/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/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 07:57:29,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 07:57:29,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 07:57:29,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 07:57:29,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 07:57:29,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 07:57:29,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 07:57:29,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 07:57:29,441 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 07:57:29,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 07:57:29,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 07:57:29,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 07:57:29,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 07:57:29,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 07:57:29,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 07:57:29,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 07:57:29,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 07:57:29,444 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 07:57:29,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 07:57:29,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 07:57:29,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 07:57:29,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 07:57:29,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 07:57:29,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:57:29,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 07:57:29,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 07:57:29,445 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 07:57:29,445 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 07:57:29,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 07:57:29,445 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 07:57:29,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 07:57:29,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 07:57:29,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 07:57:29,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 07:57:29,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 07:57:29,652 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 07:57:29,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-19 07:57:29,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a2a771a4/187f0a6134384e2d8f2cfb34f8fcde52/FLAGf20b39653 [2022-03-19 07:57:30,107 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 07:57:30,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-19 07:57:30,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a2a771a4/187f0a6134384e2d8f2cfb34f8fcde52/FLAGf20b39653 [2022-03-19 07:57:30,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a2a771a4/187f0a6134384e2d8f2cfb34f8fcde52 [2022-03-19 07:57:30,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 07:57:30,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 07:57:30,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 07:57:30,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 07:57:30,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 07:57:30,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:57:30" (1/1) ... [2022-03-19 07:57:30,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ae70c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30, skipping insertion in model container [2022-03-19 07:57:30,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:57:30" (1/1) ... [2022-03-19 07:57:30,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 07:57:30,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 07:57:30,328 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-03-19 07:57:30,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:57:30,351 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 07:57:30,361 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-03-19 07:57:30,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:57:30,380 INFO L208 MainTranslator]: Completed translation [2022-03-19 07:57:30,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30 WrapperNode [2022-03-19 07:57:30,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 07:57:30,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 07:57:30,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 07:57:30,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 07:57:30,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30" (1/1) ... [2022-03-19 07:57:30,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30" (1/1) ... [2022-03-19 07:57:30,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30" (1/1) ... [2022-03-19 07:57:30,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30" (1/1) ... [2022-03-19 07:57:30,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30" (1/1) ... [2022-03-19 07:57:30,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30" (1/1) ... [2022-03-19 07:57:30,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30" (1/1) ... [2022-03-19 07:57:30,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 07:57:30,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 07:57:30,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 07:57:30,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 07:57:30,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30" (1/1) ... [2022-03-19 07:57:30,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:57:30,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:30,438 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) [2022-03-19 07:57:30,462 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 [2022-03-19 07:57:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 07:57:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 07:57:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 07:57:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 07:57:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 07:57:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 07:57:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-19 07:57:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 07:57:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 07:57:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 07:57:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 07:57:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 07:57:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 07:57:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 07:57:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 07:57:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 07:57:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 07:57:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-19 07:57:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 07:57:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 07:57:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 07:57:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 07:57:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 07:57:30,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 07:57:30,537 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 07:57:30,538 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 07:57:30,632 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 07:57:30,636 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 07:57:30,636 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 07:57:30,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:57:30 BoogieIcfgContainer [2022-03-19 07:57:30,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 07:57:30,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 07:57:30,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 07:57:30,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 07:57:30,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 07:57:30" (1/3) ... [2022-03-19 07:57:30,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18660ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:57:30, skipping insertion in model container [2022-03-19 07:57:30,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:57:30" (2/3) ... [2022-03-19 07:57:30,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18660ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:57:30, skipping insertion in model container [2022-03-19 07:57:30,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:57:30" (3/3) ... [2022-03-19 07:57:30,654 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2022-03-19 07:57:30,657 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 07:57:30,657 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 07:57:30,691 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 07:57:30,695 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 [2022-03-19 07:57:30,695 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 07:57:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 07:57:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 07:57:30,718 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:30,718 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:30,719 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:30,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1868594418, now seen corresponding path program 1 times [2022-03-19 07:57:30,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:30,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1950124604] [2022-03-19 07:57:30,734 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:57:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1868594418, now seen corresponding path program 2 times [2022-03-19 07:57:30,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:30,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960911702] [2022-03-19 07:57:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:30,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:30,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:57:30,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:30,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960911702] [2022-03-19 07:57:30,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960911702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:30,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:30,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:57:30,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:30,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1950124604] [2022-03-19 07:57:30,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1950124604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:30,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:30,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:57:30,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686271866] [2022-03-19 07:57:30,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:30,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 07:57:30,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 07:57:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-19 07:57:31,001 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:57:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:31,123 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-03-19 07:57:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 07:57:31,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 07:57:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:31,132 INFO L225 Difference]: With dead ends: 48 [2022-03-19 07:57:31,133 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 07:57:31,136 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-19 07:57:31,139 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:31,140 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 39 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:57:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 07:57:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-19 07:57:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:57:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-19 07:57:31,165 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-03-19 07:57:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:31,166 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-19 07:57:31,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:57:31,166 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-19 07:57:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 07:57:31,167 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:31,167 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:31,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 07:57:31,168 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:31,169 INFO L85 PathProgramCache]: Analyzing trace with hash -426319892, now seen corresponding path program 1 times [2022-03-19 07:57:31,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:31,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [490475311] [2022-03-19 07:57:31,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:31,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash -426319892, now seen corresponding path program 2 times [2022-03-19 07:57:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:31,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987121921] [2022-03-19 07:57:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:31,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:31,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:57:31,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:31,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987121921] [2022-03-19 07:57:31,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987121921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:31,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644183644] [2022-03-19 07:57:31,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:57:31,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:31,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:31,388 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) [2022-03-19 07:57:31,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 07:57:31,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:57:31,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:57:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:31,519 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 11 treesize of output 7 [2022-03-19 07:57:31,565 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 15 treesize of output 7 [2022-03-19 07:57:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:57:31,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:31,647 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 14 treesize of output 12 [2022-03-19 07:57:31,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-03-19 07:57:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:57:31,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644183644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:57:31,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:57:31,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-03-19 07:57:31,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [490475311] [2022-03-19 07:57:31,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [490475311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:31,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:31,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 07:57:31,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194815455] [2022-03-19 07:57:31,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:31,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 07:57:31,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:31,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 07:57:31,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-19 07:57:31,677 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:57:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:31,827 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-19 07:57:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 07:57:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-19 07:57:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:31,829 INFO L225 Difference]: With dead ends: 32 [2022-03-19 07:57:31,829 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 07:57:31,829 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:57:31,830 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:31,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:57:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 07:57:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-03-19 07:57:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 07:57:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-19 07:57:31,835 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2022-03-19 07:57:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:31,836 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-19 07:57:31,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:57:31,836 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-19 07:57:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 07:57:31,836 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:31,836 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:31,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:32,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:32,056 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1328899642, now seen corresponding path program 1 times [2022-03-19 07:57:32,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:32,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1154791108] [2022-03-19 07:57:32,058 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:32,058 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:32,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1328899642, now seen corresponding path program 2 times [2022-03-19 07:57:32,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:32,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759060519] [2022-03-19 07:57:32,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:32,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:32,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:32,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 07:57:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:57:32,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:32,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759060519] [2022-03-19 07:57:32,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759060519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:32,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885113748] [2022-03-19 07:57:32,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:57:32,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:32,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:32,152 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) [2022-03-19 07:57:32,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 07:57:32,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:57:32,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:32,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:57:32,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:57:32,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:57:32,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885113748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:57:32,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:57:32,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-19 07:57:32,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:32,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1154791108] [2022-03-19 07:57:32,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1154791108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:32,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:32,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 07:57:32,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554427152] [2022-03-19 07:57:32,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:32,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 07:57:32,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:32,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 07:57:32,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 07:57:32,355 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:57:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:32,445 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-03-19 07:57:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:57:32,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 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 [2022-03-19 07:57:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:32,448 INFO L225 Difference]: With dead ends: 46 [2022-03-19 07:57:32,448 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 07:57:32,448 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:57:32,454 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:32,455 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:57:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 07:57:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-19 07:57:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 07:57:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-19 07:57:32,466 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-03-19 07:57:32,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:32,466 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-19 07:57:32,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:57:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-19 07:57:32,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 07:57:32,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:32,467 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:32,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:32,683 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,SelfDestructingSolverStorable2 [2022-03-19 07:57:32,684 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:32,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1936590556, now seen corresponding path program 3 times [2022-03-19 07:57:32,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:32,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089849380] [2022-03-19 07:57:32,685 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:32,685 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1936590556, now seen corresponding path program 4 times [2022-03-19 07:57:32,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:32,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329336049] [2022-03-19 07:57:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:32,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:32,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:32,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 07:57:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:57:32,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:32,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329336049] [2022-03-19 07:57:32,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329336049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:32,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849578902] [2022-03-19 07:57:32,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:57:32,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:32,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:32,824 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) [2022-03-19 07:57:32,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 07:57:32,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:57:32,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 07:57:32,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:32,894 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 [2022-03-19 07:57:33,204 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 07:57:33,204 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 [2022-03-19 07:57:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:57:33,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:33,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849578902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:33,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 07:57:33,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-03-19 07:57:33,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:33,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089849380] [2022-03-19 07:57:33,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089849380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:33,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:33,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:57:33,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194215057] [2022-03-19 07:57:33,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:33,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:57:33,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:57:33,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:57:33,339 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:57:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:33,551 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-03-19 07:57:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:57:33,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 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 26 [2022-03-19 07:57:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:33,552 INFO L225 Difference]: With dead ends: 42 [2022-03-19 07:57:33,552 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 07:57:33,552 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:57:33,553 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:33,553 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:57:33,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 07:57:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-03-19 07:57:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 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) [2022-03-19 07:57:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-19 07:57:33,558 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 26 [2022-03-19 07:57:33,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:33,558 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-19 07:57:33,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:57:33,559 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-19 07:57:33,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 07:57:33,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:33,559 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:33,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:33,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:33,771 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1234500350, now seen corresponding path program 5 times [2022-03-19 07:57:33,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:33,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1126263948] [2022-03-19 07:57:33,773 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:33,773 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1234500350, now seen corresponding path program 6 times [2022-03-19 07:57:33,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:33,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9958984] [2022-03-19 07:57:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:33,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:33,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:33,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 07:57:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 07:57:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:57:33,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:33,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9958984] [2022-03-19 07:57:33,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9958984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:33,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598651618] [2022-03-19 07:57:33,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:57:33,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:33,844 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) [2022-03-19 07:57:33,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 07:57:33,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:57:33,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:33,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 07:57:33,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:57:33,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:57:34,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598651618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:57:34,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:57:34,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-03-19 07:57:34,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:34,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1126263948] [2022-03-19 07:57:34,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1126263948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:34,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:34,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 07:57:34,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886263203] [2022-03-19 07:57:34,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:34,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 07:57:34,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 07:57:34,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-19 07:57:34,041 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 07:57:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:34,180 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-19 07:57:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 07:57:34,180 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-03-19 07:57:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:34,181 INFO L225 Difference]: With dead ends: 60 [2022-03-19 07:57:34,181 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 07:57:34,181 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-03-19 07:57:34,182 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:34,182 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 44 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:57:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 07:57:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-19 07:57:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 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) [2022-03-19 07:57:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-19 07:57:34,188 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-03-19 07:57:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:34,188 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-19 07:57:34,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 07:57:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-19 07:57:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 07:57:34,189 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:34,189 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:34,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:34,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:34,397 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash -487899940, now seen corresponding path program 7 times [2022-03-19 07:57:34,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:34,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [729314684] [2022-03-19 07:57:34,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:34,398 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:34,398 INFO L85 PathProgramCache]: Analyzing trace with hash -487899940, now seen corresponding path program 8 times [2022-03-19 07:57:34,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:34,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218686281] [2022-03-19 07:57:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:34,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:34,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 07:57:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:34,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 07:57:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:57:34,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:34,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218686281] [2022-03-19 07:57:34,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218686281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:34,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944202257] [2022-03-19 07:57:34,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:57:34,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:34,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:34,544 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) [2022-03-19 07:57:34,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 07:57:34,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:57:34,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:34,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 07:57:34,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:34,631 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 [2022-03-19 07:57:35,105 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 07:57:35,105 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 [2022-03-19 07:57:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:57:35,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:35,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944202257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:35,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 07:57:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-03-19 07:57:35,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:35,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [729314684] [2022-03-19 07:57:35,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [729314684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:35,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:57:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665877790] [2022-03-19 07:57:35,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:35,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:57:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:57:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-19 07:57:35,247 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 07:57:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:35,562 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-03-19 07:57:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:57:35,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-03-19 07:57:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:35,563 INFO L225 Difference]: With dead ends: 52 [2022-03-19 07:57:35,563 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 07:57:35,564 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 07:57:35,564 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:35,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 65 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:57:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 07:57:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-03-19 07:57:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 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) [2022-03-19 07:57:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-03-19 07:57:35,571 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 36 [2022-03-19 07:57:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:35,571 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-03-19 07:57:35,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 07:57:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-03-19 07:57:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 07:57:35,572 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:35,572 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:35,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:35,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:35,789 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:35,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:35,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1322580298, now seen corresponding path program 9 times [2022-03-19 07:57:35,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:35,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [519950424] [2022-03-19 07:57:35,791 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:35,791 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1322580298, now seen corresponding path program 10 times [2022-03-19 07:57:35,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:35,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82775941] [2022-03-19 07:57:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:35,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:35,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 07:57:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:35,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 07:57:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:35,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 07:57:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 07:57:35,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82775941] [2022-03-19 07:57:35,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82775941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166291053] [2022-03-19 07:57:35,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:57:35,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:35,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:35,889 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) [2022-03-19 07:57:35,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 07:57:35,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:57:35,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:35,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 07:57:35,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 07:57:36,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 07:57:36,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166291053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:57:36,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:57:36,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-03-19 07:57:36,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:36,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [519950424] [2022-03-19 07:57:36,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [519950424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:36,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:36,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:57:36,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281725597] [2022-03-19 07:57:36,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:36,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:57:36,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:36,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:57:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:57:36,126 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 07:57:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:36,308 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-03-19 07:57:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:57:36,308 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 44 [2022-03-19 07:57:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:36,309 INFO L225 Difference]: With dead ends: 74 [2022-03-19 07:57:36,309 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 07:57:36,310 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-03-19 07:57:36,310 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:36,310 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 46 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:57:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 07:57:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-19 07:57:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 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) [2022-03-19 07:57:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-03-19 07:57:36,316 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-03-19 07:57:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:36,317 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-03-19 07:57:36,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 07:57:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-03-19 07:57:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 07:57:36,318 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:36,318 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:36,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:36,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:36,532 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1186401044, now seen corresponding path program 11 times [2022-03-19 07:57:36,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:36,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [683158052] [2022-03-19 07:57:36,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:36,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:36,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1186401044, now seen corresponding path program 12 times [2022-03-19 07:57:36,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:36,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465911182] [2022-03-19 07:57:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:36,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:36,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:36,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 07:57:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:36,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 07:57:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:36,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 07:57:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 07:57:36,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:36,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465911182] [2022-03-19 07:57:36,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465911182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:36,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582638503] [2022-03-19 07:57:36,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:57:36,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:36,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:36,678 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) [2022-03-19 07:57:36,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 07:57:36,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:57:36,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:36,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 07:57:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:36,820 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 [2022-03-19 07:57:37,462 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 07:57:37,463 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 [2022-03-19 07:57:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 07:57:37,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:37,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582638503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:37,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 07:57:37,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-03-19 07:57:37,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:37,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [683158052] [2022-03-19 07:57:37,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [683158052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:37,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:37,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:57:37,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278630323] [2022-03-19 07:57:37,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:37,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:57:37,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:37,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:57:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-03-19 07:57:37,597 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 07:57:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:38,004 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2022-03-19 07:57:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:57:38,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2022-03-19 07:57:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:38,005 INFO L225 Difference]: With dead ends: 62 [2022-03-19 07:57:38,005 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 07:57:38,006 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 07:57:38,006 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:38,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 80 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:57:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 07:57:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-03-19 07:57:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 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) [2022-03-19 07:57:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-19 07:57:38,023 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 46 [2022-03-19 07:57:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:38,024 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-19 07:57:38,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 07:57:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-19 07:57:38,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 07:57:38,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:38,024 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:38,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:38,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:38,239 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1707008786, now seen corresponding path program 13 times [2022-03-19 07:57:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:38,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [294986105] [2022-03-19 07:57:38,241 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:38,241 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:38,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1707008786, now seen corresponding path program 14 times [2022-03-19 07:57:38,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:38,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766007228] [2022-03-19 07:57:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:38,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:38,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:38,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 07:57:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:38,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 07:57:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:38,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 07:57:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:38,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 07:57:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 07:57:38,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:38,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766007228] [2022-03-19 07:57:38,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766007228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:38,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786014489] [2022-03-19 07:57:38,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:57:38,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:38,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:38,376 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) [2022-03-19 07:57:38,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 07:57:38,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:57:38,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:38,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:57:38,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 07:57:38,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 07:57:38,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786014489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:57:38,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:57:38,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-03-19 07:57:38,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:38,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [294986105] [2022-03-19 07:57:38,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [294986105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:38,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:38,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:57:38,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820383842] [2022-03-19 07:57:38,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:38,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:57:38,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:57:38,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:57:38,676 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 07:57:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:38,909 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-03-19 07:57:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:57:38,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2022-03-19 07:57:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:38,910 INFO L225 Difference]: With dead ends: 88 [2022-03-19 07:57:38,910 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 07:57:38,911 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-03-19 07:57:38,911 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:38,912 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 48 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:57:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 07:57:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-19 07:57:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 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) [2022-03-19 07:57:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-03-19 07:57:38,918 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-03-19 07:57:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:38,918 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-03-19 07:57:38,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 07:57:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-03-19 07:57:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 07:57:38,918 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:38,918 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:38,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:39,133 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,SelfDestructingSolverStorable8 [2022-03-19 07:57:39,135 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash -275659828, now seen corresponding path program 15 times [2022-03-19 07:57:39,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:39,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843962613] [2022-03-19 07:57:39,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:39,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash -275659828, now seen corresponding path program 16 times [2022-03-19 07:57:39,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:39,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499030511] [2022-03-19 07:57:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:39,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:39,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:39,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 07:57:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:39,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 07:57:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:39,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 07:57:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:39,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 07:57:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 07:57:39,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:39,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499030511] [2022-03-19 07:57:39,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499030511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:39,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821958890] [2022-03-19 07:57:39,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:57:39,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:39,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:39,323 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) [2022-03-19 07:57:39,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 07:57:39,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:57:39,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:39,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 07:57:39,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:39,459 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 [2022-03-19 07:57:40,259 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 07:57:40,259 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 [2022-03-19 07:57:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 07:57:40,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:40,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821958890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:40,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 07:57:40,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2022-03-19 07:57:40,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:40,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843962613] [2022-03-19 07:57:40,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843962613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:40,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:40,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:57:40,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938569395] [2022-03-19 07:57:40,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:40,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:57:40,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:57:40,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:57:40,638 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 07:57:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:41,123 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-03-19 07:57:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 07:57:41,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2022-03-19 07:57:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:41,124 INFO L225 Difference]: With dead ends: 72 [2022-03-19 07:57:41,124 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 07:57:41,125 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=251, Invalid=2401, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 07:57:41,125 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:41,125 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 95 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:57:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 07:57:41,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-03-19 07:57:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 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) [2022-03-19 07:57:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-03-19 07:57:41,133 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 56 [2022-03-19 07:57:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:41,133 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-03-19 07:57:41,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 07:57:41,133 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-03-19 07:57:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 07:57:41,134 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:41,134 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:41,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:41,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 07:57:41,352 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:41,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1978425946, now seen corresponding path program 17 times [2022-03-19 07:57:41,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:41,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [326814109] [2022-03-19 07:57:41,353 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:41,353 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:41,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1978425946, now seen corresponding path program 18 times [2022-03-19 07:57:41,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:41,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907747096] [2022-03-19 07:57:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:41,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:41,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:41,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 07:57:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:41,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 07:57:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:41,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 07:57:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:41,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 07:57:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:41,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 07:57:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 07:57:41,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907747096] [2022-03-19 07:57:41,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907747096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031145744] [2022-03-19 07:57:41,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:57:41,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:41,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:41,467 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) [2022-03-19 07:57:41,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 07:57:41,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 07:57:41,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:41,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 07:57:41,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 07:57:41,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 07:57:41,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031145744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:57:41,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:57:41,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-03-19 07:57:41,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:41,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [326814109] [2022-03-19 07:57:41,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [326814109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:41,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:41,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:57:41,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013803698] [2022-03-19 07:57:41,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:41,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:57:41,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:57:41,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:57:41,829 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 07:57:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:42,039 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-03-19 07:57:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:57:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 64 [2022-03-19 07:57:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:42,040 INFO L225 Difference]: With dead ends: 102 [2022-03-19 07:57:42,040 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 07:57:42,041 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:57:42,042 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:42,042 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:57:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 07:57:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-19 07:57:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 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) [2022-03-19 07:57:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-03-19 07:57:42,059 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-03-19 07:57:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:42,059 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-03-19 07:57:42,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 07:57:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-03-19 07:57:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 07:57:42,060 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:42,060 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:42,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:42,274 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,SelfDestructingSolverStorable10 [2022-03-19 07:57:42,274 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:42,274 INFO L85 PathProgramCache]: Analyzing trace with hash -442513660, now seen corresponding path program 19 times [2022-03-19 07:57:42,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:42,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1733737520] [2022-03-19 07:57:42,275 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:42,275 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash -442513660, now seen corresponding path program 20 times [2022-03-19 07:57:42,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:42,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477670008] [2022-03-19 07:57:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:42,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:42,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 07:57:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:42,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 07:57:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:42,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 07:57:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:42,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 07:57:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:42,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 07:57:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 07:57:42,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:42,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477670008] [2022-03-19 07:57:42,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477670008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:42,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701185] [2022-03-19 07:57:42,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:57:42,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:42,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:42,494 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) [2022-03-19 07:57:42,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 07:57:42,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:57:42,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:42,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 07:57:42,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:42,646 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 [2022-03-19 07:57:43,677 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 07:57:43,678 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 [2022-03-19 07:57:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 07:57:43,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:43,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:43,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 07:57:43,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2022-03-19 07:57:43,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:43,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1733737520] [2022-03-19 07:57:43,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1733737520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:43,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:43,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 07:57:43,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678328229] [2022-03-19 07:57:43,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:43,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 07:57:43,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:43,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 07:57:43,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 07:57:43,833 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 07:57:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:44,445 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2022-03-19 07:57:44,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 07:57:44,445 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 66 [2022-03-19 07:57:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:44,446 INFO L225 Difference]: With dead ends: 82 [2022-03-19 07:57:44,446 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 07:57:44,447 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=3011, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 07:57:44,447 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:44,447 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 102 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:57:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 07:57:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-03-19 07:57:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 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) [2022-03-19 07:57:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-03-19 07:57:44,457 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 66 [2022-03-19 07:57:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:44,457 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-03-19 07:57:44,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 07:57:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-03-19 07:57:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 07:57:44,457 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:44,457 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:44,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:44,658 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,SelfDestructingSolverStorable11 [2022-03-19 07:57:44,658 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:44,658 INFO L85 PathProgramCache]: Analyzing trace with hash -832116514, now seen corresponding path program 21 times [2022-03-19 07:57:44,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:44,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1032178469] [2022-03-19 07:57:44,659 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:44,659 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash -832116514, now seen corresponding path program 22 times [2022-03-19 07:57:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199897316] [2022-03-19 07:57:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:44,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:44,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:44,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 07:57:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:44,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 07:57:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:44,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 07:57:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:44,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 07:57:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:44,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 07:57:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:44,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 07:57:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 07:57:44,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199897316] [2022-03-19 07:57:44,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199897316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038438403] [2022-03-19 07:57:44,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:57:44,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:44,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:44,821 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) [2022-03-19 07:57:44,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 07:57:44,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:57:44,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:44,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 07:57:44,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 07:57:45,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 07:57:45,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038438403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:57:45,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:57:45,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-03-19 07:57:45,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:45,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1032178469] [2022-03-19 07:57:45,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1032178469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:45,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:45,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:57:45,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726692211] [2022-03-19 07:57:45,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:45,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:57:45,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:45,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:57:45,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-19 07:57:45,223 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 07:57:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:45,474 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2022-03-19 07:57:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 07:57:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 74 [2022-03-19 07:57:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:45,475 INFO L225 Difference]: With dead ends: 116 [2022-03-19 07:57:45,475 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 07:57:45,476 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 07:57:45,476 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:45,476 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 62 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:57:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 07:57:45,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-03-19 07:57:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 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) [2022-03-19 07:57:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-19 07:57:45,485 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-03-19 07:57:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:45,485 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-19 07:57:45,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 07:57:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-19 07:57:45,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-19 07:57:45,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:45,485 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:45,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:45,699 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,SelfDestructingSolverStorable12 [2022-03-19 07:57:45,699 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2005759164, now seen corresponding path program 23 times [2022-03-19 07:57:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:45,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902780596] [2022-03-19 07:57:45,701 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:45,701 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:45,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2005759164, now seen corresponding path program 24 times [2022-03-19 07:57:45,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:45,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138686635] [2022-03-19 07:57:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:45,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:45,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:45,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 07:57:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:45,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 07:57:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:45,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 07:57:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:45,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 07:57:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:45,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 07:57:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:45,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 07:57:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 07:57:45,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:45,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138686635] [2022-03-19 07:57:45,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138686635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:45,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959415469] [2022-03-19 07:57:45,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:57:45,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:45,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:45,981 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) [2022-03-19 07:57:46,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 07:57:46,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 07:57:46,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:46,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 07:57:46,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:46,198 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 [2022-03-19 07:57:47,462 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 07:57:47,462 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 [2022-03-19 07:57:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 07:57:47,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:47,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959415469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:47,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 07:57:47,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2022-03-19 07:57:47,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:47,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902780596] [2022-03-19 07:57:47,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902780596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:47,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:47,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 07:57:47,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620556558] [2022-03-19 07:57:47,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:47,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 07:57:47,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 07:57:47,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:57:47,637 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 07:57:48,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:48,393 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-03-19 07:57:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 07:57:48,394 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 76 [2022-03-19 07:57:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:48,395 INFO L225 Difference]: With dead ends: 92 [2022-03-19 07:57:48,395 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 07:57:48,396 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 64 SyntacticMatches, 12 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=343, Invalid=3689, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 07:57:48,396 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:48,396 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 117 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:57:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 07:57:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-03-19 07:57:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 07:57:48,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-03-19 07:57:48,426 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 76 [2022-03-19 07:57:48,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:48,426 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-03-19 07:57:48,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 07:57:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-03-19 07:57:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 07:57:48,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:48,427 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:48,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:48,643 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,SelfDestructingSolverStorable13 [2022-03-19 07:57:48,643 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:48,644 INFO L85 PathProgramCache]: Analyzing trace with hash -209232234, now seen corresponding path program 25 times [2022-03-19 07:57:48,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:48,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045649607] [2022-03-19 07:57:48,645 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:48,645 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash -209232234, now seen corresponding path program 26 times [2022-03-19 07:57:48,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:48,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124475947] [2022-03-19 07:57:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:48,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:48,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:48,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 07:57:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:48,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 07:57:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:48,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 07:57:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:48,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 07:57:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:48,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 07:57:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:48,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 07:57:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:48,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 07:57:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 87 proven. 74 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 07:57:48,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:48,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124475947] [2022-03-19 07:57:48,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124475947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:48,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214857434] [2022-03-19 07:57:48,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:57:48,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:48,823 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) [2022-03-19 07:57:48,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 07:57:48,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:57:48,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 07:57:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 07:57:49,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 07:57:49,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214857434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:57:49,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:57:49,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-03-19 07:57:49,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:49,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045649607] [2022-03-19 07:57:49,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045649607] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:49,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:49,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 07:57:49,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081726182] [2022-03-19 07:57:49,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:49,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 07:57:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:49,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 07:57:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-03-19 07:57:49,312 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 07:57:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:49,626 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2022-03-19 07:57:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 07:57:49,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 84 [2022-03-19 07:57:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:49,627 INFO L225 Difference]: With dead ends: 130 [2022-03-19 07:57:49,627 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 07:57:49,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 07:57:49,628 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:49,628 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 59 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:57:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 07:57:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-03-19 07:57:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 07:57:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-19 07:57:49,637 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-03-19 07:57:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:49,637 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-19 07:57:49,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 07:57:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-19 07:57:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 07:57:49,638 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:49,638 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:49,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-19 07:57:49,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:49,851 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash 814689524, now seen corresponding path program 27 times [2022-03-19 07:57:49,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:49,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109532875] [2022-03-19 07:57:49,853 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:49,853 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:49,853 INFO L85 PathProgramCache]: Analyzing trace with hash 814689524, now seen corresponding path program 28 times [2022-03-19 07:57:49,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:49,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413288719] [2022-03-19 07:57:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:50,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:50,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 07:57:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:50,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 07:57:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:50,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 07:57:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:50,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 07:57:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:50,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 07:57:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:50,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 07:57:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:50,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 07:57:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 07:57:50,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:50,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413288719] [2022-03-19 07:57:50,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413288719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:50,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370592275] [2022-03-19 07:57:50,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:57:50,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:50,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:50,155 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) [2022-03-19 07:57:50,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 07:57:50,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:57:50,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 07:57:50,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:50,414 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 [2022-03-19 07:57:51,898 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 07:57:51,898 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 [2022-03-19 07:57:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 91 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 07:57:51,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:52,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370592275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:52,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 07:57:52,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2022-03-19 07:57:52,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:52,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109532875] [2022-03-19 07:57:52,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109532875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:52,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:52,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 07:57:52,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073008169] [2022-03-19 07:57:52,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:52,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 07:57:52,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 07:57:52,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 07:57:52,093 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 07:57:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:52,926 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2022-03-19 07:57:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 07:57:52,927 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 86 [2022-03-19 07:57:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:52,927 INFO L225 Difference]: With dead ends: 102 [2022-03-19 07:57:52,927 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 07:57:52,928 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 72 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=395, Invalid=4435, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 07:57:52,929 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 65 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:52,929 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 124 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:57:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 07:57:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-03-19 07:57:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 07:57:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-03-19 07:57:52,939 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 86 [2022-03-19 07:57:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:52,940 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-03-19 07:57:52,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 07:57:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-03-19 07:57:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-19 07:57:52,940 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:52,940 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:52,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 07:57:53,141 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,SelfDestructingSolverStorable15 [2022-03-19 07:57:53,141 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1169596722, now seen corresponding path program 29 times [2022-03-19 07:57:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:53,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831679816] [2022-03-19 07:57:53,143 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:53,143 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1169596722, now seen corresponding path program 30 times [2022-03-19 07:57:53,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:53,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425442382] [2022-03-19 07:57:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:53,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:53,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 07:57:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:53,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 07:57:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:53,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 07:57:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:53,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 07:57:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:53,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 07:57:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:53,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 07:57:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:53,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 07:57:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:53,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 07:57:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 115 proven. 93 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 07:57:53,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:53,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425442382] [2022-03-19 07:57:53,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425442382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:53,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7703556] [2022-03-19 07:57:53,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:57:53,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:53,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:53,352 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) [2022-03-19 07:57:53,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 07:57:53,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 07:57:53,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:53,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 07:57:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 07:57:53,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:57:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 07:57:53,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7703556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:57:53,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:57:53,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-03-19 07:57:53,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:57:53,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831679816] [2022-03-19 07:57:53,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831679816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:57:53,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:57:53,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 07:57:53,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736533335] [2022-03-19 07:57:53,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:57:53,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 07:57:53,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 07:57:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 07:57:53,886 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 07:57:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:57:54,234 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2022-03-19 07:57:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 07:57:54,234 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 94 [2022-03-19 07:57:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:57:54,235 INFO L225 Difference]: With dead ends: 144 [2022-03-19 07:57:54,235 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 07:57:54,236 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=490, Invalid=2162, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 07:57:54,236 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:57:54,236 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 61 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:57:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 07:57:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-19 07:57:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 07:57:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-03-19 07:57:54,249 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-03-19 07:57:54,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:57:54,249 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-03-19 07:57:54,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 07:57:54,249 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-03-19 07:57:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 07:57:54,251 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:57:54,251 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:57:54,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-19 07:57:54,468 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,SelfDestructingSolverStorable16 [2022-03-19 07:57:54,468 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:57:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:57:54,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1315000236, now seen corresponding path program 31 times [2022-03-19 07:57:54,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:57:54,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916162240] [2022-03-19 07:57:54,470 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:57:54,470 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:57:54,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1315000236, now seen corresponding path program 32 times [2022-03-19 07:57:54,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:57:54,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210437414] [2022-03-19 07:57:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:57:54,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:57:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:54,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:57:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:54,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 07:57:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 07:57:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:54,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 07:57:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:54,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 07:57:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:54,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 07:57:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:54,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 07:57:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:54,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 07:57:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:54,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 07:57:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:57:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 07:57:54,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:57:54,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210437414] [2022-03-19 07:57:54,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210437414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:57:54,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647850394] [2022-03-19 07:57:54,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:57:54,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:57:54,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:57:54,788 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) [2022-03-19 07:57:54,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 07:57:54,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:57:54,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:57:54,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 07:57:54,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:57:54,922 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 [2022-03-19 07:59:32,496 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 19 treesize of output 7 [2022-03-19 07:59:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 07:59:32,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:59:34,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-19 07:59:34,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-19 07:59:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 07:59:34,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647850394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:59:34,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:59:34,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 38 [2022-03-19 07:59:34,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:59:34,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916162240] [2022-03-19 07:59:34,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916162240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:59:34,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:59:34,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 07:59:34,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455693630] [2022-03-19 07:59:34,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:59:34,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 07:59:34,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 07:59:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1291, Unknown=9, NotChecked=0, Total=1406 [2022-03-19 07:59:34,778 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 07:59:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:59:35,693 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2022-03-19 07:59:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 07:59:35,693 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 96 [2022-03-19 07:59:35,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:59:35,694 INFO L225 Difference]: With dead ends: 112 [2022-03-19 07:59:35,694 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 07:59:35,695 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 178 SyntacticMatches, 20 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 100.0s TimeCoverageRelationStatistics Valid=244, Invalid=3529, Unknown=9, NotChecked=0, Total=3782 [2022-03-19 07:59:35,695 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:59:35,695 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 135 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:59:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 07:59:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-03-19 07:59:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 07:59:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-03-19 07:59:35,708 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 96 [2022-03-19 07:59:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:59:35,708 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-03-19 07:59:35,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 07:59:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-03-19 07:59:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-19 07:59:35,709 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:59:35,709 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:59:35,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 07:59:35,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 07:59:35,910 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:59:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:59:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1911993978, now seen corresponding path program 33 times [2022-03-19 07:59:35,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:35,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1338795367] [2022-03-19 07:59:35,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:59:35,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:59:35,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1911993978, now seen corresponding path program 34 times [2022-03-19 07:59:35,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:59:35,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449430432] [2022-03-19 07:59:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:59:35,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:59:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:59:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 07:59:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 07:59:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 07:59:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 07:59:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 07:59:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 07:59:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 07:59:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 07:59:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 07:59:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 147 proven. 114 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 07:59:36,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:59:36,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449430432] [2022-03-19 07:59:36,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449430432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:59:36,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254237997] [2022-03-19 07:59:36,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:59:36,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:59:36,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:59:36,159 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) [2022-03-19 07:59:36,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 07:59:36,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:59:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:59:36,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 07:59:36,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:59:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 180 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 07:59:36,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:59:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 180 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 07:59:36,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254237997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:59:36,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:59:36,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-03-19 07:59:36,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:59:36,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1338795367] [2022-03-19 07:59:36,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1338795367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:59:36,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:59:36,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 07:59:36,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940229889] [2022-03-19 07:59:36,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:59:36,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 07:59:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:36,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 07:59:36,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:59:36,895 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 07:59:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:59:37,306 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-03-19 07:59:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 07:59:37,306 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 104 [2022-03-19 07:59:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:59:37,307 INFO L225 Difference]: With dead ends: 158 [2022-03-19 07:59:37,307 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 07:59:37,308 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=582, Invalid=2610, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 07:59:37,309 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:59:37,309 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:59:37,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 07:59:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-03-19 07:59:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 07:59:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-03-19 07:59:37,321 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-03-19 07:59:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:59:37,321 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-03-19 07:59:37,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 07:59:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-03-19 07:59:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-19 07:59:37,322 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:59:37,322 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:59:37,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-19 07:59:37,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:59:37,523 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:59:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:59:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1220002588, now seen corresponding path program 35 times [2022-03-19 07:59:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:37,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2139930997] [2022-03-19 07:59:37,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:59:37,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:59:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1220002588, now seen corresponding path program 36 times [2022-03-19 07:59:37,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:59:37,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887438850] [2022-03-19 07:59:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:59:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:59:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:59:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 07:59:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 07:59:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 07:59:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 07:59:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 07:59:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 07:59:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 07:59:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 07:59:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 07:59:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 18 proven. 262 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 07:59:37,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:59:37,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887438850] [2022-03-19 07:59:37,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887438850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:59:37,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776398965] [2022-03-19 07:59:37,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:59:37,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:59:37,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:59:37,914 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) [2022-03-19 07:59:37,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 07:59:38,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 07:59:38,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:59:38,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 07:59:38,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:59:38,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-03-19 07:59:42,449 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 07:59:42,449 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 [2022-03-19 07:59:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 153 proven. 127 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 07:59:42,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:59:42,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776398965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:59:42,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 07:59:42,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2022-03-19 07:59:42,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:59:42,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2139930997] [2022-03-19 07:59:42,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2139930997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:59:42,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:59:42,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 07:59:42,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726140276] [2022-03-19 07:59:42,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:59:42,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 07:59:42,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:42,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 07:59:42,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2874, Unknown=1, NotChecked=0, Total=3192 [2022-03-19 07:59:42,645 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 07:59:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:59:43,819 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2022-03-19 07:59:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 07:59:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 106 [2022-03-19 07:59:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:59:43,820 INFO L225 Difference]: With dead ends: 122 [2022-03-19 07:59:43,820 INFO L226 Difference]: Without dead ends: 120 [2022-03-19 07:59:43,822 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 88 SyntacticMatches, 17 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=525, Invalid=6280, Unknown=1, NotChecked=0, Total=6806 [2022-03-19 07:59:43,822 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:59:43,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 146 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:59:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-19 07:59:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-03-19 07:59:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.021978021978022) internal successors, (93), 92 states have internal predecessors, (93), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 07:59:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-03-19 07:59:43,835 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 106 [2022-03-19 07:59:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:59:43,835 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-03-19 07:59:43,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 07:59:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-03-19 07:59:43,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-19 07:59:43,835 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:59:43,835 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:59:43,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 07:59:44,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:59:44,037 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:59:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:59:44,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059454, now seen corresponding path program 37 times [2022-03-19 07:59:44,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:44,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1762015529] [2022-03-19 07:59:44,038 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:59:44,038 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:59:44,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059454, now seen corresponding path program 38 times [2022-03-19 07:59:44,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:59:44,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697639336] [2022-03-19 07:59:44,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:59:44,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:59:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:59:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 07:59:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 07:59:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 07:59:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 07:59:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 07:59:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 07:59:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 07:59:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 07:59:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 07:59:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-19 07:59:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 183 proven. 137 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 07:59:44,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:59:44,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697639336] [2022-03-19 07:59:44,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697639336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:59:44,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205323241] [2022-03-19 07:59:44,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:59:44,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:59:44,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:59:44,305 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) [2022-03-19 07:59:44,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 07:59:44,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:59:44,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:59:44,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 07:59:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:59:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 220 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 07:59:44,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:59:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 220 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 07:59:45,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205323241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:59:45,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:59:45,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 39 [2022-03-19 07:59:45,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:59:45,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1762015529] [2022-03-19 07:59:45,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1762015529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:59:45,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:59:45,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 07:59:45,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314090602] [2022-03-19 07:59:45,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:59:45,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 07:59:45,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 07:59:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 07:59:45,004 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 07:59:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:59:45,455 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2022-03-19 07:59:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 07:59:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 114 [2022-03-19 07:59:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:59:45,459 INFO L225 Difference]: With dead ends: 172 [2022-03-19 07:59:45,459 INFO L226 Difference]: Without dead ends: 120 [2022-03-19 07:59:45,460 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=682, Invalid=3100, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 07:59:45,461 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:59:45,461 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 65 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:59:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-19 07:59:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-03-19 07:59:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.021505376344086) internal successors, (95), 94 states have internal predecessors, (95), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 07:59:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-03-19 07:59:45,478 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2022-03-19 07:59:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:59:45,478 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-03-19 07:59:45,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 07:59:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-03-19 07:59:45,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 07:59:45,478 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:59:45,479 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:59:45,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 07:59:45,696 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,SelfDestructingSolverStorable20 [2022-03-19 07:59:45,697 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:59:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:59:45,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1880118428, now seen corresponding path program 39 times [2022-03-19 07:59:45,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:45,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [326667632] [2022-03-19 07:59:45,698 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:59:45,698 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:59:45,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1880118428, now seen corresponding path program 40 times [2022-03-19 07:59:45,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:59:45,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097765514] [2022-03-19 07:59:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:59:45,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:59:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:59:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 07:59:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 07:59:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 07:59:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 07:59:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 07:59:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 07:59:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 07:59:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 07:59:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 07:59:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-19 07:59:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 20 proven. 321 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 07:59:46,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:59:46,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097765514] [2022-03-19 07:59:46,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097765514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:59:46,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216451966] [2022-03-19 07:59:46,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:59:46,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:59:46,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:59:46,145 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) [2022-03-19 07:59:46,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 07:59:46,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:59:46,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:59:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 07:59:46,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:59:46,522 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 [2022-03-19 07:59:48,944 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 07:59:48,944 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 [2022-03-19 07:59:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 190 proven. 151 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 07:59:49,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:59:49,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216451966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:59:49,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 07:59:49,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 58 [2022-03-19 07:59:49,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:59:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [326667632] [2022-03-19 07:59:49,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [326667632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:59:49,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:59:49,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 07:59:49,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857229086] [2022-03-19 07:59:49,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:59:49,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 07:59:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:49,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 07:59:49,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 07:59:49,351 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 07:59:50,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:59:50,677 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2022-03-19 07:59:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 07:59:50,679 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 116 [2022-03-19 07:59:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:59:50,679 INFO L225 Difference]: With dead ends: 132 [2022-03-19 07:59:50,679 INFO L226 Difference]: Without dead ends: 130 [2022-03-19 07:59:50,680 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 96 SyntacticMatches, 20 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=575, Invalid=7081, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 07:59:50,681 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 80 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 07:59:50,681 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 157 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2312 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 07:59:50,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-19 07:59:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-03-19 07:59:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 99 states have (on average 1.02020202020202) internal successors, (101), 100 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 07:59:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-03-19 07:59:50,696 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 116 [2022-03-19 07:59:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:59:50,696 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-03-19 07:59:50,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 07:59:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-03-19 07:59:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 07:59:50,697 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:59:50,697 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:59:50,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 07:59:50,906 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,SelfDestructingSolverStorable21 [2022-03-19 07:59:50,906 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:59:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:59:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1566810506, now seen corresponding path program 41 times [2022-03-19 07:59:50,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:50,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432392150] [2022-03-19 07:59:50,907 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:59:50,908 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:59:50,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1566810506, now seen corresponding path program 42 times [2022-03-19 07:59:50,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:59:50,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545646377] [2022-03-19 07:59:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:59:50,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:59:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:59:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 07:59:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 07:59:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 07:59:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 07:59:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 07:59:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 07:59:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 07:59:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 07:59:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 07:59:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-19 07:59:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 07:59:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 223 proven. 162 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 07:59:51,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:59:51,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545646377] [2022-03-19 07:59:51,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545646377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:59:51,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19524319] [2022-03-19 07:59:51,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:59:51,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:59:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:59:51,192 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) [2022-03-19 07:59:51,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 07:59:51,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 07:59:51,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:59:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 07:59:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:59:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 264 proven. 121 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 07:59:51,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:59:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 264 proven. 121 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 07:59:52,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19524319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:59:52,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:59:52,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 42 [2022-03-19 07:59:52,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:59:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432392150] [2022-03-19 07:59:52,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432392150] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:59:52,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:59:52,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 07:59:52,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811634384] [2022-03-19 07:59:52,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:59:52,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 07:59:52,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:52,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 07:59:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 07:59:52,029 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 07:59:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:59:52,573 INFO L93 Difference]: Finished difference Result 186 states and 199 transitions. [2022-03-19 07:59:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 07:59:52,573 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 124 [2022-03-19 07:59:52,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:59:52,574 INFO L225 Difference]: With dead ends: 186 [2022-03-19 07:59:52,574 INFO L226 Difference]: Without dead ends: 130 [2022-03-19 07:59:52,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=790, Invalid=3632, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 07:59:52,576 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:59:52,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 82 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:59:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-19 07:59:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-03-19 07:59:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 07:59:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-03-19 07:59:52,593 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2022-03-19 07:59:52,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:59:52,593 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-03-19 07:59:52,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 07:59:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-03-19 07:59:52,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-19 07:59:52,594 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:59:52,594 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:59:52,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 07:59:52,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:59:52,795 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:59:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:59:52,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1844578604, now seen corresponding path program 43 times [2022-03-19 07:59:52,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:59:52,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [578085117] [2022-03-19 07:59:52,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:59:52,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:59:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1844578604, now seen corresponding path program 44 times [2022-03-19 07:59:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:59:52,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094480028] [2022-03-19 07:59:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:59:52,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:59:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:59:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 07:59:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 07:59:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 07:59:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 07:59:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 07:59:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 07:59:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 07:59:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-19 07:59:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 07:59:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 07:59:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-19 07:59:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:59:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 22 proven. 386 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 07:59:53,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:59:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094480028] [2022-03-19 07:59:53,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094480028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:59:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475936209] [2022-03-19 07:59:53,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:59:53,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:59:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:59:53,252 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) [2022-03-19 07:59:53,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 07:59:53,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:59:53,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:59:53,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 07:59:53,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:59:53,412 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 [2022-03-19 08:03:36,374 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 19 treesize of output 7 [2022-03-19 08:03:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 08:03:36,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:38,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-19 08:03:38,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-19 08:03:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 22 proven. 386 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 08:03:38,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475936209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:03:38,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:03:38,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 30] total 47 [2022-03-19 08:03:38,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:38,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [578085117] [2022-03-19 08:03:38,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [578085117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:38,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:38,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 08:03:38,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659494204] [2022-03-19 08:03:38,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:38,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 08:03:38,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 08:03:38,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2017, Unknown=12, NotChecked=0, Total=2162 [2022-03-19 08:03:38,704 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 08:03:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:03:40,115 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2022-03-19 08:03:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 08:03:40,115 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 126 [2022-03-19 08:03:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:03:40,116 INFO L225 Difference]: With dead ends: 142 [2022-03-19 08:03:40,116 INFO L226 Difference]: Without dead ends: 140 [2022-03-19 08:03:40,117 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 235 SyntacticMatches, 26 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 225.6s TimeCoverageRelationStatistics Valid=304, Invalid=5536, Unknown=12, NotChecked=0, Total=5852 [2022-03-19 08:03:40,118 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 85 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 08:03:40,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 168 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 08:03:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-19 08:03:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2022-03-19 08:03:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 108 states have internal predecessors, (109), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 08:03:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-03-19 08:03:40,135 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 126 [2022-03-19 08:03:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:03:40,137 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-03-19 08:03:40,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 08:03:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-03-19 08:03:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-19 08:03:40,138 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:03:40,138 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:03:40,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 08:03:40,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:40,342 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:03:40,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:03:40,342 INFO L85 PathProgramCache]: Analyzing trace with hash 886065326, now seen corresponding path program 45 times [2022-03-19 08:03:40,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:40,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1125117290] [2022-03-19 08:03:40,343 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:03:40,343 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:03:40,343 INFO L85 PathProgramCache]: Analyzing trace with hash 886065326, now seen corresponding path program 46 times [2022-03-19 08:03:40,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:03:40,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827748798] [2022-03-19 08:03:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:03:40,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:03:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:03:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 08:03:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 08:03:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 08:03:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 08:03:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 08:03:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 08:03:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 08:03:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-19 08:03:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 08:03:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 08:03:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-19 08:03:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 08:03:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 267 proven. 189 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 08:03:40,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:03:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827748798] [2022-03-19 08:03:40,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827748798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:03:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504036015] [2022-03-19 08:03:40,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:03:40,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:40,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:03:40,647 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) [2022-03-19 08:03:40,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 08:03:41,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:03:41,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:03:41,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 08:03:41,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:03:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 312 proven. 144 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 08:03:41,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 312 proven. 144 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 08:03:41,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504036015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:03:41,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:03:41,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 45 [2022-03-19 08:03:41,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:41,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1125117290] [2022-03-19 08:03:41,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1125117290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:41,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:41,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 08:03:41,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936535456] [2022-03-19 08:03:41,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:41,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 08:03:41,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:41,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 08:03:41,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 08:03:41,778 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 08:03:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:03:42,377 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2022-03-19 08:03:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 08:03:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 134 [2022-03-19 08:03:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:03:42,379 INFO L225 Difference]: With dead ends: 200 [2022-03-19 08:03:42,379 INFO L226 Difference]: Without dead ends: 140 [2022-03-19 08:03:42,380 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=906, Invalid=4206, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 08:03:42,380 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:03:42,380 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 89 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:03:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-19 08:03:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-03-19 08:03:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 109 states have (on average 1.018348623853211) internal successors, (111), 110 states have internal predecessors, (111), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 08:03:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-03-19 08:03:42,398 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2022-03-19 08:03:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:03:42,398 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-03-19 08:03:42,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 08:03:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-03-19 08:03:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-19 08:03:42,399 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:03:42,399 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:03:42,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 08:03:42,603 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,SelfDestructingSolverStorable24 [2022-03-19 08:03:42,603 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:03:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:03:42,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1055030388, now seen corresponding path program 47 times [2022-03-19 08:03:42,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:42,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [833557080] [2022-03-19 08:03:42,604 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:03:42,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:03:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1055030388, now seen corresponding path program 48 times [2022-03-19 08:03:42,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:03:42,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197722601] [2022-03-19 08:03:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:03:42,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:03:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:03:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 08:03:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 08:03:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 08:03:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 08:03:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 08:03:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 08:03:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 08:03:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 08:03:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 08:03:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-19 08:03:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-19 08:03:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-19 08:03:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 24 proven. 457 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 08:03:43,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:03:43,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197722601] [2022-03-19 08:03:43,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197722601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:03:43,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134268165] [2022-03-19 08:03:43,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:03:43,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:43,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:03:43,305 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) [2022-03-19 08:03:43,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 08:03:43,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-19 08:03:43,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:03:43,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 08:03:43,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:03:43,933 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 [2022-03-19 08:03:46,510 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 08:03:46,510 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 [2022-03-19 08:03:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 276 proven. 205 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 08:03:46,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:46,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134268165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:03:46,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:03:46,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 66 [2022-03-19 08:03:46,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [833557080] [2022-03-19 08:03:46,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [833557080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:46,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:46,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 08:03:46,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088619505] [2022-03-19 08:03:46,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:46,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 08:03:46,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:46,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 08:03:46,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4106, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 08:03:46,723 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 08:03:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:03:48,344 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2022-03-19 08:03:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 08:03:48,344 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 136 [2022-03-19 08:03:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:03:48,345 INFO L225 Difference]: With dead ends: 152 [2022-03-19 08:03:48,345 INFO L226 Difference]: Without dead ends: 150 [2022-03-19 08:03:48,346 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 112 SyntacticMatches, 24 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=727, Invalid=9173, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 08:03:48,346 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 90 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 08:03:48,346 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 151 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2808 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 08:03:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-19 08:03:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-03-19 08:03:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 115 states have (on average 1.017391304347826) internal successors, (117), 116 states have internal predecessors, (117), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 08:03:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-03-19 08:03:48,365 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 136 [2022-03-19 08:03:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:03:48,365 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-03-19 08:03:48,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 08:03:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-03-19 08:03:48,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-19 08:03:48,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:03:48,366 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:03:48,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 08:03:48,579 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,SelfDestructingSolverStorable25 [2022-03-19 08:03:48,579 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:03:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:03:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash -490496666, now seen corresponding path program 49 times [2022-03-19 08:03:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1736584442] [2022-03-19 08:03:48,580 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:03:48,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:03:48,581 INFO L85 PathProgramCache]: Analyzing trace with hash -490496666, now seen corresponding path program 50 times [2022-03-19 08:03:48,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:03:48,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087276403] [2022-03-19 08:03:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:03:48,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:03:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:03:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 08:03:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 08:03:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 08:03:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 08:03:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 08:03:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 08:03:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 08:03:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 08:03:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 08:03:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-19 08:03:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-19 08:03:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-19 08:03:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-19 08:03:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 315 proven. 218 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 08:03:48,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:03:48,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087276403] [2022-03-19 08:03:48,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087276403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:03:48,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153603873] [2022-03-19 08:03:48,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:03:48,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:48,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:03:48,936 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) [2022-03-19 08:03:48,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 08:03:49,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:03:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:03:49,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 08:03:49,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:03:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 364 proven. 169 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 08:03:49,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 364 proven. 169 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 08:03:49,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153603873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:03:49,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:03:49,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 48 [2022-03-19 08:03:49,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:49,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1736584442] [2022-03-19 08:03:49,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1736584442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:49,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:49,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 08:03:49,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382798069] [2022-03-19 08:03:49,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:49,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 08:03:49,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:49,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 08:03:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1754, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 08:03:49,805 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 08:03:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:03:50,399 INFO L93 Difference]: Finished difference Result 214 states and 229 transitions. [2022-03-19 08:03:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 08:03:50,399 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 144 [2022-03-19 08:03:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:03:50,400 INFO L225 Difference]: With dead ends: 214 [2022-03-19 08:03:50,400 INFO L226 Difference]: Without dead ends: 150 [2022-03-19 08:03:50,401 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1030, Invalid=4822, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 08:03:50,401 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:03:50,401 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 71 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:03:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-19 08:03:50,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-03-19 08:03:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.017094017094017) internal successors, (119), 118 states have internal predecessors, (119), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 08:03:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-03-19 08:03:50,426 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2022-03-19 08:03:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:03:50,426 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-03-19 08:03:50,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 08:03:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-03-19 08:03:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 08:03:50,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:03:50,427 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:03:50,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 08:03:50,635 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,SelfDestructingSolverStorable26 [2022-03-19 08:03:50,635 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:03:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:03:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 564353732, now seen corresponding path program 51 times [2022-03-19 08:03:50,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:50,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [316664958] [2022-03-19 08:03:50,636 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:03:50,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:03:50,637 INFO L85 PathProgramCache]: Analyzing trace with hash 564353732, now seen corresponding path program 52 times [2022-03-19 08:03:50,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:03:50,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060006588] [2022-03-19 08:03:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:03:50,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:03:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:03:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:03:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 08:03:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 08:03:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 08:03:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 08:03:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 08:03:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 08:03:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 08:03:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-19 08:03:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-19 08:03:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-19 08:03:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-19 08:03:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-19 08:03:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 26 proven. 534 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 08:03:51,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:03:51,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060006588] [2022-03-19 08:03:51,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060006588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:03:51,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298180561] [2022-03-19 08:03:51,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:03:51,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:51,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:03:51,244 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) [2022-03-19 08:03:51,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 08:03:51,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:03:51,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:03:51,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 08:03:51,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:03:52,006 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 [2022-03-19 08:03:55,291 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 08:03:55,291 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 [2022-03-19 08:03:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 325 proven. 235 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 08:03:55,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:55,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298180561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:03:55,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:03:55,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 70 [2022-03-19 08:03:55,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:55,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [316664958] [2022-03-19 08:03:55,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [316664958] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:55,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:55,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 08:03:55,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306684497] [2022-03-19 08:03:55,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:55,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 08:03:55,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:55,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 08:03:55,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4623, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 08:03:55,715 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 08:03:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:03:57,653 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2022-03-19 08:03:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 08:03:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 146 [2022-03-19 08:03:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:03:57,654 INFO L225 Difference]: With dead ends: 162 [2022-03-19 08:03:57,654 INFO L226 Difference]: Without dead ends: 160 [2022-03-19 08:03:57,655 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 120 SyntacticMatches, 26 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=791, Invalid=10339, Unknown=0, NotChecked=0, Total=11130 [2022-03-19 08:03:57,655 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 95 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 3466 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:03:57,655 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 186 Invalid, 3560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3466 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 08:03:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-19 08:03:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2022-03-19 08:03:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 123 states have (on average 1.016260162601626) internal successors, (125), 124 states have internal predecessors, (125), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 08:03:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-03-19 08:03:57,676 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 146 [2022-03-19 08:03:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:03:57,676 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-03-19 08:03:57,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 08:03:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-03-19 08:03:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-19 08:03:57,677 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:03:57,677 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:03:57,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 08:03:57,891 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,SelfDestructingSolverStorable27 [2022-03-19 08:03:57,891 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:03:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:03:57,892 INFO L85 PathProgramCache]: Analyzing trace with hash -696599394, now seen corresponding path program 53 times [2022-03-19 08:03:57,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:57,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1451700306] [2022-03-19 08:03:57,892 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:03:57,893 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:03:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash -696599394, now seen corresponding path program 54 times [2022-03-19 08:03:57,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:03:57,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524615345] [2022-03-19 08:03:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:03:57,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:03:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:03:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 08:03:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 08:03:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 08:03:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 08:03:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 08:03:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 08:03:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 08:03:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 08:03:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-19 08:03:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-19 08:03:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-19 08:03:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-19 08:03:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-19 08:03:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-03-19 08:03:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:03:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 367 proven. 249 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 08:03:58,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:03:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524615345] [2022-03-19 08:03:58,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524615345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:03:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804957317] [2022-03-19 08:03:58,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:03:58,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:03:58,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:03:58,253 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) [2022-03-19 08:03:58,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 08:03:58,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-19 08:03:58,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:03:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 08:03:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:03:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 420 proven. 196 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 08:03:59,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:03:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 420 proven. 196 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 08:03:59,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804957317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:03:59,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:03:59,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 51 [2022-03-19 08:03:59,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:03:59,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1451700306] [2022-03-19 08:03:59,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1451700306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:03:59,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:03:59,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 08:03:59,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862859262] [2022-03-19 08:03:59,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:03:59,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 08:03:59,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:03:59,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 08:03:59,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=1983, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 08:03:59,433 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 08:04:00,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:04:00,116 INFO L93 Difference]: Finished difference Result 228 states and 244 transitions. [2022-03-19 08:04:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 08:04:00,117 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 154 [2022-03-19 08:04:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:04:00,118 INFO L225 Difference]: With dead ends: 228 [2022-03-19 08:04:00,118 INFO L226 Difference]: Without dead ends: 160 [2022-03-19 08:04:00,119 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1162, Invalid=5480, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 08:04:00,119 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:04:00,119 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 88 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:04:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-19 08:04:00,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-03-19 08:04:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.016) internal successors, (127), 126 states have internal predecessors, (127), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 08:04:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-03-19 08:04:00,144 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2022-03-19 08:04:00,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:04:00,144 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-03-19 08:04:00,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 08:04:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-03-19 08:04:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-19 08:04:00,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:04:00,145 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:04:00,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 08:04:00,349 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 08:04:00,349 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:04:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:04:00,350 INFO L85 PathProgramCache]: Analyzing trace with hash -829694852, now seen corresponding path program 55 times [2022-03-19 08:04:00,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:04:00,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1772078523] [2022-03-19 08:04:00,351 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:04:00,351 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:04:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash -829694852, now seen corresponding path program 56 times [2022-03-19 08:04:00,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:04:00,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652785226] [2022-03-19 08:04:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:04:00,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:04:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:04:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 08:04:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 08:04:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 08:04:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 08:04:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 08:04:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 08:04:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 08:04:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 08:04:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-19 08:04:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 08:04:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-19 08:04:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-03-19 08:04:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-19 08:04:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-19 08:04:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:04:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 28 proven. 617 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 08:04:01,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:04:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652785226] [2022-03-19 08:04:01,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652785226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:04:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621682902] [2022-03-19 08:04:01,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:04:01,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:04:01,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:04:01,084 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) [2022-03-19 08:04:01,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 08:04:01,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:04:01,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:04:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 08:04:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:04:01,302 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 [2022-03-19 08:10:01,126 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 19 treesize of output 7 [2022-03-19 08:10:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 08:10:01,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:10:03,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-19 08:10:03,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-19 08:10:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 28 proven. 617 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 08:10:03,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621682902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:10:03,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:10:03,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 36] total 56 [2022-03-19 08:10:03,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:10:03,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1772078523] [2022-03-19 08:10:03,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1772078523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:10:03,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:10:03,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 08:10:03,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641097318] [2022-03-19 08:10:03,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:10:03,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 08:10:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 08:10:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2905, Unknown=15, NotChecked=0, Total=3080 [2022-03-19 08:10:03,542 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 08:10:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:10:05,526 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2022-03-19 08:10:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 08:10:05,527 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 156 [2022-03-19 08:10:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:10:05,528 INFO L225 Difference]: With dead ends: 172 [2022-03-19 08:10:05,528 INFO L226 Difference]: Without dead ends: 170 [2022-03-19 08:10:05,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 292 SyntacticMatches, 32 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 362.8s TimeCoverageRelationStatistics Valid=364, Invalid=7993, Unknown=15, NotChecked=0, Total=8372 [2022-03-19 08:10:05,529 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 100 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 4040 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 4040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:10:05,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 201 Invalid, 4140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 4040 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 08:10:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-19 08:10:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2022-03-19 08:10:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 131 states have (on average 1.015267175572519) internal successors, (133), 132 states have internal predecessors, (133), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 08:10:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2022-03-19 08:10:05,555 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 156 [2022-03-19 08:10:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:10:05,555 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2022-03-19 08:10:05,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 08:10:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2022-03-19 08:10:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-19 08:10:05,556 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:10:05,556 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:10:05,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 08:10:05,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:10:05,767 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:10:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:10:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash 679609942, now seen corresponding path program 57 times [2022-03-19 08:10:05,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:05,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [392279578] [2022-03-19 08:10:05,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:10:05,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:10:05,769 INFO L85 PathProgramCache]: Analyzing trace with hash 679609942, now seen corresponding path program 58 times [2022-03-19 08:10:05,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:10:05,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388899812] [2022-03-19 08:10:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:10:05,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:10:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:10:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 08:10:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 08:10:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 08:10:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 08:10:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 08:10:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 08:10:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 08:10:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 08:10:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-19 08:10:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 08:10:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-19 08:10:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-03-19 08:10:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-19 08:10:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-19 08:10:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-19 08:10:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 423 proven. 282 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 08:10:06,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:10:06,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388899812] [2022-03-19 08:10:06,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388899812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:10:06,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109644391] [2022-03-19 08:10:06,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:10:06,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:10:06,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:10:06,204 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) [2022-03-19 08:10:06,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 08:10:06,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:10:06,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:10:06,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 08:10:06,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:10:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 480 proven. 225 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 08:10:07,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:10:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 480 proven. 225 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 08:10:07,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109644391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:10:07,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:10:07,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2022-03-19 08:10:07,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:10:07,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [392279578] [2022-03-19 08:10:07,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [392279578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:10:07,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:10:07,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 08:10:07,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635450820] [2022-03-19 08:10:07,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:10:07,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 08:10:07,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:07,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 08:10:07,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=2226, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 08:10:07,486 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 08:10:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:10:08,330 INFO L93 Difference]: Finished difference Result 242 states and 259 transitions. [2022-03-19 08:10:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 08:10:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 164 [2022-03-19 08:10:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:10:08,336 INFO L225 Difference]: With dead ends: 242 [2022-03-19 08:10:08,336 INFO L226 Difference]: Without dead ends: 170 [2022-03-19 08:10:08,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1302, Invalid=6180, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 08:10:08,338 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:10:08,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 115 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:10:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-19 08:10:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-03-19 08:10:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 08:10:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-03-19 08:10:08,380 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-03-19 08:10:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:10:08,380 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-03-19 08:10:08,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 08:10:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-03-19 08:10:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-03-19 08:10:08,382 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:10:08,382 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:10:08,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 08:10:08,595 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,SelfDestructingSolverStorable30 [2022-03-19 08:10:08,595 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:10:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:10:08,596 INFO L85 PathProgramCache]: Analyzing trace with hash -817141580, now seen corresponding path program 59 times [2022-03-19 08:10:08,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:08,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308973530] [2022-03-19 08:10:08,596 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:10:08,597 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:10:08,597 INFO L85 PathProgramCache]: Analyzing trace with hash -817141580, now seen corresponding path program 60 times [2022-03-19 08:10:08,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:10:08,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671706124] [2022-03-19 08:10:08,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:10:08,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:10:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:10:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 08:10:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 08:10:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 08:10:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 08:10:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 08:10:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 08:10:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-19 08:10:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 08:10:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 08:10:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-19 08:10:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 08:10:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-03-19 08:10:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-03-19 08:10:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-03-19 08:10:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-19 08:10:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 30 proven. 706 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 08:10:09,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:10:09,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671706124] [2022-03-19 08:10:09,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671706124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:10:09,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210089650] [2022-03-19 08:10:09,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:10:09,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:10:09,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:10:09,277 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) [2022-03-19 08:10:09,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 08:10:09,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-19 08:10:09,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:10:09,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 08:10:09,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:10:10,062 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 [2022-03-19 08:10:14,499 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 08:10:14,499 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 [2022-03-19 08:10:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 435 proven. 301 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 08:10:14,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:10:14,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210089650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:10:14,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:10:14,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41] total 78 [2022-03-19 08:10:14,760 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:10:14,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308973530] [2022-03-19 08:10:14,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308973530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:10:14,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:10:14,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 08:10:14,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162464749] [2022-03-19 08:10:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:10:14,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 08:10:14,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 08:10:14,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=5720, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 08:10:14,761 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 08:10:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:10:17,206 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2022-03-19 08:10:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 08:10:17,207 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 166 [2022-03-19 08:10:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:10:17,208 INFO L225 Difference]: With dead ends: 182 [2022-03-19 08:10:17,208 INFO L226 Difference]: Without dead ends: 180 [2022-03-19 08:10:17,209 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 136 SyntacticMatches, 30 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=955, Invalid=12851, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 08:10:17,209 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 105 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 4404 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 4404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:10:17,209 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 208 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 4404 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 08:10:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-19 08:10:17,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2022-03-19 08:10:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 139 states have (on average 1.014388489208633) internal successors, (141), 140 states have internal predecessors, (141), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 08:10:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-03-19 08:10:17,236 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 166 [2022-03-19 08:10:17,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:10:17,237 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-03-19 08:10:17,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 08:10:17,237 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-03-19 08:10:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-03-19 08:10:17,238 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:10:17,238 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:10:17,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 08:10:17,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:10:17,439 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:10:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:10:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash -705832306, now seen corresponding path program 61 times [2022-03-19 08:10:17,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:17,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2008168986] [2022-03-19 08:10:17,441 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:10:17,441 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:10:17,441 INFO L85 PathProgramCache]: Analyzing trace with hash -705832306, now seen corresponding path program 62 times [2022-03-19 08:10:17,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:10:17,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605758733] [2022-03-19 08:10:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:10:17,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:10:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:10:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 08:10:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 08:10:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 08:10:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 08:10:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 08:10:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 08:10:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-19 08:10:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 08:10:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 08:10:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-19 08:10:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 08:10:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-03-19 08:10:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-03-19 08:10:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-03-19 08:10:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-19 08:10:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-03-19 08:10:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 483 proven. 317 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 08:10:17,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:10:17,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605758733] [2022-03-19 08:10:17,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605758733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:10:17,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911693238] [2022-03-19 08:10:17,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:10:17,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:10:17,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:10:17,897 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) [2022-03-19 08:10:17,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 08:10:18,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:10:18,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:10:18,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 08:10:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:10:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 544 proven. 256 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 08:10:18,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:10:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 544 proven. 256 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 08:10:19,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911693238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:10:19,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:10:19,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 57 [2022-03-19 08:10:19,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:10:19,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2008168986] [2022-03-19 08:10:19,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2008168986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:10:19,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:10:19,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 08:10:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765521909] [2022-03-19 08:10:19,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:10:19,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 08:10:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 08:10:19,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=2483, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 08:10:19,006 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 08:10:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:10:19,839 INFO L93 Difference]: Finished difference Result 256 states and 274 transitions. [2022-03-19 08:10:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 08:10:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 174 [2022-03-19 08:10:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:10:19,841 INFO L225 Difference]: With dead ends: 256 [2022-03-19 08:10:19,841 INFO L226 Difference]: Without dead ends: 180 [2022-03-19 08:10:19,842 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1450, Invalid=6922, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 08:10:19,842 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:10:19,842 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:10:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-19 08:10:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-03-19 08:10:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 142 states have internal predecessors, (143), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 08:10:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2022-03-19 08:10:19,869 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2022-03-19 08:10:19,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:10:19,869 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2022-03-19 08:10:19,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 08:10:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2022-03-19 08:10:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-19 08:10:19,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:10:19,870 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:10:19,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 08:10:20,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:10:20,075 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:10:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:10:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1914806420, now seen corresponding path program 63 times [2022-03-19 08:10:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:20,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698076579] [2022-03-19 08:10:20,077 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:10:20,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:10:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1914806420, now seen corresponding path program 64 times [2022-03-19 08:10:20,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:10:20,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042858816] [2022-03-19 08:10:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:10:20,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:10:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:10:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 08:10:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 08:10:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 08:10:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 08:10:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 08:10:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 08:10:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 08:10:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 08:10:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-19 08:10:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-19 08:10:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-19 08:10:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-19 08:10:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-19 08:10:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-19 08:10:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-19 08:10:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-19 08:10:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 32 proven. 801 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 08:10:20,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:10:20,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042858816] [2022-03-19 08:10:20,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042858816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:10:20,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847302401] [2022-03-19 08:10:20,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:10:20,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:10:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:10:20,817 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) [2022-03-19 08:10:20,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 08:10:21,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:10:21,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:10:21,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 08:10:21,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:10:21,940 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 [2022-03-19 08:10:26,628 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-19 08:10:26,629 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 [2022-03-19 08:10:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 496 proven. 337 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 08:10:26,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:10:26,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847302401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:10:26,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 08:10:26,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43] total 82 [2022-03-19 08:10:26,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:10:26,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698076579] [2022-03-19 08:10:26,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698076579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:10:26,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:10:26,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 08:10:26,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545322770] [2022-03-19 08:10:26,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:10:26,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 08:10:26,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 08:10:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=6312, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 08:10:26,895 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 08:10:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:10:29,594 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2022-03-19 08:10:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 08:10:29,594 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 176 [2022-03-19 08:10:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:10:29,595 INFO L225 Difference]: With dead ends: 192 [2022-03-19 08:10:29,595 INFO L226 Difference]: Without dead ends: 190 [2022-03-19 08:10:29,596 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 144 SyntacticMatches, 32 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3414 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1043, Invalid=14209, Unknown=0, NotChecked=0, Total=15252 [2022-03-19 08:10:29,596 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 110 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 4976 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 08:10:29,596 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 223 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4976 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 08:10:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-19 08:10:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2022-03-19 08:10:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 148 states have internal predecessors, (149), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 08:10:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-03-19 08:10:29,628 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 176 [2022-03-19 08:10:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:10:29,628 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-03-19 08:10:29,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 08:10:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-03-19 08:10:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-19 08:10:29,629 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:10:29,629 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:10:29,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 08:10:29,841 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,SelfDestructingSolverStorable33 [2022-03-19 08:10:29,842 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:10:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:10:29,842 INFO L85 PathProgramCache]: Analyzing trace with hash 911907142, now seen corresponding path program 65 times [2022-03-19 08:10:29,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:29,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465910153] [2022-03-19 08:10:29,843 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:10:29,843 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:10:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash 911907142, now seen corresponding path program 66 times [2022-03-19 08:10:29,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:10:29,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280996212] [2022-03-19 08:10:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:10:29,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:10:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:10:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 08:10:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 08:10:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 08:10:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 08:10:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 08:10:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 08:10:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 08:10:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 08:10:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-19 08:10:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-19 08:10:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-19 08:10:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-19 08:10:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-19 08:10:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-19 08:10:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-19 08:10:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-19 08:10:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-03-19 08:10:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 547 proven. 354 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 08:10:30,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:10:30,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280996212] [2022-03-19 08:10:30,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280996212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:10:30,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217764237] [2022-03-19 08:10:30,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:10:30,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:10:30,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:10:30,330 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) [2022-03-19 08:10:30,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 08:10:31,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-19 08:10:31,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:10:31,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 08:10:31,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:10:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 612 proven. 289 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 08:10:31,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:10:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 612 proven. 289 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 08:10:32,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217764237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:10:32,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:10:32,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 60 [2022-03-19 08:10:32,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:10:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465910153] [2022-03-19 08:10:32,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465910153] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:10:32,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:10:32,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 08:10:32,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977417289] [2022-03-19 08:10:32,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:10:32,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 08:10:32,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:32,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 08:10:32,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=2754, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 08:10:32,257 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 08:10:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:10:33,094 INFO L93 Difference]: Finished difference Result 270 states and 289 transitions. [2022-03-19 08:10:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 08:10:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 184 [2022-03-19 08:10:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:10:33,096 INFO L225 Difference]: With dead ends: 270 [2022-03-19 08:10:33,096 INFO L226 Difference]: Without dead ends: 190 [2022-03-19 08:10:33,096 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 383 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1606, Invalid=7706, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 08:10:33,096 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:10:33,097 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 94 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:10:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-19 08:10:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-03-19 08:10:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 150 states have internal predecessors, (151), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 08:10:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-03-19 08:10:33,126 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 184 [2022-03-19 08:10:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:10:33,127 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-03-19 08:10:33,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 08:10:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-03-19 08:10:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-03-19 08:10:33,127 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:10:33,127 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:10:33,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 08:10:33,336 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,SelfDestructingSolverStorable34 [2022-03-19 08:10:33,336 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:10:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:10:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash -859234140, now seen corresponding path program 67 times [2022-03-19 08:10:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:10:33,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1402859341] [2022-03-19 08:10:33,337 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 08:10:33,337 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 08:10:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash -859234140, now seen corresponding path program 68 times [2022-03-19 08:10:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:10:33,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888804866] [2022-03-19 08:10:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:10:33,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:10:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:10:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 08:10:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 08:10:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 08:10:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 08:10:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 08:10:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 08:10:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 08:10:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-19 08:10:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-19 08:10:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-19 08:10:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-19 08:10:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-19 08:10:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-03-19 08:10:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-03-19 08:10:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-03-19 08:10:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-03-19 08:10:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-03-19 08:10:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:10:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 34 proven. 902 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 08:10:34,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:10:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888804866] [2022-03-19 08:10:34,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888804866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:10:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268627211] [2022-03-19 08:10:34,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:10:34,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:10:34,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:10:34,154 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) [2022-03-19 08:10:34,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 08:10:34,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:10:34,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:10:34,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-19 08:10:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:10:34,437 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