2022-03-20 17:45:54,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [74458757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:54,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:54,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:45:54,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62421756] [2022-03-20 17:45:54,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:54,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:45:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:54,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:45:54,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:45:54,233 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) [2022-03-20 17:45:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:54,409 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2022-03-20 17:45:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:45:54,412 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 [2022-03-20 17:45:54,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:54,422 INFO L225 Difference]: With dead ends: 77 [2022-03-20 17:45:54,423 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 17:45:54,426 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 [2022-03-20 17:45:54,429 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 [2022-03-20 17:45:54,431 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] [2022-03-20 17:45:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 17:45:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-03-20 17:45:54,481 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) [2022-03-20 17:45:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-03-20 17:45:54,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2022-03-20 17:45:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:54,484 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-03-20 17:45:54,485 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) [2022-03-20 17:45:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-03-20 17:45:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 17:45:54,487 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:54,488 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:45:54,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:45:54,488 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1221136232, now seen corresponding path program 1 times [2022-03-20 17:45:54,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:54,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [330276914] [2022-03-20 17:45:54,491 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:45:54,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1221136232, now seen corresponding path program 2 times [2022-03-20 17:45:54,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:54,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662071201] [2022-03-20 17:45:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:54,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 17:45:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:45:54,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:54,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662071201] [2022-03-20 17:45:54,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662071201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:54,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:54,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:45:54,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:54,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [330276914] [2022-03-20 17:45:54,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [330276914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:54,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:54,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:45:54,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352965291] [2022-03-20 17:45:54,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:54,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:45:54,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:45:54,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:45:54,617 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) [2022-03-20 17:45:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:54,770 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-03-20 17:45:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:45:54,772 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 [2022-03-20 17:45:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:54,779 INFO L225 Difference]: With dead ends: 59 [2022-03-20 17:45:54,779 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 17:45:54,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:45:54,783 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 [2022-03-20 17:45:54,783 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] [2022-03-20 17:45:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 17:45:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-03-20 17:45:54,797 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) [2022-03-20 17:45:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-20 17:45:54,799 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-03-20 17:45:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:54,799 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-20 17:45:54,799 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) [2022-03-20 17:45:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-20 17:45:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 17:45:54,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:54,800 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] [2022-03-20 17:45:54,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:45:54,801 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:54,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:54,801 INFO L85 PathProgramCache]: Analyzing trace with hash -957735862, now seen corresponding path program 1 times [2022-03-20 17:45:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:54,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293412388] [2022-03-20 17:45:54,814 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:54,814 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash -957735862, now seen corresponding path program 2 times [2022-03-20 17:45:54,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:54,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306441916] [2022-03-20 17:45:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:54,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:45:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:45:54,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:54,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306441916] [2022-03-20 17:45:54,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306441916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:54,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920220636] [2022-03-20 17:45:54,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:45:54,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:54,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:54,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:54,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:45:54,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 17:45:54,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 17:45:54,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:55,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:45:55,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920220636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:55,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:45:55,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-03-20 17:45:55,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:55,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293412388] [2022-03-20 17:45:55,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293412388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:55,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:55,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:45:55,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669307543] [2022-03-20 17:45:55,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:55,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:45:55,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:55,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:45:55,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:45:55,111 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) [2022-03-20 17:45:55,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:55,155 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-03-20 17:45:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:45:55,156 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 [2022-03-20 17:45:55,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:55,158 INFO L225 Difference]: With dead ends: 49 [2022-03-20 17:45:55,158 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 17:45:55,159 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 [2022-03-20 17:45:55,164 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 [2022-03-20 17:45:55,169 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] [2022-03-20 17:45:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 17:45:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-03-20 17:45:55,180 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) [2022-03-20 17:45:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-03-20 17:45:55,181 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2022-03-20 17:45:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:55,181 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-03-20 17:45:55,181 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) [2022-03-20 17:45:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-03-20 17:45:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 17:45:55,182 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:55,182 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] [2022-03-20 17:45:55,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 17:45:55,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:55,383 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:55,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1438458526, now seen corresponding path program 1 times [2022-03-20 17:45:55,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:55,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [278926661] [2022-03-20 17:45:55,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:55,385 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1438458526, now seen corresponding path program 2 times [2022-03-20 17:45:55,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:55,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690642865] [2022-03-20 17:45:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:55,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:55,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:55,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:45:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:55,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:55,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690642865] [2022-03-20 17:45:55,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690642865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:55,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332407613] [2022-03-20 17:45:55,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:45:55,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:55,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:55,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:55,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:45:55,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:45:55,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:55,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 17:45:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:55,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:45:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:55,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332407613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:45:55,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:45:55,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-03-20 17:45:55,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:55,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [278926661] [2022-03-20 17:45:55,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [278926661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:55,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:55,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:45:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662770028] [2022-03-20 17:45:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:55,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:45:55,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:45:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:45:55,659 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) [2022-03-20 17:45:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:55,788 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-03-20 17:45:55,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:45:55,789 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 [2022-03-20 17:45:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:55,790 INFO L225 Difference]: With dead ends: 60 [2022-03-20 17:45:55,790 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 17:45:55,790 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 [2022-03-20 17:45:55,792 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:45:55,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 25 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:45:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 17:45:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-03-20 17:45:55,803 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) [2022-03-20 17:45:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-20 17:45:55,803 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2022-03-20 17:45:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:55,804 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-20 17:45:55,804 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) [2022-03-20 17:45:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-20 17:45:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 17:45:55,804 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:55,805 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] [2022-03-20 17:45:55,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 17:45:56,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 17:45:56,024 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash -911525692, now seen corresponding path program 3 times [2022-03-20 17:45:56,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:56,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1944367197] [2022-03-20 17:45:56,026 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:56,026 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:56,026 INFO L85 PathProgramCache]: Analyzing trace with hash -911525692, now seen corresponding path program 4 times [2022-03-20 17:45:56,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:56,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615476715] [2022-03-20 17:45:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:56,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:56,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:45:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:45:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615476715] [2022-03-20 17:45:56,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615476715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:56,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755175107] [2022-03-20 17:45:56,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:45:56,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:56,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:56,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:56,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 17:45:56,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:45:56,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:56,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 17:45:56,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:56,226 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 [2022-03-20 17:45:56,479 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 17:45:56,479 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 [2022-03-20 17:45:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:56,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:45:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 17:45:56,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755175107] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:56,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:45:56,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 12] total 24 [2022-03-20 17:45:56,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:56,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1944367197] [2022-03-20 17:45:56,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1944367197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:56,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:56,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:45:56,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770686546] [2022-03-20 17:45:56,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:56,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:45:56,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:56,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:45:56,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:45:56,939 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) [2022-03-20 17:45:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:57,100 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-03-20 17:45:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:45:57,101 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 [2022-03-20 17:45:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:57,103 INFO L225 Difference]: With dead ends: 58 [2022-03-20 17:45:57,103 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 17:45:57,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-03-20 17:45:57,104 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:45:57,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 160 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-03-20 17:45:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 17:45:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2022-03-20 17:45:57,115 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) [2022-03-20 17:45:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-03-20 17:45:57,116 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2022-03-20 17:45:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:57,116 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-03-20 17:45:57,117 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) [2022-03-20 17:45:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-03-20 17:45:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:45:57,117 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:57,118 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] [2022-03-20 17:45:57,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 17:45:57,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:57,335 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:57,335 INFO L85 PathProgramCache]: Analyzing trace with hash -588044416, now seen corresponding path program 1 times [2022-03-20 17:45:57,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:57,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1655101099] [2022-03-20 17:45:57,337 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:57,337 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:57,337 INFO L85 PathProgramCache]: Analyzing trace with hash -588044416, now seen corresponding path program 2 times [2022-03-20 17:45:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:57,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077030914] [2022-03-20 17:45:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:57,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:57,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:45:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:45:57,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:57,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077030914] [2022-03-20 17:45:57,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077030914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:57,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772376257] [2022-03-20 17:45:57,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:45:57,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:57,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:57,424 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:57,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 17:45:57,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:45:57,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:57,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:45:57,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:45:57,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:45:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:45:57,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772376257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:45:57,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:45:57,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2022-03-20 17:45:57,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:57,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1655101099] [2022-03-20 17:45:57,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1655101099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:57,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:57,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:45:57,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277536317] [2022-03-20 17:45:57,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:57,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:45:57,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:57,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:45:57,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:45:57,684 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) [2022-03-20 17:45:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:57,876 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2022-03-20 17:45:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:45:57,877 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 [2022-03-20 17:45:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:57,878 INFO L225 Difference]: With dead ends: 86 [2022-03-20 17:45:57,878 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 17:45:57,878 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 [2022-03-20 17:45:57,879 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 [2022-03-20 17:45:57,879 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] [2022-03-20 17:45:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 17:45:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-03-20 17:45:57,891 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) [2022-03-20 17:45:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-03-20 17:45:57,891 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 29 [2022-03-20 17:45:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:57,892 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-03-20 17:45:57,892 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) [2022-03-20 17:45:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-03-20 17:45:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:45:57,893 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:57,893 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] [2022-03-20 17:45:57,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 17:45:58,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:58,115 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:58,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1608016792, now seen corresponding path program 3 times [2022-03-20 17:45:58,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:58,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1286567575] [2022-03-20 17:45:58,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:58,116 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1608016792, now seen corresponding path program 4 times [2022-03-20 17:45:58,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:58,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740590123] [2022-03-20 17:45:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:58,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:58,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:58,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:45:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 17:45:58,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:58,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740590123] [2022-03-20 17:45:58,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740590123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:58,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224321422] [2022-03-20 17:45:58,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:45:58,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:58,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:58,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:58,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 17:45:58,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:45:58,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:58,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:45:58,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:45:58,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:45:58,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224321422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:58,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:45:58,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2022-03-20 17:45:58,329 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:58,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1286567575] [2022-03-20 17:45:58,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1286567575] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:58,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:58,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:45:58,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029277935] [2022-03-20 17:45:58,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:58,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:45:58,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:45:58,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:45:58,330 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) [2022-03-20 17:45:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:58,380 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2022-03-20 17:45:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:45:58,380 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 [2022-03-20 17:45:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:58,382 INFO L225 Difference]: With dead ends: 85 [2022-03-20 17:45:58,382 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 17:45:58,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:45:58,383 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 [2022-03-20 17:45:58,383 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] [2022-03-20 17:45:58,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 17:45:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-03-20 17:45:58,405 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) [2022-03-20 17:45:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-03-20 17:45:58,406 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2022-03-20 17:45:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:58,407 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-03-20 17:45:58,408 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) [2022-03-20 17:45:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-03-20 17:45:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:45:58,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:58,411 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] [2022-03-20 17:45:58,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 17:45:58,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:58,622 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:58,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:58,623 INFO L85 PathProgramCache]: Analyzing trace with hash 835149208, now seen corresponding path program 5 times [2022-03-20 17:45:58,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:58,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1111295060] [2022-03-20 17:45:58,624 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:58,624 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:58,624 INFO L85 PathProgramCache]: Analyzing trace with hash 835149208, now seen corresponding path program 6 times [2022-03-20 17:45:58,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:58,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426649124] [2022-03-20 17:45:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:58,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:58,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:58,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:45:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:45:58,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:58,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426649124] [2022-03-20 17:45:58,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426649124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:58,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984663921] [2022-03-20 17:45:58,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:45:58,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:58,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:58,706 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:58,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 17:45:58,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:45:58,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 17:45:58,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:45:58,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:45:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:45:59,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984663921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:45:59,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:45:59,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-03-20 17:45:59,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:59,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1111295060] [2022-03-20 17:45:59,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1111295060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:59,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:59,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:45:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68603185] [2022-03-20 17:45:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:59,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:45:59,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:59,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:45:59,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:45:59,029 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) [2022-03-20 17:45:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:59,260 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-03-20 17:45:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:45:59,260 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 [2022-03-20 17:45:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:59,261 INFO L225 Difference]: With dead ends: 70 [2022-03-20 17:45:59,261 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 17:45:59,261 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 [2022-03-20 17:45:59,262 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 [2022-03-20 17:45:59,262 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] [2022-03-20 17:45:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 17:45:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-03-20 17:45:59,269 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) [2022-03-20 17:45:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-03-20 17:45:59,270 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 33 [2022-03-20 17:45:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:59,270 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-03-20 17:45:59,270 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) [2022-03-20 17:45:59,270 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-03-20 17:45:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 17:45:59,271 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:59,271 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] [2022-03-20 17:45:59,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 17:45:59,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:59,487 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1075110444, now seen corresponding path program 7 times [2022-03-20 17:45:59,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:59,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2046047321] [2022-03-20 17:45:59,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:59,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:59,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1075110444, now seen corresponding path program 8 times [2022-03-20 17:45:59,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:59,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330408575] [2022-03-20 17:45:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:59,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:59,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:45:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 17:45:59,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:59,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330408575] [2022-03-20 17:45:59,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330408575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:59,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722555475] [2022-03-20 17:45:59,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:45:59,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:59,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:59,565 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:59,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 17:45:59,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:45:59,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:59,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:45:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 17:45:59,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:45:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 17:45:59,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722555475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:45:59,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:45:59,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-20 17:45:59,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:59,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2046047321] [2022-03-20 17:45:59,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2046047321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:59,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:59,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:45:59,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450675788] [2022-03-20 17:45:59,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:59,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:45:59,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:45:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:45:59,766 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) [2022-03-20 17:45:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:59,974 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-03-20 17:45:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:45:59,975 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 [2022-03-20 17:45:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:59,976 INFO L225 Difference]: With dead ends: 77 [2022-03-20 17:45:59,976 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 17:45:59,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:45:59,977 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 [2022-03-20 17:45:59,977 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] [2022-03-20 17:45:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 17:45:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-03-20 17:45:59,986 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) [2022-03-20 17:45:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-03-20 17:45:59,986 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 36 [2022-03-20 17:45:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:59,986 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-03-20 17:45:59,987 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) [2022-03-20 17:45:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-03-20 17:45:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 17:45:59,987 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:59,987 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] [2022-03-20 17:46:00,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:00,210 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:00,211 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:00,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:00,211 INFO L85 PathProgramCache]: Analyzing trace with hash 482252264, now seen corresponding path program 9 times [2022-03-20 17:46:00,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:00,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1808589919] [2022-03-20 17:46:00,212 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:00,212 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:00,212 INFO L85 PathProgramCache]: Analyzing trace with hash 482252264, now seen corresponding path program 10 times [2022-03-20 17:46:00,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:00,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310871232] [2022-03-20 17:46:00,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:00,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 17:46:00,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:00,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310871232] [2022-03-20 17:46:00,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310871232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:00,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174059963] [2022-03-20 17:46:00,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:00,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:00,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:00,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:00,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 17:46:00,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:00,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:00,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 17:46:00,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:46:00,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:46:00,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174059963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:00,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:00,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-20 17:46:00,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:00,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1808589919] [2022-03-20 17:46:00,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1808589919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:00,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:00,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:46:00,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033724013] [2022-03-20 17:46:00,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:00,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:46:00,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:00,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:46:00,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:46:00,547 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) [2022-03-20 17:46:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:00,781 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-03-20 17:46:00,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:46:00,782 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 [2022-03-20 17:46:00,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:00,782 INFO L225 Difference]: With dead ends: 80 [2022-03-20 17:46:00,782 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 17:46:00,783 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 [2022-03-20 17:46:00,784 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 [2022-03-20 17:46:00,784 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] [2022-03-20 17:46:00,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 17:46:00,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-03-20 17:46:00,794 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) [2022-03-20 17:46:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-03-20 17:46:00,794 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 39 [2022-03-20 17:46:00,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:00,795 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-03-20 17:46:00,795 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) [2022-03-20 17:46:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-03-20 17:46:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 17:46:00,818 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:00,818 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] [2022-03-20 17:46:00,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:01,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 17:46:01,040 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash -450266964, now seen corresponding path program 11 times [2022-03-20 17:46:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:01,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1881742143] [2022-03-20 17:46:01,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:01,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:01,041 INFO L85 PathProgramCache]: Analyzing trace with hash -450266964, now seen corresponding path program 12 times [2022-03-20 17:46:01,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:01,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667768335] [2022-03-20 17:46:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:01,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:01,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:01,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 17:46:01,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:01,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667768335] [2022-03-20 17:46:01,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667768335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:01,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547679515] [2022-03-20 17:46:01,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:01,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:01,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:01,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:01,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 17:46:01,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 17:46:01,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:01,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 17:46:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 17:46:01,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 17:46:01,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547679515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:01,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:01,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 7] total 19 [2022-03-20 17:46:01,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:01,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1881742143] [2022-03-20 17:46:01,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1881742143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:01,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:01,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:01,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327911634] [2022-03-20 17:46:01,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:01,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:46:01,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:01,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:46:01,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:46:01,571 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) [2022-03-20 17:46:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:01,820 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-03-20 17:46:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:46:01,820 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 [2022-03-20 17:46:01,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:01,821 INFO L225 Difference]: With dead ends: 83 [2022-03-20 17:46:01,821 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 17:46:01,821 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 [2022-03-20 17:46:01,822 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 [2022-03-20 17:46:01,822 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] [2022-03-20 17:46:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 17:46:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-03-20 17:46:01,831 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) [2022-03-20 17:46:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-03-20 17:46:01,832 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 42 [2022-03-20 17:46:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:01,832 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-03-20 17:46:01,832 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) [2022-03-20 17:46:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-03-20 17:46:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 17:46:01,832 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:01,833 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] [2022-03-20 17:46:01,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 17:46:02,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:02,033 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:02,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1282117784, now seen corresponding path program 13 times [2022-03-20 17:46:02,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:02,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [595591066] [2022-03-20 17:46:02,035 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:02,035 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1282117784, now seen corresponding path program 14 times [2022-03-20 17:46:02,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:02,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622716549] [2022-03-20 17:46:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:02,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:02,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:02,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 17:46:02,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:02,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622716549] [2022-03-20 17:46:02,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622716549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:02,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532015568] [2022-03-20 17:46:02,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:02,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:02,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:02,130 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:02,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 17:46:02,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:02,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:02,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:46:02,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 17:46:02,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 17:46:02,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532015568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:02,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:02,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2022-03-20 17:46:02,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:02,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [595591066] [2022-03-20 17:46:02,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [595591066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:02,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:02,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:46:02,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299524350] [2022-03-20 17:46:02,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:02,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:46:02,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:02,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:46:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:46:02,377 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) [2022-03-20 17:46:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:02,663 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2022-03-20 17:46:02,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:46:02,663 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 [2022-03-20 17:46:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:02,664 INFO L225 Difference]: With dead ends: 87 [2022-03-20 17:46:02,664 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 17:46:02,664 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 [2022-03-20 17:46:02,665 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 [2022-03-20 17:46:02,665 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] [2022-03-20 17:46:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 17:46:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2022-03-20 17:46:02,679 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) [2022-03-20 17:46:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-03-20 17:46:02,679 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 45 [2022-03-20 17:46:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:02,680 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-03-20 17:46:02,680 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) [2022-03-20 17:46:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-03-20 17:46:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 17:46:02,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:02,681 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] [2022-03-20 17:46:02,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:02,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 17:46:02,894 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1463860828, now seen corresponding path program 15 times [2022-03-20 17:46:02,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:02,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1623739645] [2022-03-20 17:46:02,896 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:02,896 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1463860828, now seen corresponding path program 16 times [2022-03-20 17:46:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:02,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107847382] [2022-03-20 17:46:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:02,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:02,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:02,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 17:46:02,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:03,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107847382] [2022-03-20 17:46:03,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107847382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:03,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565284195] [2022-03-20 17:46:03,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:03,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:03,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:03,005 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:03,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 17:46:03,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:03,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:03,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 17:46:03,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 17 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:46:03,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 17 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:46:03,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565284195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:03,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:03,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2022-03-20 17:46:03,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:03,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1623739645] [2022-03-20 17:46:03,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1623739645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:03,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:03,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:03,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255572618] [2022-03-20 17:46:03,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:03,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:46:03,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:03,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:46:03,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:46:03,342 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) [2022-03-20 17:46:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:03,619 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-03-20 17:46:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 17:46:03,619 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 [2022-03-20 17:46:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:03,620 INFO L225 Difference]: With dead ends: 90 [2022-03-20 17:46:03,620 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 17:46:03,621 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 [2022-03-20 17:46:03,621 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 [2022-03-20 17:46:03,621 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] [2022-03-20 17:46:03,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 17:46:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-03-20 17:46:03,632 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) [2022-03-20 17:46:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-03-20 17:46:03,632 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 48 [2022-03-20 17:46:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:03,632 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-03-20 17:46:03,633 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) [2022-03-20 17:46:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-03-20 17:46:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 17:46:03,633 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:03,633 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] [2022-03-20 17:46:03,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 17:46:03,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 17:46:03,847 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash 670604008, now seen corresponding path program 17 times [2022-03-20 17:46:03,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:03,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1311737201] [2022-03-20 17:46:03,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:03,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:03,849 INFO L85 PathProgramCache]: Analyzing trace with hash 670604008, now seen corresponding path program 18 times [2022-03-20 17:46:03,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:03,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081828364] [2022-03-20 17:46:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:46:03,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:03,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081828364] [2022-03-20 17:46:03,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081828364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:03,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143370266] [2022-03-20 17:46:03,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:03,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:03,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:03,932 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:03,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 17:46:03,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 17:46:03,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:03,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 17:46:03,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:46:04,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:46:04,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143370266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:04,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:04,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-03-20 17:46:04,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:04,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1311737201] [2022-03-20 17:46:04,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1311737201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:04,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:04,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:04,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744027812] [2022-03-20 17:46:04,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:04,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:46:04,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:04,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:46:04,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:46:04,373 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) [2022-03-20 17:46:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:04,589 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2022-03-20 17:46:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:46:04,589 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 [2022-03-20 17:46:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:04,590 INFO L225 Difference]: With dead ends: 87 [2022-03-20 17:46:04,590 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 17:46:04,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:46:04,591 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 [2022-03-20 17:46:04,592 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] [2022-03-20 17:46:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 17:46:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2022-03-20 17:46:04,606 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) [2022-03-20 17:46:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2022-03-20 17:46:04,606 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 51 [2022-03-20 17:46:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:04,606 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2022-03-20 17:46:04,607 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) [2022-03-20 17:46:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2022-03-20 17:46:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 17:46:04,607 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:04,608 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] [2022-03-20 17:46:04,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:04,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 17:46:04,823 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:04,824 INFO L85 PathProgramCache]: Analyzing trace with hash -862659328, now seen corresponding path program 19 times [2022-03-20 17:46:04,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:04,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1583796878] [2022-03-20 17:46:04,825 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:04,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash -862659328, now seen corresponding path program 20 times [2022-03-20 17:46:04,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:04,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57461499] [2022-03-20 17:46:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:04,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:04,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:04,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:46:04,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:04,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57461499] [2022-03-20 17:46:04,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57461499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:04,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554166235] [2022-03-20 17:46:04,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:04,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:04,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:04,911 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:04,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 17:46:05,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:05,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:46:05,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-03-20 17:46:05,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-03-20 17:46:05,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554166235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:05,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:05,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2022-03-20 17:46:05,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:05,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1583796878] [2022-03-20 17:46:05,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1583796878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:05,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:05,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:46:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673452832] [2022-03-20 17:46:05,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:05,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:46:05,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:46:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:46:05,176 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) [2022-03-20 17:46:05,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:05,415 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-03-20 17:46:05,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:46:05,415 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 [2022-03-20 17:46:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:05,416 INFO L225 Difference]: With dead ends: 90 [2022-03-20 17:46:05,416 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 17:46:05,416 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 [2022-03-20 17:46:05,417 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 [2022-03-20 17:46:05,417 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] [2022-03-20 17:46:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 17:46:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2022-03-20 17:46:05,429 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) [2022-03-20 17:46:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-03-20 17:46:05,429 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 55 [2022-03-20 17:46:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:05,430 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-03-20 17:46:05,430 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) [2022-03-20 17:46:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-03-20 17:46:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 17:46:05,430 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:05,430 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] [2022-03-20 17:46:05,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:05,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 17:46:05,643 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:05,644 INFO L85 PathProgramCache]: Analyzing trace with hash -804107836, now seen corresponding path program 21 times [2022-03-20 17:46:05,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:05,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [618349004] [2022-03-20 17:46:05,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:05,645 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:05,645 INFO L85 PathProgramCache]: Analyzing trace with hash -804107836, now seen corresponding path program 22 times [2022-03-20 17:46:05,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:05,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522614212] [2022-03-20 17:46:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:05,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:05,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:05,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:46:05,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:05,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522614212] [2022-03-20 17:46:05,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522614212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:05,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068514706] [2022-03-20 17:46:05,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:05,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:05,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:05,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:05,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 17:46:05,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:05,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:05,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 17:46:05,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 90 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 17:46:05,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 90 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 17:46:06,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068514706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:06,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:06,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2022-03-20 17:46:06,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:06,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [618349004] [2022-03-20 17:46:06,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [618349004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:06,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:06,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:06,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146361031] [2022-03-20 17:46:06,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:06,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:46:06,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:06,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:46:06,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:46:06,059 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) [2022-03-20 17:46:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:06,388 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2022-03-20 17:46:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:46:06,389 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 [2022-03-20 17:46:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:06,389 INFO L225 Difference]: With dead ends: 100 [2022-03-20 17:46:06,389 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 17:46:06,390 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 [2022-03-20 17:46:06,390 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 [2022-03-20 17:46:06,390 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] [2022-03-20 17:46:06,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 17:46:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-03-20 17:46:06,405 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) [2022-03-20 17:46:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-03-20 17:46:06,406 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 58 [2022-03-20 17:46:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:06,407 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-03-20 17:46:06,407 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) [2022-03-20 17:46:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-03-20 17:46:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 17:46:06,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:06,407 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] [2022-03-20 17:46:06,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 17:46:06,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:06,615 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:06,616 INFO L85 PathProgramCache]: Analyzing trace with hash -253331840, now seen corresponding path program 23 times [2022-03-20 17:46:06,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:06,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [80422688] [2022-03-20 17:46:06,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:06,617 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:06,617 INFO L85 PathProgramCache]: Analyzing trace with hash -253331840, now seen corresponding path program 24 times [2022-03-20 17:46:06,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:06,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747976134] [2022-03-20 17:46:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:06,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:06,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:06,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 17:46:06,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:06,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747976134] [2022-03-20 17:46:06,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747976134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:06,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846790060] [2022-03-20 17:46:06,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:06,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:06,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:06,724 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:06,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 17:46:06,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:06,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:06,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:46:06,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-03-20 17:46:06,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-03-20 17:46:06,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846790060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:06,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:06,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2022-03-20 17:46:06,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:06,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [80422688] [2022-03-20 17:46:06,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [80422688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:06,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:06,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:46:06,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628807994] [2022-03-20 17:46:06,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:06,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:46:06,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:46:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:46:06,976 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) [2022-03-20 17:46:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:07,190 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-03-20 17:46:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:46:07,190 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 [2022-03-20 17:46:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:07,191 INFO L225 Difference]: With dead ends: 97 [2022-03-20 17:46:07,191 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 17:46:07,191 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 [2022-03-20 17:46:07,192 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 [2022-03-20 17:46:07,192 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] [2022-03-20 17:46:07,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 17:46:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-03-20 17:46:07,204 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) [2022-03-20 17:46:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-03-20 17:46:07,204 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 61 [2022-03-20 17:46:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:07,204 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-03-20 17:46:07,204 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) [2022-03-20 17:46:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-03-20 17:46:07,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 17:46:07,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:07,205 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] [2022-03-20 17:46:07,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:07,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 17:46:07,406 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:07,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1836788888, now seen corresponding path program 25 times [2022-03-20 17:46:07,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:07,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [87508857] [2022-03-20 17:46:07,407 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:07,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:07,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1836788888, now seen corresponding path program 26 times [2022-03-20 17:46:07,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:07,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870764562] [2022-03-20 17:46:07,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:07,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:07,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:07,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 17:46:07,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870764562] [2022-03-20 17:46:07,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870764562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100211492] [2022-03-20 17:46:07,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:07,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:07,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:07,533 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:07,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 17:46:07,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:46:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 17:46:07,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 17:46:07,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100211492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:07,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:07,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2022-03-20 17:46:07,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:07,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [87508857] [2022-03-20 17:46:07,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [87508857] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:07,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:07,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:07,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862170721] [2022-03-20 17:46:07,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:07,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:46:07,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:07,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:46:07,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:46:07,801 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) [2022-03-20 17:46:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:08,105 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2022-03-20 17:46:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 17:46:08,105 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 [2022-03-20 17:46:08,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:08,106 INFO L225 Difference]: With dead ends: 100 [2022-03-20 17:46:08,106 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 17:46:08,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:46:08,106 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 [2022-03-20 17:46:08,107 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] [2022-03-20 17:46:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 17:46:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2022-03-20 17:46:08,118 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) [2022-03-20 17:46:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2022-03-20 17:46:08,119 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 65 [2022-03-20 17:46:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:08,119 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2022-03-20 17:46:08,119 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) [2022-03-20 17:46:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2022-03-20 17:46:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:46:08,119 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:08,119 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] [2022-03-20 17:46:08,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:08,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 17:46:08,320 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:08,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash -509955284, now seen corresponding path program 27 times [2022-03-20 17:46:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:08,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [994984752] [2022-03-20 17:46:08,321 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:08,321 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash -509955284, now seen corresponding path program 28 times [2022-03-20 17:46:08,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:08,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788654025] [2022-03-20 17:46:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:08,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:08,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 17:46:08,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:08,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788654025] [2022-03-20 17:46:08,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788654025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:08,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711769809] [2022-03-20 17:46:08,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:08,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:08,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:08,436 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:08,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 17:46:08,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:08,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:08,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 17:46:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 16 proven. 169 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-20 17:46:08,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 16 proven. 169 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-20 17:46:08,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711769809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:08,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:08,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2022-03-20 17:46:08,815 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:08,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [994984752] [2022-03-20 17:46:08,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [994984752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:08,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:08,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:08,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106743900] [2022-03-20 17:46:08,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:08,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:46:08,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:46:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:46:08,817 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) [2022-03-20 17:46:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:09,095 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-03-20 17:46:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:46:09,096 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 [2022-03-20 17:46:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:09,096 INFO L225 Difference]: With dead ends: 104 [2022-03-20 17:46:09,096 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 17:46:09,097 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 [2022-03-20 17:46:09,098 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 [2022-03-20 17:46:09,098 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] [2022-03-20 17:46:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 17:46:09,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-03-20 17:46:09,115 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) [2022-03-20 17:46:09,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2022-03-20 17:46:09,115 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 68 [2022-03-20 17:46:09,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:09,116 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2022-03-20 17:46:09,116 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) [2022-03-20 17:46:09,116 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2022-03-20 17:46:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 17:46:09,116 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:09,117 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] [2022-03-20 17:46:09,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:09,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:09,332 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash 992555844, now seen corresponding path program 29 times [2022-03-20 17:46:09,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:09,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [504514802] [2022-03-20 17:46:09,333 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:09,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:09,333 INFO L85 PathProgramCache]: Analyzing trace with hash 992555844, now seen corresponding path program 30 times [2022-03-20 17:46:09,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:09,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521147098] [2022-03-20 17:46:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:09,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:09,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:09,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 17:46:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 17:46:09,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:09,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521147098] [2022-03-20 17:46:09,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521147098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:09,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605868971] [2022-03-20 17:46:09,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:09,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:09,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:09,415 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:09,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 17:46:09,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:09,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:46:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 17:46:09,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 17:46:09,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605868971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:09,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:09,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2022-03-20 17:46:09,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:09,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [504514802] [2022-03-20 17:46:09,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [504514802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:09,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:09,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:46:09,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717844579] [2022-03-20 17:46:09,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:09,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:46:09,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:09,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:46:09,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:46:09,691 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) [2022-03-20 17:46:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:09,815 INFO L93 Difference]: Finished difference Result 158 states and 196 transitions. [2022-03-20 17:46:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:46:09,815 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 [2022-03-20 17:46:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:09,816 INFO L225 Difference]: With dead ends: 158 [2022-03-20 17:46:09,816 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 17:46:09,816 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 [2022-03-20 17:46:09,818 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 17:46:09,819 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] [2022-03-20 17:46:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 17:46:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-03-20 17:46:09,838 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) [2022-03-20 17:46:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-03-20 17:46:09,838 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 72 [2022-03-20 17:46:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:09,838 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-03-20 17:46:09,838 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) [2022-03-20 17:46:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-03-20 17:46:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 17:46:09,839 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:09,839 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] [2022-03-20 17:46:09,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:10,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:10,040 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1493400922, now seen corresponding path program 31 times [2022-03-20 17:46:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:10,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1419193175] [2022-03-20 17:46:10,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:10,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1493400922, now seen corresponding path program 32 times [2022-03-20 17:46:10,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:10,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245447416] [2022-03-20 17:46:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:10,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:10,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:10,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:46:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 17:46:10,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:10,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245447416] [2022-03-20 17:46:10,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245447416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:10,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129236168] [2022-03-20 17:46:10,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:10,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:10,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:10,130 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:10,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 17:46:10,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:10,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:10,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 17:46:10,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 17:46:10,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 17:46:10,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129236168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:10,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:10,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2022-03-20 17:46:10,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:10,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1419193175] [2022-03-20 17:46:10,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1419193175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:10,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:10,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:10,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599091842] [2022-03-20 17:46:10,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:10,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:46:10,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:10,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:46:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:46:10,466 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) [2022-03-20 17:46:10,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:10,623 INFO L93 Difference]: Finished difference Result 160 states and 198 transitions. [2022-03-20 17:46:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:46:10,623 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 [2022-03-20 17:46:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:10,624 INFO L225 Difference]: With dead ends: 160 [2022-03-20 17:46:10,624 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 17:46:10,624 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 [2022-03-20 17:46:10,625 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 17:46:10,626 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] [2022-03-20 17:46:10,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 17:46:10,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-03-20 17:46:10,642 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) [2022-03-20 17:46:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-03-20 17:46:10,643 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 74 [2022-03-20 17:46:10,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:10,643 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-03-20 17:46:10,643 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) [2022-03-20 17:46:10,643 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-03-20 17:46:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 17:46:10,644 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:10,644 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] [2022-03-20 17:46:10,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:10,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:10,860 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1798930824, now seen corresponding path program 33 times [2022-03-20 17:46:10,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:10,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1710384575] [2022-03-20 17:46:10,861 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:10,861 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1798930824, now seen corresponding path program 34 times [2022-03-20 17:46:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:10,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676919857] [2022-03-20 17:46:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:10,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:10,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:10,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 17:46:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 17:46:10,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:10,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676919857] [2022-03-20 17:46:10,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676919857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:10,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732488501] [2022-03-20 17:46:10,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:10,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:10,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:10,964 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:10,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 17:46:11,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:11,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 17:46:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:11,496 INFO L356 Elim1Store]: treesize reduction 274, result has 11.6 percent of original size [2022-03-20 17:46:11,497 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 [2022-03-20 17:46:11,643 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-20 17:46:11,643 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 [2022-03-20 17:46:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 90 proven. 123 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-03-20 17:46:11,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:12,339 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 [2022-03-20 17:46:12,456 INFO L356 Elim1Store]: treesize reduction 117, result has 54.3 percent of original size [2022-03-20 17:46:12,456 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 [2022-03-20 17:46:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 165 proven. 26 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 17:46:13,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732488501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:13,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:13,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 21, 16] total 42 [2022-03-20 17:46:13,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:13,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1710384575] [2022-03-20 17:46:13,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1710384575] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:13,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:13,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:46:13,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695655810] [2022-03-20 17:46:13,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:13,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:46:13,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:13,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:46:13,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1580, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 17:46:13,565 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) [2022-03-20 17:46:13,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:13,879 INFO L93 Difference]: Finished difference Result 177 states and 219 transitions. [2022-03-20 17:46:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:46:13,880 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 [2022-03-20 17:46:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:13,881 INFO L225 Difference]: With dead ends: 177 [2022-03-20 17:46:13,881 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 17:46:13,881 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 [2022-03-20 17:46:13,882 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 [2022-03-20 17:46:13,882 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] [2022-03-20 17:46:13,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 17:46:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2022-03-20 17:46:13,903 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) [2022-03-20 17:46:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2022-03-20 17:46:13,904 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 76 [2022-03-20 17:46:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:13,905 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2022-03-20 17:46:13,905 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) [2022-03-20 17:46:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2022-03-20 17:46:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 17:46:13,905 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:13,905 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] [2022-03-20 17:46:13,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:14,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 17:46:14,119 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:14,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:14,120 INFO L85 PathProgramCache]: Analyzing trace with hash 338841578, now seen corresponding path program 35 times [2022-03-20 17:46:14,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:14,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1680883579] [2022-03-20 17:46:14,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:14,120 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash 338841578, now seen corresponding path program 36 times [2022-03-20 17:46:14,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:14,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134244243] [2022-03-20 17:46:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:14,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:14,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:14,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:46:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 17:46:14,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:14,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134244243] [2022-03-20 17:46:14,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134244243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:14,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323574097] [2022-03-20 17:46:14,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:14,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:14,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:14,520 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:14,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 17:46:14,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 17:46:14,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:14,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 17:46:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:14,722 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:46:14,722 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 [2022-03-20 17:46:14,770 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 [2022-03-20 17:46:15,272 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 [2022-03-20 17:46:15,339 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 17:46:15,339 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 [2022-03-20 17:46:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 9 proven. 107 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-20 17:46:15,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:15,493 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 [2022-03-20 17:46:15,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323574097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:15,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:46:15,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-03-20 17:46:15,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:15,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1680883579] [2022-03-20 17:46:15,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1680883579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:15,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:15,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:46:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605412375] [2022-03-20 17:46:15,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:15,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 17:46:15,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:15,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 17:46:15,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=826, Unknown=7, NotChecked=58, Total=992 [2022-03-20 17:46:15,497 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) [2022-03-20 17:46:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:16,307 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2022-03-20 17:46:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 17:46:16,308 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 [2022-03-20 17:46:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:16,308 INFO L225 Difference]: With dead ends: 112 [2022-03-20 17:46:16,308 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 17:46:16,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=403, Invalid=2240, Unknown=13, NotChecked=100, Total=2756 [2022-03-20 17:46:16,309 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 [2022-03-20 17:46:16,310 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] [2022-03-20 17:46:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 17:46:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2022-03-20 17:46:16,330 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) [2022-03-20 17:46:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2022-03-20 17:46:16,331 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 78 [2022-03-20 17:46:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:16,331 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2022-03-20 17:46:16,331 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) [2022-03-20 17:46:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2022-03-20 17:46:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 17:46:16,332 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:16,332 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] [2022-03-20 17:46:16,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:16,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 17:46:16,546 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:16,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1489934626, now seen corresponding path program 1 times [2022-03-20 17:46:16,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:16,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [121911280] [2022-03-20 17:46:16,548 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:16,548 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:16,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1489934626, now seen corresponding path program 2 times [2022-03-20 17:46:16,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:16,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816299403] [2022-03-20 17:46:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:16,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:17,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:46:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:17,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:46:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 134 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 17:46:17,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816299403] [2022-03-20 17:46:17,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816299403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942586869] [2022-03-20 17:46:17,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:17,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:17,076 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:17,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 17:46:17,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:17,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:17,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 17:46:17,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:17,268 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:46:17,269 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 [2022-03-20 17:46:17,365 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 [2022-03-20 17:46:17,433 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:46:17,434 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 [2022-03-20 17:46:17,822 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 [2022-03-20 17:46:18,025 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 17:46:18,026 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 [2022-03-20 17:46:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 17:46:18,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:18,221 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 [2022-03-20 17:46:18,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942586869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:18,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:46:18,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2022-03-20 17:46:18,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:18,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [121911280] [2022-03-20 17:46:18,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [121911280] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:18,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:18,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:46:18,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854070437] [2022-03-20 17:46:18,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:18,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:46:18,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:18,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:46:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1348, Unknown=11, NotChecked=74, Total=1560 [2022-03-20 17:46:18,224 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) [2022-03-20 17:46:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:19,350 INFO L93 Difference]: Finished difference Result 126 states and 150 transitions. [2022-03-20 17:46:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:46:19,351 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 [2022-03-20 17:46:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:19,352 INFO L225 Difference]: With dead ends: 126 [2022-03-20 17:46:19,352 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 17:46:19,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=378, Invalid=3031, Unknown=17, NotChecked=114, Total=3540 [2022-03-20 17:46:19,353 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 [2022-03-20 17:46:19,353 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] [2022-03-20 17:46:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 17:46:19,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 103. [2022-03-20 17:46:19,373 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) [2022-03-20 17:46:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2022-03-20 17:46:19,374 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 86 [2022-03-20 17:46:19,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:19,374 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2022-03-20 17:46:19,374 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) [2022-03-20 17:46:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2022-03-20 17:46:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 17:46:19,375 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:19,375 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] [2022-03-20 17:46:19,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:19,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:19,591 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -34321966, now seen corresponding path program 3 times [2022-03-20 17:46:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:19,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [658070561] [2022-03-20 17:46:19,592 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:19,592 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -34321966, now seen corresponding path program 4 times [2022-03-20 17:46:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:19,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331072772] [2022-03-20 17:46:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:19,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:19,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:19,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:46:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:20,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:46:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:20,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:46:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 125 proven. 61 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 17:46:20,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331072772] [2022-03-20 17:46:20,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331072772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684751670] [2022-03-20 17:46:20,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:20,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:20,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:20,376 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:20,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 17:46:20,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:20,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 17:46:20,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:21,085 INFO L356 Elim1Store]: treesize reduction 274, result has 11.6 percent of original size [2022-03-20 17:46:21,085 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 [2022-03-20 17:46:21,339 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-20 17:46:21,339 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 [2022-03-20 17:46:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 90 proven. 123 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 17:46:21,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:22,288 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 [2022-03-20 17:46:22,374 INFO L356 Elim1Store]: treesize reduction 117, result has 54.3 percent of original size [2022-03-20 17:46:22,374 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 [2022-03-20 17:46:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 169 proven. 26 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 17:46:23,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684751670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:23,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:23,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 16] total 59 [2022-03-20 17:46:23,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:23,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [658070561] [2022-03-20 17:46:23,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [658070561] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:23,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:23,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 17:46:23,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478162436] [2022-03-20 17:46:23,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:23,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 17:46:23,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:23,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 17:46:23,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=3144, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 17:46:23,131 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) [2022-03-20 17:46:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:28,092 INFO L93 Difference]: Finished difference Result 410 states and 529 transitions. [2022-03-20 17:46:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 17:46:28,092 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 [2022-03-20 17:46:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:28,095 INFO L225 Difference]: With dead ends: 410 [2022-03-20 17:46:28,095 INFO L226 Difference]: Without dead ends: 350 [2022-03-20 17:46:28,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3940 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1711, Invalid=13541, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 17:46:28,099 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 [2022-03-20 17:46:28,099 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] [2022-03-20 17:46:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-03-20 17:46:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 233. [2022-03-20 17:46:28,177 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) [2022-03-20 17:46:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 313 transitions. [2022-03-20 17:46:28,178 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 313 transitions. Word has length 94 [2022-03-20 17:46:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:28,178 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 313 transitions. [2022-03-20 17:46:28,179 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) [2022-03-20 17:46:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 313 transitions. [2022-03-20 17:46:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 17:46:28,180 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:28,180 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] [2022-03-20 17:46:28,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 17:46:28,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:28,384 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2062908076, now seen corresponding path program 1 times [2022-03-20 17:46:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:28,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [377477479] [2022-03-20 17:46:28,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:28,385 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:28,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2062908076, now seen corresponding path program 2 times [2022-03-20 17:46:28,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:28,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562458379] [2022-03-20 17:46:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:28,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:28,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:28,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:46:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:29,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:46:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:29,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:46:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 86 proven. 136 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-20 17:46:29,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:29,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562458379] [2022-03-20 17:46:29,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562458379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:29,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405648340] [2022-03-20 17:46:29,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:29,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:29,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:29,532 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:29,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 17:46:29,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:29,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:29,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 17:46:29,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:29,713 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:46:29,715 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 [2022-03-20 17:46:29,841 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 [2022-03-20 17:46:29,940 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:46:29,940 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 [2022-03-20 17:46:29,998 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:46:29,998 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 [2022-03-20 17:46:30,426 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 [2022-03-20 17:46:30,819 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 17:46:30,820 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 [2022-03-20 17:46:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-03-20 17:46:30,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:31,135 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 [2022-03-20 17:46:31,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405648340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:31,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:46:31,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 20] total 52 [2022-03-20 17:46:31,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [377477479] [2022-03-20 17:46:31,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [377477479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:31,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:31,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 17:46:31,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848525367] [2022-03-20 17:46:31,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:31,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 17:46:31,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 17:46:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2957, Unknown=10, NotChecked=110, Total=3306 [2022-03-20 17:46:31,141 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) [2022-03-20 17:46:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:38,296 INFO L93 Difference]: Finished difference Result 762 states and 1052 transitions. [2022-03-20 17:46:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 17:46:38,296 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 [2022-03-20 17:46:38,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:38,299 INFO L225 Difference]: With dead ends: 762 [2022-03-20 17:46:38,299 INFO L226 Difference]: Without dead ends: 701 [2022-03-20 17:46:38,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 93 SyntacticMatches, 8 SemanticMatches, 145 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2620, Invalid=18543, Unknown=11, NotChecked=288, Total=21462 [2022-03-20 17:46:38,304 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 [2022-03-20 17:46:38,305 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] [2022-03-20 17:46:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-20 17:46:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 465. [2022-03-20 17:46:38,512 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) [2022-03-20 17:46:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 642 transitions. [2022-03-20 17:46:38,514 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 642 transitions. Word has length 94 [2022-03-20 17:46:38,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:38,515 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 642 transitions. [2022-03-20 17:46:38,515 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) [2022-03-20 17:46:38,515 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 642 transitions. [2022-03-20 17:46:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 17:46:38,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:38,516 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] [2022-03-20 17:46:38,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:38,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 17:46:38,731 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:38,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:38,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1639261354, now seen corresponding path program 3 times [2022-03-20 17:46:38,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:38,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1092219687] [2022-03-20 17:46:38,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:38,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:38,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1639261354, now seen corresponding path program 4 times [2022-03-20 17:46:38,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:38,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435457472] [2022-03-20 17:46:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:38,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:39,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:39,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:46:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:39,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:46:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:39,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:46:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 17:46:39,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:39,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435457472] [2022-03-20 17:46:39,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435457472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:39,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046888749] [2022-03-20 17:46:39,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:39,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:39,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:39,288 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:39,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 17:46:39,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:39,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:39,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 17:46:39,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:39,738 INFO L356 Elim1Store]: treesize reduction 147, result has 14.0 percent of original size [2022-03-20 17:46:39,739 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 [2022-03-20 17:46:39,821 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-20 17:46:39,822 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 [2022-03-20 17:46:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 108 proven. 92 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-20 17:46:39,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:42,395 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 [2022-03-20 17:46:42,463 INFO L356 Elim1Store]: treesize reduction 81, result has 52.1 percent of original size [2022-03-20 17:46:42,464 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 [2022-03-20 17:46:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 170 proven. 16 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 17:46:42,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046888749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:42,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:42,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 11] total 43 [2022-03-20 17:46:42,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:42,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1092219687] [2022-03-20 17:46:42,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1092219687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:42,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:42,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 17:46:42,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195118571] [2022-03-20 17:46:42,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:42,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 17:46:42,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:42,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 17:46:42,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1686, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 17:46:42,965 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) [2022-03-20 17:46:44,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:44,301 INFO L93 Difference]: Finished difference Result 490 states and 670 transitions. [2022-03-20 17:46:44,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:46:44,302 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 [2022-03-20 17:46:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:44,304 INFO L225 Difference]: With dead ends: 490 [2022-03-20 17:46:44,304 INFO L226 Difference]: Without dead ends: 488 [2022-03-20 17:46:44,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=308, Invalid=3598, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 17:46:44,305 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 [2022-03-20 17:46:44,306 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] [2022-03-20 17:46:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-03-20 17:46:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 473. [2022-03-20 17:46:44,506 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) [2022-03-20 17:46:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 650 transitions. [2022-03-20 17:46:44,508 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 650 transitions. Word has length 94 [2022-03-20 17:46:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:44,508 INFO L478 AbstractCegarLoop]: Abstraction has 473 states and 650 transitions. [2022-03-20 17:46:44,509 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) [2022-03-20 17:46:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 650 transitions. [2022-03-20 17:46:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:46:44,510 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:44,510 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] [2022-03-20 17:46:44,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:44,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 17:46:44,723 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:44,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:44,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1315817034, now seen corresponding path program 5 times [2022-03-20 17:46:44,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:44,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796318994] [2022-03-20 17:46:44,725 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:44,725 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:44,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1315817034, now seen corresponding path program 6 times [2022-03-20 17:46:44,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:44,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257321005] [2022-03-20 17:46:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:44,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:44,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:44,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:46:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:45,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:46:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:45,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:46:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:45,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:46:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 17:46:45,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:45,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257321005] [2022-03-20 17:46:45,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257321005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:45,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356834765] [2022-03-20 17:46:45,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:45,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:45,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:45,241 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:45,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 17:46:45,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-20 17:46:45,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:45,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 17:46:45,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:45,592 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:46:45,592 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 [2022-03-20 17:46:45,650 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 [2022-03-20 17:46:45,716 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:46:45,716 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 [2022-03-20 17:46:45,760 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 17:46:45,760 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 [2022-03-20 17:46:45,837 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 17:46:45,837 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 [2022-03-20 17:46:46,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-20 17:46:46,765 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 17:46:46,766 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 [2022-03-20 17:46:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-20 17:46:46,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:47,085 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 [2022-03-20 17:46:47,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356834765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:47,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:46:47,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 17:46:47,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:47,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796318994] [2022-03-20 17:46:47,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796318994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:47,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:47,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 17:46:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878404821] [2022-03-20 17:46:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:47,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 17:46:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 17:46:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2090, Unknown=11, NotChecked=92, Total=2352 [2022-03-20 17:46:47,088 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) [2022-03-20 17:46:50,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:50,204 INFO L93 Difference]: Finished difference Result 1370 states and 1890 transitions. [2022-03-20 17:46:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 17:46:50,204 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 [2022-03-20 17:46:50,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:50,208 INFO L225 Difference]: With dead ends: 1370 [2022-03-20 17:46:50,208 INFO L226 Difference]: Without dead ends: 1021 [2022-03-20 17:46:50,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 122 SyntacticMatches, 11 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=725, Invalid=8968, Unknown=13, NotChecked=194, Total=9900 [2022-03-20 17:46:50,210 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 280 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:50,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 49 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:46:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-03-20 17:46:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 610. [2022-03-20 17:46:50,511 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) [2022-03-20 17:46:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 830 transitions. [2022-03-20 17:46:50,513 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 830 transitions. Word has length 102 [2022-03-20 17:46:50,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:50,513 INFO L478 AbstractCegarLoop]: Abstraction has 610 states and 830 transitions. [2022-03-20 17:46:50,513 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) [2022-03-20 17:46:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 830 transitions. [2022-03-20 17:46:50,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:46:50,514 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:50,514 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] [2022-03-20 17:46:50,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:50,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 17:46:50,715 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:50,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1425291514, now seen corresponding path program 7 times [2022-03-20 17:46:50,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:50,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082125595] [2022-03-20 17:46:50,716 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:50,716 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1425291514, now seen corresponding path program 8 times [2022-03-20 17:46:50,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:50,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81570845] [2022-03-20 17:46:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:50,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:51,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:51,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:46:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:51,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:46:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:51,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:46:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:46:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-20 17:46:51,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:51,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81570845] [2022-03-20 17:46:51,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81570845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:51,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781984746] [2022-03-20 17:46:51,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:51,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:51,320 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:51,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 17:46:51,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:51,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:51,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 17:46:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:51,508 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:46:51,509 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 [2022-03-20 17:46:51,557 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 [2022-03-20 17:46:51,638 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:46:51,638 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 [2022-03-20 17:46:51,688 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:46:51,688 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 [2022-03-20 17:46:51,748 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:46:51,748 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 [2022-03-20 17:46:52,140 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 [2022-03-20 17:46:52,580 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 17:46:52,580 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 [2022-03-20 17:46:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 4 proven. 152 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-20 17:46:52,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:52,842 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 [2022-03-20 17:46:52,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781984746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:52,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:46:52,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2022-03-20 17:46:52,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:52,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2082125595] [2022-03-20 17:46:52,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2082125595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:52,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:52,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 17:46:52,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030147571] [2022-03-20 17:46:52,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:52,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 17:46:52,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:52,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 17:46:52,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1802, Unknown=11, NotChecked=86, Total=2070 [2022-03-20 17:46:52,845 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) [2022-03-20 17:46:54,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:54,177 INFO L93 Difference]: Finished difference Result 631 states and 853 transitions. [2022-03-20 17:46:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 17:46:54,177 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 [2022-03-20 17:46:54,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:54,180 INFO L225 Difference]: With dead ends: 631 [2022-03-20 17:46:54,180 INFO L226 Difference]: Without dead ends: 629 [2022-03-20 17:46:54,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 113 SyntacticMatches, 12 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=435, Invalid=3584, Unknown=17, NotChecked=124, Total=4160 [2022-03-20 17:46:54,181 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:54,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 42 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:46:54,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-03-20 17:46:54,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 618. [2022-03-20 17:46:54,507 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) [2022-03-20 17:46:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 838 transitions. [2022-03-20 17:46:54,508 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 838 transitions. Word has length 102 [2022-03-20 17:46:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:54,508 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 838 transitions. [2022-03-20 17:46:54,508 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) [2022-03-20 17:46:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 838 transitions. [2022-03-20 17:46:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:46:54,510 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:54,510 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] [2022-03-20 17:46:54,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 17:46:54,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 17:46:54,719 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1545601530, now seen corresponding path program 9 times [2022-03-20 17:46:54,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:54,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1451224561] [2022-03-20 17:46:54,720 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:54,721 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:54,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1545601530, now seen corresponding path program 10 times [2022-03-20 17:46:54,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:54,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506622906] [2022-03-20 17:46:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:54,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:54,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:54,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:46:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:55,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:46:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:55,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:46:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:55,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:46:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:55,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:46:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 126 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-20 17:46:55,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:55,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506622906] [2022-03-20 17:46:55,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506622906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:55,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978419118] [2022-03-20 17:46:55,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:55,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:55,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:55,174 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:55,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 17:46:55,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:55,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:55,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 17:46:55,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:55,590 INFO L356 Elim1Store]: treesize reduction 147, result has 14.0 percent of original size [2022-03-20 17:46:55,590 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 [2022-03-20 17:46:55,780 INFO L356 Elim1Store]: treesize reduction 147, result has 14.0 percent of original size [2022-03-20 17:46:55,781 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 [2022-03-20 17:46:56,016 INFO L356 Elim1Store]: treesize reduction 273, result has 8.1 percent of original size [2022-03-20 17:46:56,017 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 [2022-03-20 17:46:56,103 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-20 17:46:56,103 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 [2022-03-20 17:46:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 55 proven. 169 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 17:46:56,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:57,760 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 [2022-03-20 17:46:57,833 INFO L356 Elim1Store]: treesize reduction 140, result has 45.3 percent of original size [2022-03-20 17:46:57,833 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 [2022-03-20 17:46:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 74 proven. 158 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-20 17:46:59,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978419118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:59,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:59,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 24] total 60 [2022-03-20 17:46:59,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:59,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1451224561] [2022-03-20 17:46:59,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1451224561] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:59,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:59,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:46:59,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425767061] [2022-03-20 17:46:59,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:59,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:46:59,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:59,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:46:59,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3300, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 17:46:59,286 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) [2022-03-20 17:47:00,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:00,145 INFO L93 Difference]: Finished difference Result 1142 states and 1560 transitions. [2022-03-20 17:47:00,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:47:00,145 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 [2022-03-20 17:47:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:00,147 INFO L225 Difference]: With dead ends: 1142 [2022-03-20 17:47:00,147 INFO L226 Difference]: Without dead ends: 563 [2022-03-20 17:47:00,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=380, Invalid=4450, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 17:47:00,149 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 [2022-03-20 17:47:00,149 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] [2022-03-20 17:47:00,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-03-20 17:47:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-03-20 17:47:00,425 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) [2022-03-20 17:47:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 767 transitions. [2022-03-20 17:47:00,427 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 767 transitions. Word has length 110 [2022-03-20 17:47:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:00,427 INFO L478 AbstractCegarLoop]: Abstraction has 563 states and 767 transitions. [2022-03-20 17:47:00,427 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) [2022-03-20 17:47:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 767 transitions. [2022-03-20 17:47:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:47:00,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:00,429 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] [2022-03-20 17:47:00,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:00,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:00,643 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:00,643 INFO L85 PathProgramCache]: Analyzing trace with hash 120276278, now seen corresponding path program 11 times [2022-03-20 17:47:00,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:00,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2017016765] [2022-03-20 17:47:00,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:00,644 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash 120276278, now seen corresponding path program 12 times [2022-03-20 17:47:00,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:00,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817455659] [2022-03-20 17:47:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:00,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:00,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:00,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:01,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:47:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:01,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:47:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:01,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:47:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:01,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:47:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 129 proven. 61 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-03-20 17:47:01,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:01,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817455659] [2022-03-20 17:47:01,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817455659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:01,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694483273] [2022-03-20 17:47:01,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:47:01,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:01,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:01,440 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:01,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 17:47:01,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 17:47:01,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 17:47:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:02,441 INFO L356 Elim1Store]: treesize reduction 99, result has 22.0 percent of original size [2022-03-20 17:47:02,441 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 [2022-03-20 17:47:02,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:47:02,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:02,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:02,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:47:02,836 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:47:02,837 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 [2022-03-20 17:47:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 118 proven. 71 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-20 17:47:02,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:03,197 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 79 treesize of output 65 [2022-03-20 17:47:03,249 INFO L356 Elim1Store]: treesize reduction 76, result has 41.1 percent of original size [2022-03-20 17:47:03,250 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 401 treesize of output 399 [2022-03-20 17:47:06,193 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 [2022-03-20 17:47:06,286 INFO L356 Elim1Store]: treesize reduction 109, result has 56.6 percent of original size [2022-03-20 17:47:06,286 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 1113 treesize of output 1112 [2022-03-20 17:47:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 113 proven. 92 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-20 17:47:08,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694483273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:08,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:08,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 25] total 69 [2022-03-20 17:47:08,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:08,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2017016765] [2022-03-20 17:47:08,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2017016765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:08,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:08,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 17:47:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674057490] [2022-03-20 17:47:08,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:08,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 17:47:08,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:08,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 17:47:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=4284, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 17:47:08,122 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) [2022-03-20 17:47:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:13,837 INFO L93 Difference]: Finished difference Result 1276 states and 1722 transitions. [2022-03-20 17:47:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 17:47:13,837 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 [2022-03-20 17:47:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:13,839 INFO L225 Difference]: With dead ends: 1276 [2022-03-20 17:47:13,839 INFO L226 Difference]: Without dead ends: 954 [2022-03-20 17:47:13,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5575 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1857, Invalid=17049, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 17:47:13,842 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:13,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 36 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:47:13,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-03-20 17:47:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 611. [2022-03-20 17:47:14,186 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) [2022-03-20 17:47:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 831 transitions. [2022-03-20 17:47:14,188 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 831 transitions. Word has length 110 [2022-03-20 17:47:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:14,188 INFO L478 AbstractCegarLoop]: Abstraction has 611 states and 831 transitions. [2022-03-20 17:47:14,189 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) [2022-03-20 17:47:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 831 transitions. [2022-03-20 17:47:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:47:14,190 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:14,190 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] [2022-03-20 17:47:14,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:14,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:14,403 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash -412973256, now seen corresponding path program 13 times [2022-03-20 17:47:14,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:14,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [859387085] [2022-03-20 17:47:14,404 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:14,405 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:14,405 INFO L85 PathProgramCache]: Analyzing trace with hash -412973256, now seen corresponding path program 14 times [2022-03-20 17:47:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:14,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560990315] [2022-03-20 17:47:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:14,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:14,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:14,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:14,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:47:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:14,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:47:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:47:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:14,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:47:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 134 proven. 53 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 17:47:14,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:14,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560990315] [2022-03-20 17:47:14,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560990315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:14,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922026010] [2022-03-20 17:47:14,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:47:14,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:14,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:14,934 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:14,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 17:47:15,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:47:15,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:15,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 17:47:15,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:15,132 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:47:15,132 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 [2022-03-20 17:47:15,154 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 [2022-03-20 17:47:15,217 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:47:15,218 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 [2022-03-20 17:47:15,257 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:47:15,257 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 [2022-03-20 17:47:15,302 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:47:15,303 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 [2022-03-20 17:47:15,356 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:47:15,357 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 [2022-03-20 17:47:15,714 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 [2022-03-20 17:47:16,258 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 17:47:16,258 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 [2022-03-20 17:47:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 9 proven. 163 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-20 17:47:16,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:16,599 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 [2022-03-20 17:47:16,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922026010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:16,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:47:16,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 17:47:16,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:16,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [859387085] [2022-03-20 17:47:16,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [859387085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:16,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:16,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 17:47:16,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166969111] [2022-03-20 17:47:16,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:16,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 17:47:16,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:16,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 17:47:16,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2149, Unknown=10, NotChecked=94, Total=2450 [2022-03-20 17:47:16,602 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) [2022-03-20 17:47:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:19,784 INFO L93 Difference]: Finished difference Result 1355 states and 1832 transitions. [2022-03-20 17:47:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 17:47:19,784 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 [2022-03-20 17:47:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:19,786 INFO L225 Difference]: With dead ends: 1355 [2022-03-20 17:47:19,786 INFO L226 Difference]: Without dead ends: 973 [2022-03-20 17:47:19,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 122 SyntacticMatches, 12 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1312, Invalid=9188, Unknown=10, NotChecked=202, Total=10712 [2022-03-20 17:47:19,788 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 [2022-03-20 17:47:19,789 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] [2022-03-20 17:47:19,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-03-20 17:47:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 824. [2022-03-20 17:47:20,351 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) [2022-03-20 17:47:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1123 transitions. [2022-03-20 17:47:20,353 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1123 transitions. Word has length 110 [2022-03-20 17:47:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:20,353 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 1123 transitions. [2022-03-20 17:47:20,353 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) [2022-03-20 17:47:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1123 transitions. [2022-03-20 17:47:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:47:20,355 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:20,355 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] [2022-03-20 17:47:20,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:20,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-20 17:47:20,567 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1264922498, now seen corresponding path program 15 times [2022-03-20 17:47:20,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:20,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [656093912] [2022-03-20 17:47:20,569 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:20,569 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:20,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1264922498, now seen corresponding path program 16 times [2022-03-20 17:47:20,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:20,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478040741] [2022-03-20 17:47:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:20,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:20,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:20,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:21,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:47:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:21,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:47:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:21,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:47:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:21,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:47:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 153 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-03-20 17:47:21,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:21,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478040741] [2022-03-20 17:47:21,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478040741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:21,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794251619] [2022-03-20 17:47:21,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:47:21,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:21,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:21,432 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:21,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 17:47:21,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:47:21,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:21,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 17:47:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:21,654 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:47:21,655 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 [2022-03-20 17:47:21,678 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 [2022-03-20 17:47:21,740 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 17:47:21,740 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 [2022-03-20 17:47:21,783 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 17:47:21,783 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 [2022-03-20 17:47:21,825 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 17:47:21,826 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 [2022-03-20 17:47:21,877 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 17:47:21,878 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 30 treesize of output 29 [2022-03-20 17:47:22,428 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 [2022-03-20 17:47:23,522 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-03-20 17:47:23,523 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 [2022-03-20 17:47:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 5 proven. 167 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-20 17:47:23,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:23,955 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 [2022-03-20 17:47:23,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794251619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:23,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:47:23,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2022-03-20 17:47:23,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:23,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [656093912] [2022-03-20 17:47:23,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [656093912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:23,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:23,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 17:47:23,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596959146] [2022-03-20 17:47:23,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:23,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 17:47:23,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:23,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 17:47:23,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2475, Unknown=13, NotChecked=100, Total=2756 [2022-03-20 17:47:23,957 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) [2022-03-20 17:47:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:25,648 INFO L93 Difference]: Finished difference Result 1560 states and 2143 transitions. [2022-03-20 17:47:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:47:25,648 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 [2022-03-20 17:47:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:25,650 INFO L225 Difference]: With dead ends: 1560 [2022-03-20 17:47:25,650 INFO L226 Difference]: Without dead ends: 803 [2022-03-20 17:47:25,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 123 SyntacticMatches, 13 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=383, Invalid=4547, Unknown=44, NotChecked=138, Total=5112 [2022-03-20 17:47:25,653 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 [2022-03-20 17:47:25,653 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] [2022-03-20 17:47:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-03-20 17:47:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 799. [2022-03-20 17:47:26,232 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) [2022-03-20 17:47:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1093 transitions. [2022-03-20 17:47:26,234 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1093 transitions. Word has length 110 [2022-03-20 17:47:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:26,234 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1093 transitions. [2022-03-20 17:47:26,235 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) [2022-03-20 17:47:26,235 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1093 transitions. [2022-03-20 17:47:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:47:26,236 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:26,236 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] [2022-03-20 17:47:26,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:26,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:26,451 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1022226188, now seen corresponding path program 17 times [2022-03-20 17:47:26,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:26,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235001551] [2022-03-20 17:47:26,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:26,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:26,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1022226188, now seen corresponding path program 18 times [2022-03-20 17:47:26,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:26,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568474588] [2022-03-20 17:47:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:26,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:47:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:47:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:47:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:47:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 130 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 17:47:26,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:26,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568474588] [2022-03-20 17:47:26,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568474588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:26,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423244082] [2022-03-20 17:47:26,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:47:26,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:26,940 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:26,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 17:47:27,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 17:47:27,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 17:47:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:27,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:27,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:27,645 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:47:27,645 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 [2022-03-20 17:47:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:27,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:47:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:47:27,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:47:27,992 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 [2022-03-20 17:47:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 131 proven. 39 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-20 17:47:28,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:28,316 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 95 treesize of output 81 [2022-03-20 17:47:28,323 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-20 17:47:28,323 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 753 treesize of output 681 [2022-03-20 17:47:39,942 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 [2022-03-20 17:47:40,040 INFO L356 Elim1Store]: treesize reduction 140, result has 45.3 percent of original size [2022-03-20 17:47:40,041 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 2041 treesize of output 1914 [2022-03-20 17:47:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 134 proven. 39 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-03-20 17:47:48,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423244082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:48,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:48,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 57 [2022-03-20 17:47:48,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:48,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235001551] [2022-03-20 17:47:48,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235001551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:48,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:48,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 17:47:48,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013764771] [2022-03-20 17:47:48,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:48,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 17:47:48,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 17:47:48,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2847, Unknown=12, NotChecked=0, Total=3192 [2022-03-20 17:47:48,319 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) [2022-03-20 17:47:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:51,046 INFO L93 Difference]: Finished difference Result 1903 states and 2629 transitions. [2022-03-20 17:47:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 17:47:51,046 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 [2022-03-20 17:47:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:51,049 INFO L225 Difference]: With dead ends: 1903 [2022-03-20 17:47:51,049 INFO L226 Difference]: Without dead ends: 1228 [2022-03-20 17:47:51,050 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=720, Invalid=7100, Unknown=12, NotChecked=0, Total=7832 [2022-03-20 17:47:51,051 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 [2022-03-20 17:47:51,051 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] [2022-03-20 17:47:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-03-20 17:47:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 927. [2022-03-20 17:47:51,636 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) [2022-03-20 17:47:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1261 transitions. [2022-03-20 17:47:51,638 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1261 transitions. Word has length 110 [2022-03-20 17:47:51,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:51,638 INFO L478 AbstractCegarLoop]: Abstraction has 927 states and 1261 transitions. [2022-03-20 17:47:51,638 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) [2022-03-20 17:47:51,638 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1261 transitions. [2022-03-20 17:47:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:47:51,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:51,640 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] [2022-03-20 17:47:51,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:51,862 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:51,862 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:51,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:51,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1666738186, now seen corresponding path program 19 times [2022-03-20 17:47:51,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:51,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693820799] [2022-03-20 17:47:51,864 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:51,864 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1666738186, now seen corresponding path program 20 times [2022-03-20 17:47:51,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:51,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372070879] [2022-03-20 17:47:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:51,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:51,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:51,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:52,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:47:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:52,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:47:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:52,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:47:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:52,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:47:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 128 proven. 29 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-03-20 17:47:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372070879] [2022-03-20 17:47:52,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372070879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150715907] [2022-03-20 17:47:52,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:47:52,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:52,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:52,200 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:52,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 17:47:52,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:47:52,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:52,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 17:47:52,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:52,378 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:47:52,378 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 [2022-03-20 17:47:52,400 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 [2022-03-20 17:47:52,460 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:47:52,460 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 [2022-03-20 17:47:52,499 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:47:52,499 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 [2022-03-20 17:47:52,543 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:47:52,543 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 [2022-03-20 17:47:52,587 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:47:52,587 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 [2022-03-20 17:47:52,966 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 [2022-03-20 17:47:53,508 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 17:47:53,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-20 17:47:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 9 proven. 163 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-20 17:47:53,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:53,847 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 [2022-03-20 17:47:53,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150715907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:53,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:47:53,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 36 [2022-03-20 17:47:53,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:53,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693820799] [2022-03-20 17:47:53,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693820799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:53,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:53,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:47:53,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049305896] [2022-03-20 17:47:53,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:53,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:47:53,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:47:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1654, Unknown=10, NotChecked=82, Total=1892 [2022-03-20 17:47:53,849 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) [2022-03-20 17:47:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:55,933 INFO L93 Difference]: Finished difference Result 2266 states and 3111 transitions. [2022-03-20 17:47:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 17:47:55,933 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 [2022-03-20 17:47:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:55,936 INFO L225 Difference]: With dead ends: 2266 [2022-03-20 17:47:55,936 INFO L226 Difference]: Without dead ends: 1430 [2022-03-20 17:47:55,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 122 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=424, Invalid=4400, Unknown=10, NotChecked=136, Total=4970 [2022-03-20 17:47:55,938 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-20 17:47:55,938 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] [2022-03-20 17:47:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-03-20 17:47:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1016. [2022-03-20 17:47:56,676 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) [2022-03-20 17:47:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1399 transitions. [2022-03-20 17:47:56,677 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1399 transitions. Word has length 110 [2022-03-20 17:47:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:56,678 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1399 transitions. [2022-03-20 17:47:56,678 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) [2022-03-20 17:47:56,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1399 transitions. [2022-03-20 17:47:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:47:56,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:56,680 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] [2022-03-20 17:47:56,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:56,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 17:47:56,899 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1361698550, now seen corresponding path program 21 times [2022-03-20 17:47:56,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:56,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813654619] [2022-03-20 17:47:56,900 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:56,900 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1361698550, now seen corresponding path program 22 times [2022-03-20 17:47:56,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:56,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606610030] [2022-03-20 17:47:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:56,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:56,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:56,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:57,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:47:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:57,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:47:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:57,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:47:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:57,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:47:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 130 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 17:47:57,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606610030] [2022-03-20 17:47:57,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606610030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620598520] [2022-03-20 17:47:57,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:47:57,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:57,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:57,336 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:57,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 17:47:57,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:47:57,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:57,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 17:47:57,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:57,659 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-20 17:47:57,659 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 [2022-03-20 17:47:57,915 INFO L356 Elim1Store]: treesize reduction 147, result has 14.0 percent of original size [2022-03-20 17:47:57,915 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 [2022-03-20 17:47:58,083 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-20 17:47:58,083 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 [2022-03-20 17:47:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 90 proven. 123 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-20 17:47:58,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 171 proven. 28 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 17:48:02,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620598520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:48:02,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:48:02,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 14] total 50 [2022-03-20 17:48:02,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813654619] [2022-03-20 17:48:02,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813654619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:02,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:02,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 17:48:02,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276924176] [2022-03-20 17:48:02,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:02,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 17:48:02,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:02,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 17:48:02,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2289, Unknown=1, NotChecked=0, Total=2450 [2022-03-20 17:48:02,949 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) [2022-03-20 17:48:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:05,909 INFO L93 Difference]: Finished difference Result 2132 states and 2958 transitions. [2022-03-20 17:48:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 17:48:05,910 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 [2022-03-20 17:48:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:05,913 INFO L225 Difference]: With dead ends: 2132 [2022-03-20 17:48:05,913 INFO L226 Difference]: Without dead ends: 1431 [2022-03-20 17:48:05,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1573 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=548, Invalid=6591, Unknown=1, NotChecked=0, Total=7140 [2022-03-20 17:48:05,914 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 121 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-03-20 17:48:05,914 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] [2022-03-20 17:48:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2022-03-20 17:48:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1146. [2022-03-20 17:48:06,737 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) [2022-03-20 17:48:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1558 transitions. [2022-03-20 17:48:06,739 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1558 transitions. Word has length 110 [2022-03-20 17:48:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:06,740 INFO L478 AbstractCegarLoop]: Abstraction has 1146 states and 1558 transitions. [2022-03-20 17:48:06,740 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) [2022-03-20 17:48:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1558 transitions. [2022-03-20 17:48:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:48:06,741 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:06,742 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] [2022-03-20 17:48:06,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 17:48:06,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 17:48:06,963 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:06,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1024810956, now seen corresponding path program 23 times [2022-03-20 17:48:06,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:06,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1422236452] [2022-03-20 17:48:06,964 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:06,964 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1024810956, now seen corresponding path program 24 times [2022-03-20 17:48:06,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:06,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361682682] [2022-03-20 17:48:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:07,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:07,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:48:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:08,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:48:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:08,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:48:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:08,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:48:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:08,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:48:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 47 proven. 179 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-20 17:48:08,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:08,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361682682] [2022-03-20 17:48:08,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361682682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:08,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720454981] [2022-03-20 17:48:08,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:48:08,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:08,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:08,277 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:08,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 17:48:08,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-20 17:48:08,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 17:48:08,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:08,662 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:48:08,663 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 [2022-03-20 17:48:08,693 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 [2022-03-20 17:48:08,768 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:48:08,768 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 [2022-03-20 17:48:08,819 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:48:08,819 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 [2022-03-20 17:48:08,865 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 17:48:08,865 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 [2022-03-20 17:48:08,955 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 17:48:08,955 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 [2022-03-20 17:48:09,423 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 [2022-03-20 17:48:10,074 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 17:48:10,074 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 [2022-03-20 17:48:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 1 proven. 171 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-20 17:48:10,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:10,496 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 [2022-03-20 17:48:10,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720454981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:10,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:48:10,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 23] total 55 [2022-03-20 17:48:10,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:10,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1422236452] [2022-03-20 17:48:10,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1422236452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:10,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:10,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 17:48:10,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024455330] [2022-03-20 17:48:10,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:10,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 17:48:10,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:10,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 17:48:10,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3526, Unknown=12, NotChecked=120, Total=3906 [2022-03-20 17:48:10,499 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) [2022-03-20 17:48:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:25,084 INFO L93 Difference]: Finished difference Result 3247 states and 4448 transitions. [2022-03-20 17:48:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 17:48:25,085 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 [2022-03-20 17:48:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:25,090 INFO L225 Difference]: With dead ends: 3247 [2022-03-20 17:48:25,090 INFO L226 Difference]: Without dead ends: 2448 [2022-03-20 17:48:25,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 124 SyntacticMatches, 13 SemanticMatches, 159 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8437 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=2493, Invalid=22881, Unknown=70, NotChecked=316, Total=25760 [2022-03-20 17:48:25,093 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 314 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-03-20 17:48:25,093 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] [2022-03-20 17:48:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2022-03-20 17:48:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2216. [2022-03-20 17:48:26,754 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) [2022-03-20 17:48:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 3039 transitions. [2022-03-20 17:48:26,758 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 3039 transitions. Word has length 110 [2022-03-20 17:48:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:26,759 INFO L478 AbstractCegarLoop]: Abstraction has 2216 states and 3039 transitions. [2022-03-20 17:48:26,759 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) [2022-03-20 17:48:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 3039 transitions. [2022-03-20 17:48:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:48:26,761 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:26,762 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] [2022-03-20 17:48:26,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 17:48:26,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 17:48:26,962 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2054002614, now seen corresponding path program 25 times [2022-03-20 17:48:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:26,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [918714262] [2022-03-20 17:48:26,963 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:26,963 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:26,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2054002614, now seen corresponding path program 26 times [2022-03-20 17:48:26,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:26,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704010778] [2022-03-20 17:48:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:26,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:27,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:27,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:48:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:28,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:48:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:28,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:48:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:28,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:48:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:28,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:48:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 23 proven. 203 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-20 17:48:28,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704010778] [2022-03-20 17:48:28,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704010778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820714899] [2022-03-20 17:48:28,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:48:28,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:28,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:28,567 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:28,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 17:48:28,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:48:28,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:28,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 17:48:28,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:28,774 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:48:28,774 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 [2022-03-20 17:48:28,808 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 [2022-03-20 17:48:28,896 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:48:28,896 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 [2022-03-20 17:48:28,960 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:48:28,960 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 [2022-03-20 17:48:29,022 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:48:29,022 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 [2022-03-20 17:48:29,083 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 17:48:29,083 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 [2022-03-20 17:48:29,549 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 [2022-03-20 17:48:30,306 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 17:48:30,307 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 [2022-03-20 17:48:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 9 proven. 163 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-20 17:48:30,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:30,804 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 [2022-03-20 17:48:30,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820714899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:30,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:48:30,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 22] total 56 [2022-03-20 17:48:30,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:30,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [918714262] [2022-03-20 17:48:30,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [918714262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:30,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:30,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 17:48:30,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760957490] [2022-03-20 17:48:30,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:30,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 17:48:30,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:30,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 17:48:30,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3669, Unknown=11, NotChecked=122, Total=4032 [2022-03-20 17:48:30,807 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) [2022-03-20 17:48:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:43,828 INFO L93 Difference]: Finished difference Result 3068 states and 4214 transitions. [2022-03-20 17:48:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 17:48:43,828 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 [2022-03-20 17:48:43,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:43,834 INFO L225 Difference]: With dead ends: 3068 [2022-03-20 17:48:43,835 INFO L226 Difference]: Without dead ends: 2901 [2022-03-20 17:48:43,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 124 SyntacticMatches, 13 SemanticMatches, 143 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=2026, Invalid=18529, Unknown=41, NotChecked=284, Total=20880 [2022-03-20 17:48:43,836 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 201 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:43,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 33 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 17:48:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2022-03-20 17:48:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2224. [2022-03-20 17:48:45,738 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) [2022-03-20 17:48:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3044 transitions. [2022-03-20 17:48:45,740 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3044 transitions. Word has length 110 [2022-03-20 17:48:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:45,740 INFO L478 AbstractCegarLoop]: Abstraction has 2224 states and 3044 transitions. [2022-03-20 17:48:45,741 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) [2022-03-20 17:48:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3044 transitions. [2022-03-20 17:48:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:48:45,743 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:45,743 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] [2022-03-20 17:48:45,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 17:48:45,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:45,944 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash -498967174, now seen corresponding path program 27 times [2022-03-20 17:48:45,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:45,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1862978628] [2022-03-20 17:48:45,945 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:45,945 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash -498967174, now seen corresponding path program 28 times [2022-03-20 17:48:45,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:45,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948393991] [2022-03-20 17:48:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:45,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:46,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:46,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:48:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:46,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:48:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:48:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:46,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:48:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:46,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:48:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 168 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-03-20 17:48:46,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:46,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948393991] [2022-03-20 17:48:46,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948393991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:46,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575503400] [2022-03-20 17:48:46,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:48:46,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:46,593 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:46,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 17:48:46,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:48:46,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:46,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 17:48:46,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:46,833 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 [2022-03-20 17:48:46,893 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 17:48:46,893 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 [2022-03-20 17:48:46,933 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 17:48:46,933 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 [2022-03-20 17:48:46,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:48:46,967 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 [2022-03-20 17:48:47,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:48:47,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:48:47,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:48:47,041 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:48:47,041 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 [2022-03-20 17:48:48,042 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-03-20 17:48:48,043 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 [2022-03-20 17:48:49,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:48:49,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:48:49,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:48:49,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:48:49,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:48:49,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:48:49,281 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:48:49,282 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 [2022-03-20 17:48:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 5 proven. 257 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-03-20 17:48:49,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:49,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575503400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:49,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:48:49,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 34] total 55 [2022-03-20 17:48:49,740 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:49,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1862978628] [2022-03-20 17:48:49,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1862978628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:49,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:49,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 17:48:49,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217212676] [2022-03-20 17:48:49,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:49,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 17:48:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 17:48:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=3480, Unknown=11, NotChecked=0, Total=3782 [2022-03-20 17:48:49,741 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) [2022-03-20 17:48:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:52,784 INFO L93 Difference]: Finished difference Result 2236 states and 3056 transitions. [2022-03-20 17:48:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 17:48:52,784 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 [2022-03-20 17:48:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:52,802 INFO L225 Difference]: With dead ends: 2236 [2022-03-20 17:48:52,802 INFO L226 Difference]: Without dead ends: 2234 [2022-03-20 17:48:52,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 117 SyntacticMatches, 13 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=628, Invalid=6329, Unknown=15, NotChecked=0, Total=6972 [2022-03-20 17:48:52,803 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 [2022-03-20 17:48:52,804 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] [2022-03-20 17:48:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2022-03-20 17:48:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2232. [2022-03-20 17:48:54,599 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) [2022-03-20 17:48:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 3052 transitions. [2022-03-20 17:48:54,601 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 3052 transitions. Word has length 110 [2022-03-20 17:48:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:54,602 INFO L478 AbstractCegarLoop]: Abstraction has 2232 states and 3052 transitions. [2022-03-20 17:48:54,602 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) [2022-03-20 17:48:54,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 3052 transitions. [2022-03-20 17:48:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 17:48:54,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:54,604 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] [2022-03-20 17:48:54,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-20 17:48:54,805 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 17:48:54,805 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1164108910, now seen corresponding path program 29 times [2022-03-20 17:48:54,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:54,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [592983514] [2022-03-20 17:48:54,806 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:54,806 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:54,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1164108910, now seen corresponding path program 30 times [2022-03-20 17:48:54,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:54,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987220579] [2022-03-20 17:48:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:54,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:54,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:54,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:48:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:54,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 17:48:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:54,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 17:48:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:54,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 17:48:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:54,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:48:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:54,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-20 17:48:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-03-20 17:48:54,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:54,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987220579] [2022-03-20 17:48:54,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987220579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:54,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218343947] [2022-03-20 17:48:54,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:48:54,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:54,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:54,904 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:54,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 17:48:55,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-20 17:48:55,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:55,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:48:55,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-03-20 17:48:55,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:48:55,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218343947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:55,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:48:55,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2022-03-20 17:48:55,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [592983514] [2022-03-20 17:48:55,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [592983514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:55,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:55,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:48:55,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582833846] [2022-03-20 17:48:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:55,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:48:55,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:55,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:48:55,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:48:55,516 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) [2022-03-20 17:48:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:57,316 INFO L93 Difference]: Finished difference Result 2235 states and 3055 transitions. [2022-03-20 17:48:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:48:57,316 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 [2022-03-20 17:48:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:57,316 INFO L225 Difference]: With dead ends: 2235 [2022-03-20 17:48:57,316 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 17:48:57,320 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 [2022-03-20 17:48:57,320 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:57,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 75 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:48:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 17:48:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 17:48:57,321 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) [2022-03-20 17:48:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 17:48:57,321 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-03-20 17:48:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:57,321 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 17:48:57,322 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) [2022-03-20 17:48:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 17:48:57,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 17:48:57,324 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 17:48:57,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 17:48:57,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 17:48:57,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.